Popular Circuits Page 199
- Page 199
-
I have a copper mesh (10cm x 10cm square) in a vacuum chamber connected to a BNC connector by a 24-cm-long copper wire. The goal is to switch the mesh voltage (referenced to ground) from 8 V to ~0 V quickly. (This will switch the electric field in the....
-
-
-
The Motion Sensor Switch circuit is a motion sensor controlled automatic water sprinkler but you can easily add an alarm/light function too. Before beginning the construction contact your nearest electronics component vendor and procure a readymade box-type....
-
When the start switch is pushed, the output of the charger goes to 14.5 V. As the batttery approaches full charge, the charging current decreases and the output voltage is reduced form 14.5V to about 12.5V, terminating the charging process. Transistor Q1....
-
The schematic diagram described here is a TMP01 Celsius Scale Temperature Sensor circuit. This circuit is used to convert the VPTAT output voltage that is....
-
It says that D1 compensates for D2`s forward drop by providing 0. 6V of bias. Is the +5V an external 5v source How does it compensate The R1, R3 and D1 basically creates a 0. 6V bias on the other side of the capacitor, so that a positive swing in the signal....
-
-
This design adopts a well established circuit topology for the power amplifier, using a single-rail supply of about 60V and capacitor-coupling for the speaker(s). The advantages for a guitar amplifier are the very simple circuitry, even for comparatively....
-
The SC41343 is designed as one kind of infrared, ultrasonic or RF remote control launch coding circuit. The internal circuit is composed of the sequence generator, control logic circuit?4-bit shift register?data extraction circuit and the latch circuit.....
-
-
AD7s23 is an 8-bit multiplication DA converter, the output voltage of the analog input and the digital input of the product. Inside! Unit consists of eight analog switches (cha..
-
This is the standard configuration on how to Interface a uC like 8051 to PC RS232 with MAX232A. The UART or Serial port was not present in 8049/8749 chips which were the ancestors of 8051/8031. Pages of code were needed to make a software UART in MCS-48. The....
-
-
This is the new and improved nixie clock using one of the smallest nixies in the world, the Russian IN-17 nixies. The clock circuit is based on revisions of the version 1 nixie clock that were used in my Single Meter Clock. The logic circuits of the clock is....
-
This is Micro inverter or The inverter very small-sized, perform modify from the energy battery the small-sized , have the value voltage about 220V AC Volt...
-
First off I should mention that this is supplemental Instructable to the countless others that show you how to build a USB charger. I am assuming you....
-
The SL517 is designed as the audio, RF or infrared decoder circuit that can be used in the electronic toy application. The internal circuit is composed of the analog amplifier, the frequency divider, the bistable circuit and the driver. Features It uses the....
-
The chart shows a function generator circuit composed of 555 timer. The circuit consists of a CH7555 timer and some transistors and RC components. It can generate triangle wave, square wave, sine wave, sawtooth and square wave sweep simultaneously. Ramp can....
-
Pulses from the distributor points are passed through a current limiting resistor, rectified, and clipped at 4 volts. Via Q1 and the diode pump, a dc voltage proportional to engine rpm is presented to RV1; the sharp transfer characteristic of a CMOS gate,....
-
An infrared remote control tester circuit that can be made without spenting much money. This IR tester build around an infrared reciever module TSOP1738. We can observe the remote control state by listening to the buzzer sound. The circuit is very sensitive....
-
The LMV1090 is a fully Analog dual differential input, differ- ential output, Microphone array Amplifier designed to reduce background acoustic noise, while delivering superb speech clarity in voice Communication applications. The LMV1090 preserves....
-
Resistance temperature sensor (RTD, resistive temperature device) comes in NTC (negative temperature coefficient) and PTC (positive temperature coefficient)....
-
Isolation amplifiers provide an effective method to protect IGBTs against over-current, overload and overvoltage conditions in addition to their current/voltage sensing function. Using these devices together with feature-rich gate drivers, you can implement....
-
Using the LM4992 stereo audio power amplifier you can design a very simple audio power amplifier electronic project, that can be used for portable electronic devices. This power audio amplifier circuit is capable of delivering 1 watt, per channel, of....
-
This wideband amplifier uses only five components. External signals enter pin 3 of IC1 via ac coupling capacitor Cl. Following amplification, the boosted signals from IC1 pin 1 are coupled to the output by capacitor C2. Capacitor C3 decouples the de....
-
By a crystal oscillator b DTL integrated circuit constituted DTL is shown by the crystal oscillator integrated circuits, and the oscillation frequency..
-
The circuit is built around a 555 oscillator (Ul), which is turned on when a trigger is applied by touching the touch ..
-
The XLR connector allows us to connect the microphone`s output to our preamplifier circuit. This preamplifier was designed and built by our Electrical Engineers using discrete components. The preamplifier`s signal is then fed to the Maxim Class-D amplifier.....
-
A DC motor worksby converting electricpower into mechanical work. This is accomplished by forcing current through a coil and producing a magnetic field that spins the motor. One technique to vary the speed of a DC motor is by varying the voltage on the coil.....
-
-
This triac-based 220V AC motor speed controller circuit is designed for controlling the speed of small household motors like drill machines. The speed of the motor can be controlled by changing the setting of P1. The setting of P1 determines the phase of the....
-
Library routines for 3-wire LCD interface based on 74HC595 shift register. More details are provided in the attached ReadMe document or posted at Do you want to unsubscribe in order to stop receiving notifications regarding "MikroC Pro for PIC driver routine....
-
The electronic pests killing lamp circuit consists of the oscillator, control circuit, high voltage generator, LED indicating circuit and power supply circuit, and the circuit is shown as the chart. The oscillator circuit is composed of the time-base....
-
In perfect discharge the batteries of lead acid, exists the fear they are destroyed. This circuit makes the work, this detection of discharge, protecting the batteries from destruction. At the discharge the polar voltage of batteries 12V of Lead acid, is not....
-
The following is an account of such an undertaking. Recently I was involved in a design review for a cost reduction project, where an older design was getting an update. The new design was a merging of two different designs, including someupdated parts and....
-
-
Security is a prime concern in our day-today life. Everyone wants to be as much secure as possible. An access control for doors forms a vital link in a security chain. The microcontroller based digital lock for Doors is an access control system that allows....
-
How would you use an SE with a chip enable? Good question and well one thing leads to another and before you know it a new solar roller is born. The design started out as a simple example of using the 1381wr SE to enable a 74AC240 chip. But with all those....
-
Build a Guitar Looper with an Arduino board. Here is how to produce pedalboard for electric guitar. The idea is to connect pedals to the Arduino, and to use them to control a software of sound processing in Pure Data. Here I show you the example of a....
-
A very simple 4 channel video amplifier electronic circuit project can be designed using NJM2582 ic suitable for video applications with SCART connector. Design of the circuit is very simple and require few external electronic parts. Some features of the....
-
Stepper motors are available in several versions and sizes with a variety of operating voltages. The advantage of this general-purpose controller is that is can be used with a wide range of operating voltages, from approximately 5 V to 18 V. It can drive the....
-
Experiments in rust electrolysis. The idea of using electricity to convert rust back into iron is not a new one, and electrolysis has been used for metal restoration by collectors and archaeologists for decades and the results can be very impressive, with....
-
An Astable Multivibrator is a switching circuit which switches its output on and off for a designed time period. This article also describes about its working. An Astable Multivibrator or a free running oscillator circuit is generally used to generate square....
-
The Maxim MAX 6665 ( provides a complete temperature-dependent fan controller. It can switch fans operating at voltages of up to 24 V and currents of up to 250 mA. The IC is available from the manufacturer in versions with preset threshold temperatures....
-
The noise reduction circuit is based on the observation that noise is always disturbing in intervals when music stops. It will attenuate the signal output....
-
Here is VU meter 10 LED circuit, This simple LED VU meter has only a few parts but it is useful as an indicator for the sound. The circuit is built around an...
-
Bicycle sensors provide two main purposes: to record the motion of the bicycle in order to assist with collision reconstruction, and to relay signals to the bicycle controls to keep the bicycle on course. This will pose several component requirements, as the....
-
The following circuit was designed by me in response to the request sent by PP. The article describes an LED emergency light circuit with advanced features such as, over charge battery cut off, day time auto-disable, and need less to say that the circuit....
-
The Unit is started by hand by revolving the two disks in opposite directions and continues to move without further input.
This device has only two moving parts namely the bearing races at the centre of the disk.
The disk are made of clear plastic upon....
-
A Code Practice Oscillator and that I must have built it some time ago. I had a vague recollection of the project. It certainly looked like something I might have built. There was a straight key in the same box that plugged right into the key jack. I opened....
-
The relay operates a certain time, td, after power is applied to it, and then it operates for a length of time, tc. The SCR fires when the voltage on Ci reaches VA. This operates the relay, which stays activated until the current charging C2 drops below the....
-
The ADEV Development System consists of the ATAR Target Module and the ADEV Test/Programming Module. The ATAR Target Module and the ADEV Test/Programming Module, together with development tools from Silicon Laboraties, Inc. (SL), can be used to develop....
-
-
The VFC in this circuit puts out an adequate sine-shaped output, but does not have good V-to-F linearity, and its frequency stability is not much better than 0.2%. An LM331 makes an excellent linear stable V-to-F converter, with a pulse output; Sine Wave....
-
-
Simple rectifier circuit replaces battery in vacuum-tube voltmeter. Provides good regulation and eliminates need for frequent battery replacement. Remove battery before using supply. AC source can be 6. 3-V secondary of filament transformer or terminals of....
-
How many times you needed some remote control to handle some electric device many times. There are lot of remote controls like infrared, RF, SMS (like my other circuit) and more. The basic small-range remote controls are 2, Infrared and RF (Radio Frequency).....
-
The detector is intended for the recognition of obstructions at distances of a few millimeters to a few centimeters. Similar detectors are used in the industry and health services, for instance, to open a water tap via a magnetic valve. The sensor, IC2, is a....
-
As shown in FIG constituted by RF2104 830MHz *** amplifier circuit works. Radio frequency (RF) signal from 5 feet input, via a preamplifier, amplified by an amplifier stage aft..
-
I wanted a robust, portable, compact antenna usable for horizontal and vertical polarisation to take along with my FT-817 when I go on vacation, camping etc. I also wanted the dipole to cover the VHF and UHF bands and if possible with some gain! As everybody....
-
The schematic diagram come from circuit: Battery Charger / Power Supply 14V / 4A with MOSFET VN64GA power supply. Go to that page to read the explanation about above power supply related circuit diagram. The following schematic is a high-performance battery....
-
Build a Hackduino board as explained here. Cut the speaker off of your wireless doorbell receiver. Leave as much wire connected to the receiver as yo....
-
DS1620 with a microprocessor to monitor temperature, by opening or closing the fan can be changed thermal conditions of the chip to achieve temperature control circuit as shown..
-
Here is a simple frequency counter designed to monitor the 240VAC mains supply. It as a frequency range of 0-999Hz, so it could also be used with 400Hz equipment. Standard TTL/CMOS logic is employed for the counters and display drivers, while an ELM446 (IC1)....
-
The article describes a simple method of making an incremental LED bar graph by using the IC 4017, which is rather equipped with specifications not suiting the present functions. Let`s learn how we can mod the IC for the operations. Here we study an easy....
-
This circuit can be useful to detect if the load of any battery charger or plug-in adapter supply is not properly connected. The load can be a set of batteries to be charged or any other type of battery or low dc voltage operated device. The circuit can....
-
Modulation is the process of changing some characteristics (e. g. amplitude, frequency or phase) of a carrier wave in accordance with the intensity of the signal is known as modulation. The figure shows the electronics circuit of a simple am modulator. It is....
-
A small signal amplifier, perhaps of the type to follow the previous buffer amplifier. We will assume we are buffering and amplifying our signal from the voltage controlled oscillator tutorial. In those examples we were generating and buffering 1.8 to 2.0....
-
The circuit use one simple, but good power supply, is enough its armor-clad by the remainder circuit, if it needs, with a aluminium, so that we avoid the noises. All the circuit can be placed in a small box, from which will only come out the RCA jack, the....
-
Using two op amps, this circuit produces a full-wave rectified version of the input signal. Op amp IC1 invert..
-
-
This is a very basic power failure lighting circuit based around a relay. This simple circuit has many uses, from lighting up rooms and walkways in the case of a power failure, to monitoring and security uses. There are many different power failure circuits....
-
Circuit shown in Figure 3-136. The line adds a limit switch SQ, when the motor is running with a mechanical device to a predetermined position, turn off the power and dynamic b..
-
The circuit is a simple rf-actuated switch which will respond to any strong field in the region of the pickup wire. The length of the wire will depend on how much coupling is needed, but a 250-mm length wrapped around the outside of the coaxial cable....
-
-
-
This simple circuit will find many applications as a battery eliminator for low power requirements. It consists of a transformer, a bridge rectifier and an electrolytic capacitor followed by a zener controlled series pass transistor. The output is stabilized....
-
This circuit provides a simple means to determine the voltage of a low-impedance voltage source. It works as follows. P1, which is a 1-W potentiometer, forms a voltage divider in combination with R1. The voltage at their junction is buffered by T1, and then....
-
Electronic calculator with automatic counting of the interface circuit shown in Figure. Figure (a) stroke switch so via optocoupler B control; Fig. (B) the use of reed KR and p..
-
Almost all of the audio power amplifier if using integrated circuit amplifier as circuit shown here which is use M12CLK is an power operational amplifier. It allows an output stage operating at even 2 ohms impedance and gain power 150W. For stability and....
-
The next stage is working with the first stage as well it is a fully-complementary. The cascode circuit is also in this place to improve linearity of the amplifiers. Cascode circuit requires a constant reference voltage biasing to make a cascode transistor....
-
The TBA120 Series ICs provide a high-gain limiting IF amplifier and a quadrature coincidence detector in one package. These ICs are primarily intended for extraction of TV intercarrier sound, which (in Europe) is frequency modulated onto a 5. 5MHz or 6MHz....
-
This is a programmable clock timer circuit that uses individual LEDs to indicate hours and minutes. 12 LEDs can be arranged in a circle to represent the 12 hours of a clock face and an additional 12 LEDs can be arranged in an outer circle to indicate 5....
-
This simple circuit can convert a single supply voltage, such as a battery, into a bipolar supply. Sense resistors Rl and R2 establish relative magnitudes for the resulting positive and negative voltages. Their rail-to-rail value, of course, equals....
-
TCA965 window discriminator IC allows the potentiometers RVl and RV2 to set up a window height and window width respectively. Rl and thermistor THl for a potential divider connected across the supply lines. Rl is chosen such that at ambient temperature the....
-
-
Digital pulse width measurement circuit is shown. It uses a l00kHz reference frequency, the count in the pulse width of the signal, the count value of the product of the resolu..
-
The sensors used are silicon phototransistors and Cadmium Sulfide (CdS) photocells. Both of these sensors allow less current to flow when they are dark than when lighted. Phototransistors change their conductance while photocells change their resistance....
-
Using a the controlled-half-plus-fixed-half-wave phase control method, this circuit can regulate an 860 a watt lamp load from half to full power. This circuit control the light output of the lamp from 30% to 100% because Half power applied to an incandescent....
-
Rectifier circuits based on semiconductor diodes typically handle voltage levels that greatly exceed the diodes` forward-voltage drops, which generally don`t affect the accuracy of the rectification process. However, the rectified signal`s accuracy suffers....
-
Copyright of this circuit belongs to smart kit electronics. In this page we will use this circuit to discuss for improvements and we will introduce some changes based on original schematic. This is an easy to build, but nevertheless very accurate and useful....
-
This circuit uses the 555 timer in an Astable operating mode and generates a continuous output via Pin 3 in the form of a square wave. This is then passed through the 22 ½F electrolytic capacitor to create a smooth oscillation which then creates the....
-
The following circuit shows about Simple Stepper Motor Controller Circuit Diagram. This circuit Based On The 7404 IC. Features: suitable heat ....
-
The NE602, U1, contains oscillator and mixer stages. The mixer combines the oscillator signal with the input rf signal to produce signals whose frequencies are the sum and difference of the input frequencies. For example, a 7.5-MHz signal is picked up by....
-
DW l11 capacitor step-down into Jenru half crossing according to Yin electrical hoof. After receiving bin CI Sh power output terminal to liVI/r j Right cut blood flow voltage, ..
-
This project is a FM Radio based on TDA7000 and LM386 integrated circuits. What is unusual about TDA7000 IC is how it operates. It is a proper FM superhet receiver, with the usual local oscillator, mixer, IF amplifier, limiter, and phase detector. The....
-
In the 20. 5X10. 5 cm rectangular piece, there is a hole of diameter 1. 5 cm to attach the motors for movement of the ROBO CAR with the help of nut and bolt system. The caster wheels used in the DTMF based ROBO CAR is made up from the cast iron material and....
-
Ul is an op amp used as a comparator. When the test probes are shorted together, resistors R1 and R2 bias the noninverti..
-
This is a design circuit for sine wave oscillators that will provide both a sine and square wave output for frequencies from below 20 Hz to above 20 KHz. The frequency of oscillation is easily tuned by varying a single resistor. This circuit is controlled by....
-
Using 567 IC tone decoder/detector, we can build a remote control and or intercom. This circuit can be used to control a relay, or to carry an audio signal ...
-
This diagram shows a redundant - closed loop ground wiring system. This is intended to reduce dependency on the frame for ground purposes in the charging circuit. The second (lower) diagram is as the bike was built using the 12 volt Alton generator and an....
-
This circuit reproduces the starting light sequence currently used by FISA for Formula One racing. It could be used with slot car sets (such as HO scale AFX/Life Like/Tyco sets) or radio controlled cars. IC1, a 555 timer IC, is used as a clock pulse....
I have a copper mesh (10cm x 10cm square) in a vacuum chamber connected to a BNC connector by a 24-cm-long copper wire. The goal is to switch the mesh voltage (referenced to ground) from 8 V to ~0 V quickly. (This will switch the electric field in the....
The Motion Sensor Switch circuit is a motion sensor controlled automatic water sprinkler but you can easily add an alarm/light function too. Before beginning the construction contact your nearest electronics component vendor and procure a readymade box-type....
When the start switch is pushed, the output of the charger goes to 14.5 V. As the batttery approaches full charge, the charging current decreases and the output voltage is reduced form 14.5V to about 12.5V, terminating the charging process. Transistor Q1....
The schematic diagram described here is a TMP01 Celsius Scale Temperature Sensor circuit. This circuit is used to convert the VPTAT output voltage that is....
It says that D1 compensates for D2`s forward drop by providing 0. 6V of bias. Is the +5V an external 5v source How does it compensate The R1, R3 and D1 basically creates a 0. 6V bias on the other side of the capacitor, so that a positive swing in the signal....
This design adopts a well established circuit topology for the power amplifier, using a single-rail supply of about 60V and capacitor-coupling for the speaker(s). The advantages for a guitar amplifier are the very simple circuitry, even for comparatively....
The SC41343 is designed as one kind of infrared, ultrasonic or RF remote control launch coding circuit. The internal circuit is composed of the sequence generator, control logic circuit?4-bit shift register?data extraction circuit and the latch circuit.....
AD7s23 is an 8-bit multiplication DA converter, the output voltage of the analog input and the digital input of the product. Inside! Unit consists of eight analog switches (cha..
This is the standard configuration on how to Interface a uC like 8051 to PC RS232 with MAX232A. The UART or Serial port was not present in 8049/8749 chips which were the ancestors of 8051/8031. Pages of code were needed to make a software UART in MCS-48. The....
This is the new and improved nixie clock using one of the smallest nixies in the world, the Russian IN-17 nixies. The clock circuit is based on revisions of the version 1 nixie clock that were used in my Single Meter Clock. The logic circuits of the clock is....
This is Micro inverter or The inverter very small-sized, perform modify from the energy battery the small-sized , have the value voltage about 220V AC Volt...
First off I should mention that this is supplemental Instructable to the countless others that show you how to build a USB charger. I am assuming you....
The SL517 is designed as the audio, RF or infrared decoder circuit that can be used in the electronic toy application. The internal circuit is composed of the analog amplifier, the frequency divider, the bistable circuit and the driver. Features It uses the....
The chart shows a function generator circuit composed of 555 timer. The circuit consists of a CH7555 timer and some transistors and RC components. It can generate triangle wave, square wave, sine wave, sawtooth and square wave sweep simultaneously. Ramp can....
Pulses from the distributor points are passed through a current limiting resistor, rectified, and clipped at 4 volts. Via Q1 and the diode pump, a dc voltage proportional to engine rpm is presented to RV1; the sharp transfer characteristic of a CMOS gate,....
An infrared remote control tester circuit that can be made without spenting much money. This IR tester build around an infrared reciever module TSOP1738. We can observe the remote control state by listening to the buzzer sound. The circuit is very sensitive....
The LMV1090 is a fully Analog dual differential input, differ- ential output, Microphone array Amplifier designed to reduce background acoustic noise, while delivering superb speech clarity in voice Communication applications. The LMV1090 preserves....
Resistance temperature sensor (RTD, resistive temperature device) comes in NTC (negative temperature coefficient) and PTC (positive temperature coefficient)....
Isolation amplifiers provide an effective method to protect IGBTs against over-current, overload and overvoltage conditions in addition to their current/voltage sensing function. Using these devices together with feature-rich gate drivers, you can implement....
Using the LM4992 stereo audio power amplifier you can design a very simple audio power amplifier electronic project, that can be used for portable electronic devices. This power audio amplifier circuit is capable of delivering 1 watt, per channel, of....
This wideband amplifier uses only five components. External signals enter pin 3 of IC1 via ac coupling capacitor Cl. Following amplification, the boosted signals from IC1 pin 1 are coupled to the output by capacitor C2. Capacitor C3 decouples the de....
By a crystal oscillator b DTL integrated circuit constituted DTL is shown by the crystal oscillator integrated circuits, and the oscillation frequency..
The circuit is built around a 555 oscillator (Ul), which is turned on when a trigger is applied by touching the touch ..
The XLR connector allows us to connect the microphone`s output to our preamplifier circuit. This preamplifier was designed and built by our Electrical Engineers using discrete components. The preamplifier`s signal is then fed to the Maxim Class-D amplifier.....
A DC motor worksby converting electricpower into mechanical work. This is accomplished by forcing current through a coil and producing a magnetic field that spins the motor. One technique to vary the speed of a DC motor is by varying the voltage on the coil.....
This triac-based 220V AC motor speed controller circuit is designed for controlling the speed of small household motors like drill machines. The speed of the motor can be controlled by changing the setting of P1. The setting of P1 determines the phase of the....
Library routines for 3-wire LCD interface based on 74HC595 shift register. More details are provided in the attached ReadMe document or posted at Do you want to unsubscribe in order to stop receiving notifications regarding "MikroC Pro for PIC driver routine....
The electronic pests killing lamp circuit consists of the oscillator, control circuit, high voltage generator, LED indicating circuit and power supply circuit, and the circuit is shown as the chart. The oscillator circuit is composed of the time-base....
In perfect discharge the batteries of lead acid, exists the fear they are destroyed. This circuit makes the work, this detection of discharge, protecting the batteries from destruction. At the discharge the polar voltage of batteries 12V of Lead acid, is not....
The following is an account of such an undertaking. Recently I was involved in a design review for a cost reduction project, where an older design was getting an update. The new design was a merging of two different designs, including someupdated parts and....
Security is a prime concern in our day-today life. Everyone wants to be as much secure as possible. An access control for doors forms a vital link in a security chain. The microcontroller based digital lock for Doors is an access control system that allows....
How would you use an SE with a chip enable? Good question and well one thing leads to another and before you know it a new solar roller is born. The design started out as a simple example of using the 1381wr SE to enable a 74AC240 chip. But with all those....
Build a Guitar Looper with an Arduino board. Here is how to produce pedalboard for electric guitar. The idea is to connect pedals to the Arduino, and to use them to control a software of sound processing in Pure Data. Here I show you the example of a....
A very simple 4 channel video amplifier electronic circuit project can be designed using NJM2582 ic suitable for video applications with SCART connector. Design of the circuit is very simple and require few external electronic parts. Some features of the....
Stepper motors are available in several versions and sizes with a variety of operating voltages. The advantage of this general-purpose controller is that is can be used with a wide range of operating voltages, from approximately 5 V to 18 V. It can drive the....
Experiments in rust electrolysis. The idea of using electricity to convert rust back into iron is not a new one, and electrolysis has been used for metal restoration by collectors and archaeologists for decades and the results can be very impressive, with....
An Astable Multivibrator is a switching circuit which switches its output on and off for a designed time period. This article also describes about its working. An Astable Multivibrator or a free running oscillator circuit is generally used to generate square....
The Maxim MAX 6665 ( provides a complete temperature-dependent fan controller. It can switch fans operating at voltages of up to 24 V and currents of up to 250 mA. The IC is available from the manufacturer in versions with preset threshold temperatures....
The noise reduction circuit is based on the observation that noise is always disturbing in intervals when music stops. It will attenuate the signal output....
Here is VU meter 10 LED circuit, This simple LED VU meter has only a few parts but it is useful as an indicator for the sound. The circuit is built around an...
Bicycle sensors provide two main purposes: to record the motion of the bicycle in order to assist with collision reconstruction, and to relay signals to the bicycle controls to keep the bicycle on course. This will pose several component requirements, as the....
The following circuit was designed by me in response to the request sent by PP. The article describes an LED emergency light circuit with advanced features such as, over charge battery cut off, day time auto-disable, and need less to say that the circuit....
The Unit is started by hand by revolving the two disks in opposite directions and continues to move without further input. This device has only two moving parts namely the bearing races at the centre of the disk. The disk are made of clear plastic upon....
A Code Practice Oscillator and that I must have built it some time ago. I had a vague recollection of the project. It certainly looked like something I might have built. There was a straight key in the same box that plugged right into the key jack. I opened....
The relay operates a certain time, td, after power is applied to it, and then it operates for a length of time, tc. The SCR fires when the voltage on Ci reaches VA. This operates the relay, which stays activated until the current charging C2 drops below the....
The ADEV Development System consists of the ATAR Target Module and the ADEV Test/Programming Module. The ATAR Target Module and the ADEV Test/Programming Module, together with development tools from Silicon Laboraties, Inc. (SL), can be used to develop....
The VFC in this circuit puts out an adequate sine-shaped output, but does not have good V-to-F linearity, and its frequency stability is not much better than 0.2%. An LM331 makes an excellent linear stable V-to-F converter, with a pulse output; Sine Wave....
Simple rectifier circuit replaces battery in vacuum-tube voltmeter. Provides good regulation and eliminates need for frequent battery replacement. Remove battery before using supply. AC source can be 6. 3-V secondary of filament transformer or terminals of....
How many times you needed some remote control to handle some electric device many times. There are lot of remote controls like infrared, RF, SMS (like my other circuit) and more. The basic small-range remote controls are 2, Infrared and RF (Radio Frequency).....
The detector is intended for the recognition of obstructions at distances of a few millimeters to a few centimeters. Similar detectors are used in the industry and health services, for instance, to open a water tap via a magnetic valve. The sensor, IC2, is a....
As shown in FIG constituted by RF2104 830MHz *** amplifier circuit works. Radio frequency (RF) signal from 5 feet input, via a preamplifier, amplified by an amplifier stage aft..
I wanted a robust, portable, compact antenna usable for horizontal and vertical polarisation to take along with my FT-817 when I go on vacation, camping etc. I also wanted the dipole to cover the VHF and UHF bands and if possible with some gain! As everybody....
The schematic diagram come from circuit: Battery Charger / Power Supply 14V / 4A with MOSFET VN64GA power supply. Go to that page to read the explanation about above power supply related circuit diagram. The following schematic is a high-performance battery....
Build a Hackduino board as explained here. Cut the speaker off of your wireless doorbell receiver. Leave as much wire connected to the receiver as yo....
DS1620 with a microprocessor to monitor temperature, by opening or closing the fan can be changed thermal conditions of the chip to achieve temperature control circuit as shown..
Here is a simple frequency counter designed to monitor the 240VAC mains supply. It as a frequency range of 0-999Hz, so it could also be used with 400Hz equipment. Standard TTL/CMOS logic is employed for the counters and display drivers, while an ELM446 (IC1)....
The article describes a simple method of making an incremental LED bar graph by using the IC 4017, which is rather equipped with specifications not suiting the present functions. Let`s learn how we can mod the IC for the operations. Here we study an easy....
This circuit can be useful to detect if the load of any battery charger or plug-in adapter supply is not properly connected. The load can be a set of batteries to be charged or any other type of battery or low dc voltage operated device. The circuit can....
Modulation is the process of changing some characteristics (e. g. amplitude, frequency or phase) of a carrier wave in accordance with the intensity of the signal is known as modulation. The figure shows the electronics circuit of a simple am modulator. It is....
A small signal amplifier, perhaps of the type to follow the previous buffer amplifier. We will assume we are buffering and amplifying our signal from the voltage controlled oscillator tutorial. In those examples we were generating and buffering 1.8 to 2.0....
The circuit use one simple, but good power supply, is enough its armor-clad by the remainder circuit, if it needs, with a aluminium, so that we avoid the noises. All the circuit can be placed in a small box, from which will only come out the RCA jack, the....
Using two op amps, this circuit produces a full-wave rectified version of the input signal. Op amp IC1 invert..
This is a very basic power failure lighting circuit based around a relay. This simple circuit has many uses, from lighting up rooms and walkways in the case of a power failure, to monitoring and security uses. There are many different power failure circuits....
Circuit shown in Figure 3-136. The line adds a limit switch SQ, when the motor is running with a mechanical device to a predetermined position, turn off the power and dynamic b..
The circuit is a simple rf-actuated switch which will respond to any strong field in the region of the pickup wire. The length of the wire will depend on how much coupling is needed, but a 250-mm length wrapped around the outside of the coaxial cable....
This simple circuit will find many applications as a battery eliminator for low power requirements. It consists of a transformer, a bridge rectifier and an electrolytic capacitor followed by a zener controlled series pass transistor. The output is stabilized....
This circuit provides a simple means to determine the voltage of a low-impedance voltage source. It works as follows. P1, which is a 1-W potentiometer, forms a voltage divider in combination with R1. The voltage at their junction is buffered by T1, and then....
Electronic calculator with automatic counting of the interface circuit shown in Figure. Figure (a) stroke switch so via optocoupler B control; Fig. (B) the use of reed KR and p..
Almost all of the audio power amplifier if using integrated circuit amplifier as circuit shown here which is use M12CLK is an power operational amplifier. It allows an output stage operating at even 2 ohms impedance and gain power 150W. For stability and....
The next stage is working with the first stage as well it is a fully-complementary. The cascode circuit is also in this place to improve linearity of the amplifiers. Cascode circuit requires a constant reference voltage biasing to make a cascode transistor....
The TBA120 Series ICs provide a high-gain limiting IF amplifier and a quadrature coincidence detector in one package. These ICs are primarily intended for extraction of TV intercarrier sound, which (in Europe) is frequency modulated onto a 5. 5MHz or 6MHz....
This is a programmable clock timer circuit that uses individual LEDs to indicate hours and minutes. 12 LEDs can be arranged in a circle to represent the 12 hours of a clock face and an additional 12 LEDs can be arranged in an outer circle to indicate 5....
This simple circuit can convert a single supply voltage, such as a battery, into a bipolar supply. Sense resistors Rl and R2 establish relative magnitudes for the resulting positive and negative voltages. Their rail-to-rail value, of course, equals....
TCA965 window discriminator IC allows the potentiometers RVl and RV2 to set up a window height and window width respectively. Rl and thermistor THl for a potential divider connected across the supply lines. Rl is chosen such that at ambient temperature the....
Digital pulse width measurement circuit is shown. It uses a l00kHz reference frequency, the count in the pulse width of the signal, the count value of the product of the resolu..
The sensors used are silicon phototransistors and Cadmium Sulfide (CdS) photocells. Both of these sensors allow less current to flow when they are dark than when lighted. Phototransistors change their conductance while photocells change their resistance....
Using a the controlled-half-plus-fixed-half-wave phase control method, this circuit can regulate an 860 a watt lamp load from half to full power. This circuit control the light output of the lamp from 30% to 100% because Half power applied to an incandescent....
Rectifier circuits based on semiconductor diodes typically handle voltage levels that greatly exceed the diodes` forward-voltage drops, which generally don`t affect the accuracy of the rectification process. However, the rectified signal`s accuracy suffers....
Copyright of this circuit belongs to smart kit electronics. In this page we will use this circuit to discuss for improvements and we will introduce some changes based on original schematic. This is an easy to build, but nevertheless very accurate and useful....
This circuit uses the 555 timer in an Astable operating mode and generates a continuous output via Pin 3 in the form of a square wave. This is then passed through the 22 ½F electrolytic capacitor to create a smooth oscillation which then creates the....
The following circuit shows about Simple Stepper Motor Controller Circuit Diagram. This circuit Based On The 7404 IC. Features: suitable heat ....
The NE602, U1, contains oscillator and mixer stages. The mixer combines the oscillator signal with the input rf signal to produce signals whose frequencies are the sum and difference of the input frequencies. For example, a 7.5-MHz signal is picked up by....
DW l11 capacitor step-down into Jenru half crossing according to Yin electrical hoof. After receiving bin CI Sh power output terminal to liVI/r j Right cut blood flow voltage, ..
This project is a FM Radio based on TDA7000 and LM386 integrated circuits. What is unusual about TDA7000 IC is how it operates. It is a proper FM superhet receiver, with the usual local oscillator, mixer, IF amplifier, limiter, and phase detector. The....
In the 20. 5X10. 5 cm rectangular piece, there is a hole of diameter 1. 5 cm to attach the motors for movement of the ROBO CAR with the help of nut and bolt system. The caster wheels used in the DTMF based ROBO CAR is made up from the cast iron material and....
Ul is an op amp used as a comparator. When the test probes are shorted together, resistors R1 and R2 bias the noninverti..
This is a design circuit for sine wave oscillators that will provide both a sine and square wave output for frequencies from below 20 Hz to above 20 KHz. The frequency of oscillation is easily tuned by varying a single resistor. This circuit is controlled by....
Using 567 IC tone decoder/detector, we can build a remote control and or intercom. This circuit can be used to control a relay, or to carry an audio signal ...
This diagram shows a redundant - closed loop ground wiring system. This is intended to reduce dependency on the frame for ground purposes in the charging circuit. The second (lower) diagram is as the bike was built using the 12 volt Alton generator and an....
This circuit reproduces the starting light sequence currently used by FISA for Formula One racing. It could be used with slot car sets (such as HO scale AFX/Life Like/Tyco sets) or radio controlled cars. IC1, a 555 timer IC, is used as a clock pulse....
