New Circuits Page 51
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The reson this was made this was, was to make first installation fast an a local freiend 10km away, so i cuold start real life testing, so bugs and problems can be solved before this is gived free to all other users. Software is not complete yet, all is....
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The 27MHz quartz crystal oscillator circuit is as shown in figure 1. The biasing circuit is composed of the R1, R2 and R3, C6 is the bypass capacitor. The partial voltage circuit is composed of the C1, C2, C3 and C4 to control the strength of oscillation. L1....
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Robot eyes circuit of Service A simple circuit to simulate a man appointed to It is a dual-lamp working in a manner UNSTEADY Circuit diagram...
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To make a battery operated LED lamp, it may better to use a cluster of low power discrete LED array rather than a single high power LED. The light produced will be scattered and It considerably reduces irritation or damages to a naked eye, if accidentally....
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-
Here the complete electrical circuit diagram of line follower robot which built based on ATmega16. There are three modules of line follower robot circuit that are sensor module, microcontroller module and DC motor module. Download thedocument of ATmega16....
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Here is a easy circuit of a DC to DC converter using LM317T IC. LM317 is a very famous IC comes in TO 220 package. This high performance IC has a lot of good features like input supporting voltage from 3 to 40 volt DC and delivers regulated output from 1. 25....
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The following circuit shows about PFC Switching Power Supply Circuit Diagram. Features: suited for 1U (1.75-inch), minimise input harmonic ....
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The circuit works like this: Normally the LED is powered dimly through R1 and R3. SW1 is the spring and wire based accelerometer I mentioned earlier. When SW1 is closed, C2 quickly charges up (at a rate defined by R2) and is discharged through R3 and the....
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the rest of the pictures show the construction of the sub. It was made out of two C channels connected by an aluminum sheet. A skid was added to the bottom to allow the sub to skate over the bottom to gather quantitative video samples of the ecology. The....
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This standalone digital thermometer controls the temperature of a device according to its requirement. It also displays the temperature on four 7-segment displays in the range of 55 to +125 °C. At the heart of the circuit is the microcontroller AT89S52,....
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A lot of electronic circuits using NE555 timer IC are already published here and this is just another one. Here is the circuit diagram of a police siren based on NE55 timer IC. The circuit uses two NE555 timers ICs and each of them are wired as astable....
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In this series I use IC tda2822M as the main amplifier, but if you want to use in addition to IC TDA2822M you can use ic I mentioned this is KA2209, NJM2073, U2822B, U2823B. Output is issued no more than 4W, which had low output. Supply voltage from 3 volts....
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This circuit is intended to signal when a plant needs water. A LED flashes at a low rate when the ground in the flower-pot is too dry, turning off when the moisture level is increasing. Adjusting R2 will allow the user to adapt the sensitivity of the circuit....
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Why have one resistor and transistor for each LED, instead of chaining the LEDs in series and controlling them with a single transistor which is controlled, in turn, by the arduino pin coming in through a single resistor I have no qualms about implementing....
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Ty- Regarding your updated drawing of the AF/PI stage: - I don`t think R45 exists? - The disk cap bypassng R44 is labeled 68NF750 10% which I assume....
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This module is an enhanced version of the D. C. mixer designed for both audio and CV mixing. It has both non-inverting (adding) and inverting (subtracting) inputs, as well as a master level control. It also features two inverting outputs, one (out2) that is....
-
Using the ISL6185 USB power controller family can be designed a very simple USB power supply electronic project that provides fully independent overcurrent (OC) fault protection for two or more USB ports. This product family consists of sixteen individual....
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This broadband frequency-upconversion mixer, which has been simulated with and without a novel linearity-enhancement circuit, is suitable for multiple-standard wireless applications from 1. 0 to 10. 6 GHz. Wireless communications products continue to support....
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LM311 is the integrated chip within reference voltage, comparator circuit, amplifier, discharge circuit, and it is easy to use. In the circuit, the output frequency f0 is....
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With this circuit you can build a very small tracking transmitter that can be tracked using a FM broadcast band radio receiver. The transmitter can be powered from any 1.5V volt battery or power supply. Transmitter has a range up to 1 mile depending on....
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The B8422 Nixie tubes were destined to end up in an alarm clock on my bedside cupboard. My house is slowly filling up with homemade clocks, only our bedroom has so far been saved from the "collateral damage" of my clock making mania. A set of romantically....
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This program is a simple Traffic Light Controller. Between start time and end time the system controls a traffic light with pedestrian self-service. Outside of this time range the yellow caution lamp is blinking. |
" "+ command -+ syntax -+ function -+
" "|....
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Many a person will might excited with siren sound the all that ever hear. Because we will hear when there is an accident emergency event. But ever suspect that....
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A very simple 5 volt switching power supply electronic circuit project can be designed using FAN302HL highly integrated PWM controller integrated circuit, that provides several features to enhance the performance of general flyback converters. The....
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Efficient automatic solar garder lights circuit with minimum components the best deal is that is completely auto and the Solar panel acts as a light detect....
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-
Every electronic gadget primarily needs a D. C, power supply to energize it. It also forms the basic requirement for any constructional project. consequently there is a need to obtain multiple voltage values for cost reduction, convenience and compact....
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The circuit can be divided into four sections: power supply, touch sensor, microcontroller, and LED driver. The touch sensor is connected to the frame....
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This is a very simple square wave generator circuit built with IC 74LS00 that can generate square signals with frequencies between 20 Hz and 1 MHz. Its stability is good enough for most applications. The output freq. is dimensioned through the RC components....
-
The MAX2385 MAX2386 LNA mixer ICs are designed for CDMA cdma2000 1x and GPs applications. The MAX2385 MAX2386 are optimized for the Japanese 832MHz to 870MHz band, and CAN also be configured for the Korean/Chinese/U. S. 869MHz to 894MHz band. To optimize....
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The RF engineer sometimes has to look for an instrument that will check a low frequency quartz crystal unit reliably and rapidly. This is a difficult piece of equipment to find and the engineer often has to consult an electronic circuits handbook for the....
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The following circuit shows about Bells Ring Generator Electronic Circuit Diagram. Features: generates a dual-tone bells ringing similar to most ....
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How to make a 1kW SRSG Tesla Coil. A Mains powered SRSG (synchronous rotary spark gap) Tesla Coil powered from a 1kVA (10mA 10kV) NST....
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Can I assume that most of the 555 chips from different manufacturers are interchangable (same pin configuration), however the programs/diagrams have pins that way just to look simpler I can always route my own weird ways on the actual chip to match the....
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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....
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Schematics circuits for guitar effects with vacuum tubes and solid state electronics. DOD R825 Compressor. DOD 908 Digital Delay. MXR Dynacomp Compressor. Fuzzface Free Electronic Circuits, Diagrams, Schematics and Projects. BBE Opto Stomp Optical Compressor....
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LEDs are rated at only 30 mA continuous, whereas this circuit runs them at around 50 mA. Not a problem for a low duty cycle with short pulses, but this circuit as you intend has a high duty cycle. Where you might run into a problem is that you`re right at....
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This RF amplifier circuit has a power output of 4 Watts at a frequency of 900 Mhz. Applying Wilkinson power dividers in the base and collector circuits of Q2 and Q3, a couple of SD1853 driver application transistor are paralleled for double the power output....
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There are times when a small servo tester for modeling comes in very useful. Everybody who regularly works with servos will know several instances when such a servo tester will come in handy. The function of a servo tester is to generate a pulsing signal....
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This stroboscope circuit uses 16 high-brightness white LEDs in a torch housing and it provides a signal output to a frequency counter to provide a rev counter display. IC1 is 555 astable multivibrator and it provides a signal to IC2, a 4046 phase lock loop.....
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The combination of the LM4651 driver IC and the LM4652 power MOSFET Class D power amplifier IC provides a high efficiency amplifier solution, suitable for self-powered speakers, subwoofers and quality car boosters. The LM 4651 is a fully integrated....
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As many or as few channels as are required can be added to the mixer. Do this by just duplicating the input "sections" which are clearly shown on the schematic. One version of this mixer I saw had 25 inputs!..
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Charging a Small NiMh Battery has devised an ingenious way of collecting energy from the air and using it for various useful purposes like for charging small 9v NiMh battery, or for making high voltages etc. The experiments are indeed very intriguing and I....
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The incoming ring is detected by transistor T1 and components wired around it. In absence of ringing voltage, transistor T1 is cut off while transistor T2 is forward biased as resistor R2 is returned to the positive supply rails. As a result collector of....
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Here is a simple circuit that can be used as a telephone status indicator. When the telephone is in use (off hook) the transistor Q1 switches ON making the red LED D2 glow. When the telephone is not in use (on hook) the Q1 turns OFF and Q2 turns ON. This....
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This project takes after the VGA-to-Scope converter by using composite video rather than VGA signals to create a display on an oscilloscope. The circuitry in the VGA-to-Scope converter has been greatly simplified; op-amp buffers and inverters were....
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I have completed this above mentioned project. People have had SMS contl on Siemens/Ericsson/and other phones but they have a modem on them, and comapratively simpler coding is needed. Older nokia fones use FBUS protocol which is their (nokia) own difficulkt....
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How many have had legitimate problems with the 555 timer? Let me guessit involved the reset line, did it not? We all know that pin 4 must be set high befo....
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1200 Watt lamp dimmer circuit The circuit is a lamp dimmer circuit that is capable of controlling up to 1200 Watts. The circuit uses the Q4015LT combination Diac and Triac 230V dimmer This is a standard circuit which can be used to adjust the brightness of....
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Circuit shows the operation of an ultrasonic motion detector. There are two transducers, one emits an ultrasonic wave and the other picks up reflections from the different objects in the area. The reflected waves arrive at the receiver in constant phase if....
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All components arranged as in the picture sequence below. Current will flow starting from the sourcevoltage and to the switch. When the switch is closed current will flow through the diode, wherediode serves as a switch is closed because it was given forward....
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This circuit allows an SPST momentary pushbutton to act as a push-on push-off switch, using a DPDT latching (bi-stable) relay. It was originally intended to allow a single pushbutton switch on the dash of a vintage car to provide a latched function. The....
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The following diagram is the battery charger schematic for 6V Gel Cell battery type. Component Parts List: R1 = 22 ohm, 1W R2 = 270 ohm R3 = 220 ohm *R4 = 715 ohm, 1% *R5 = 3. 57K, 1% *R6 = 1. 40K, 1% *R7 = 1. 47K, 1% C1 = 0. 1 F, ceramic C2 = 0. 1 F,....
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This is the circuit diagram of a combination lock electronic simple using CI LS7220. This circuit can be used to activate a relay to control (the & off) press any device when a preset combination of 4 digits. The circuit can be operated from 5V to 12V.....
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This page describes a battery tester I designed. It will characterize your batteries and save the results on an microSD card....
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One of the critical components is a pwm speed controller, so that i can finely adjust my speed rather than just having an "on" mode that runs balls to the wall. That way may be fun for a little while but I value my life. lol PWM - I bought a basic stamp....
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Make an electronic focuser to help with the astro-photography. The electronic focuser project allows accurate focussing under computer control. This is most useful for eyepiece projection astro-photography where I found that touching the focuser was enough....
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If you came here through Google, then you might have seen other circuits too for high power LED driving which consists of much parts, like inductors, op-amps, different regulator IC`s, transistor feedback networks, microcontrollers etc. Those circuits are....
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The schematic of its mixer part shows such an oscillator. The oscillator LC circuit only has two connections to the valve. It has no tap or tickler coil. Oscillations will only the occur, if the tube provides a negative resistance which compensates the....
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This electronic timer switch will ON your light for 100 seconds, OFF for another 100 seconds and ON again for 100 seconds after an hour of powering up the circuit. Good home project to build ..
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Will LC-based oscillator be able to show performance comparable to crystals in such conditions (probably in wierd variants like LC-opamp. so that any energy loss on each stage is recovered and we are getting narrower bandwidth) Look at some of the amateur....
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Switching power supply whose output voltage is appreciably lower than its input voltage has an interesting property: the current drawn by it is smaller than its output current. However, the input power (UI) is, of course, greater than the output power. There....
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The report gives the reader info related to light sensor, light photoresistor, comparator, and circuit. There are lots of information regarding detection....
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This is a 2 MHz crystal circuit using CMOS pair. This circuit is ideal for uses in digital watches and clock because this circuit has low power drain. The....
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Voice Electric (FC52) is converted to electrical signals. FC52 at cost benefits of high glucose amplifier, can amplify the audio signal. When the clapping sound when, Y the sound signal is converted to electrical signals, and add to the inverting input of....
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IC1, an Intersil ICL7106, contains an a/d converter, a 3 1/2-digit LCD driver, a clock, a voltage refer-ence, seven segment decoders, and display drivers. A similar part, the ICL7107, can be used to drive seven segment LEDs. The probe body is a five-inch....
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After some days of thinking about electronic fuel injection for a moped, ive decided to take it on. Parts come up to , and the rest is programming. ...
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The robot requires means of detecting an obstacle (or another robot) without making physical contact. This allows the robot to decide whether to avoid or to confront and investigate the obstacle depending on its programming. This is one solution and the....
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The circuit below will trickle charge a four cell pack of AA or AAA NiMH batteries. The circuit draws current from the +5v available a USB connection and pumps about 70ma of current into the battery. This should be enough current to fully charge a pack of....
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The signal is encoded as a pair of sine waves, ensuring that no frequency is a multiple of the other and the sum and difference between two frequencies does not match any single tone and that`s why DTMF sounds so ugly!T he DTMF encoder circuit show n here is....
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The LTC3531/LTC3531-3. 3/LTC3531-3 are synchronous buck-boost DC/DC converters that operate from input voltages above, below or equal to the output voltage. The topology incorporated in the ICs provides a continuous transfer through all operating modes,....
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This circuit is a 73 MHz Hallogene Lamp Radio-Controlled. The purpose of it is to control the power state of a hallogene lamp by a remote control. When we press the push botton of the remonte control, the power state of the lamp will be changed, so, if the....
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A car door differs from a calculator or a phone in that it makes sense to press more than one key at a time..
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Hi guys this is my first tutorial, I`ve just started a few months ago learning electronics (previously I`ve just knew how to program in C and Python)....
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This small transmitter uses a hartley type oscillator. Normally the capacitor in the tank circuit would connect at the base of the transistor, but at VHF the base emitter capacitance of the transistor acts as a short circuit, so in effect, it still is. The....
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This circuit is high voltage regulator which has foldback current limiter protection. This circuit uses LM10 comparator with voltage reference, and this core...
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This fm 88-108 Mhz radio amplifier is equiped with BLF 245 and can be user with a heatsink from a processor and cooler. The BLF 245 Datasheet can be dow...
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Here`s one for anyone else out there who likes to tinker; this is a fun project with a low likelihood of you destroying your unit. That said, you....
The reson this was made this was, was to make first installation fast an a local freiend 10km away, so i cuold start real life testing, so bugs and problems can be solved before this is gived free to all other users. Software is not complete yet, all is....
The 27MHz quartz crystal oscillator circuit is as shown in figure 1. The biasing circuit is composed of the R1, R2 and R3, C6 is the bypass capacitor. The partial voltage circuit is composed of the C1, C2, C3 and C4 to control the strength of oscillation. L1....
Robot eyes circuit of Service A simple circuit to simulate a man appointed to It is a dual-lamp working in a manner UNSTEADY Circuit diagram...
To make a battery operated LED lamp, it may better to use a cluster of low power discrete LED array rather than a single high power LED. The light produced will be scattered and It considerably reduces irritation or damages to a naked eye, if accidentally....
Here the complete electrical circuit diagram of line follower robot which built based on ATmega16. There are three modules of line follower robot circuit that are sensor module, microcontroller module and DC motor module. Download thedocument of ATmega16....
Here is a easy circuit of a DC to DC converter using LM317T IC. LM317 is a very famous IC comes in TO 220 package. This high performance IC has a lot of good features like input supporting voltage from 3 to 40 volt DC and delivers regulated output from 1. 25....
The following circuit shows about PFC Switching Power Supply Circuit Diagram. Features: suited for 1U (1.75-inch), minimise input harmonic ....
The circuit works like this: Normally the LED is powered dimly through R1 and R3. SW1 is the spring and wire based accelerometer I mentioned earlier. When SW1 is closed, C2 quickly charges up (at a rate defined by R2) and is discharged through R3 and the....
the rest of the pictures show the construction of the sub. It was made out of two C channels connected by an aluminum sheet. A skid was added to the bottom to allow the sub to skate over the bottom to gather quantitative video samples of the ecology. The....
This standalone digital thermometer controls the temperature of a device according to its requirement. It also displays the temperature on four 7-segment displays in the range of 55 to +125 °C. At the heart of the circuit is the microcontroller AT89S52,....
A lot of electronic circuits using NE555 timer IC are already published here and this is just another one. Here is the circuit diagram of a police siren based on NE55 timer IC. The circuit uses two NE555 timers ICs and each of them are wired as astable....
In this series I use IC tda2822M as the main amplifier, but if you want to use in addition to IC TDA2822M you can use ic I mentioned this is KA2209, NJM2073, U2822B, U2823B. Output is issued no more than 4W, which had low output. Supply voltage from 3 volts....
This circuit is intended to signal when a plant needs water. A LED flashes at a low rate when the ground in the flower-pot is too dry, turning off when the moisture level is increasing. Adjusting R2 will allow the user to adapt the sensitivity of the circuit....
Why have one resistor and transistor for each LED, instead of chaining the LEDs in series and controlling them with a single transistor which is controlled, in turn, by the arduino pin coming in through a single resistor I have no qualms about implementing....
Ty- Regarding your updated drawing of the AF/PI stage: - I don`t think R45 exists? - The disk cap bypassng R44 is labeled 68NF750 10% which I assume....
This module is an enhanced version of the D. C. mixer designed for both audio and CV mixing. It has both non-inverting (adding) and inverting (subtracting) inputs, as well as a master level control. It also features two inverting outputs, one (out2) that is....
Using the ISL6185 USB power controller family can be designed a very simple USB power supply electronic project that provides fully independent overcurrent (OC) fault protection for two or more USB ports. This product family consists of sixteen individual....
This broadband frequency-upconversion mixer, which has been simulated with and without a novel linearity-enhancement circuit, is suitable for multiple-standard wireless applications from 1. 0 to 10. 6 GHz. Wireless communications products continue to support....
LM311 is the integrated chip within reference voltage, comparator circuit, amplifier, discharge circuit, and it is easy to use. In the circuit, the output frequency f0 is....
With this circuit you can build a very small tracking transmitter that can be tracked using a FM broadcast band radio receiver. The transmitter can be powered from any 1.5V volt battery or power supply. Transmitter has a range up to 1 mile depending on....
The B8422 Nixie tubes were destined to end up in an alarm clock on my bedside cupboard. My house is slowly filling up with homemade clocks, only our bedroom has so far been saved from the "collateral damage" of my clock making mania. A set of romantically....
This program is a simple Traffic Light Controller. Between start time and end time the system controls a traffic light with pedestrian self-service. Outside of this time range the yellow caution lamp is blinking. | " "+ command -+ syntax -+ function -+ " "|....
Many a person will might excited with siren sound the all that ever hear. Because we will hear when there is an accident emergency event. But ever suspect that....
A very simple 5 volt switching power supply electronic circuit project can be designed using FAN302HL highly integrated PWM controller integrated circuit, that provides several features to enhance the performance of general flyback converters. The....
Efficient automatic solar garder lights circuit with minimum components the best deal is that is completely auto and the Solar panel acts as a light detect....
Every electronic gadget primarily needs a D. C, power supply to energize it. It also forms the basic requirement for any constructional project. consequently there is a need to obtain multiple voltage values for cost reduction, convenience and compact....
The circuit can be divided into four sections: power supply, touch sensor, microcontroller, and LED driver. The touch sensor is connected to the frame....
This is a very simple square wave generator circuit built with IC 74LS00 that can generate square signals with frequencies between 20 Hz and 1 MHz. Its stability is good enough for most applications. The output freq. is dimensioned through the RC components....
The MAX2385 MAX2386 LNA mixer ICs are designed for CDMA cdma2000 1x and GPs applications. The MAX2385 MAX2386 are optimized for the Japanese 832MHz to 870MHz band, and CAN also be configured for the Korean/Chinese/U. S. 869MHz to 894MHz band. To optimize....
The RF engineer sometimes has to look for an instrument that will check a low frequency quartz crystal unit reliably and rapidly. This is a difficult piece of equipment to find and the engineer often has to consult an electronic circuits handbook for the....
The following circuit shows about Bells Ring Generator Electronic Circuit Diagram. Features: generates a dual-tone bells ringing similar to most ....
How to make a 1kW SRSG Tesla Coil. A Mains powered SRSG (synchronous rotary spark gap) Tesla Coil powered from a 1kVA (10mA 10kV) NST....
Can I assume that most of the 555 chips from different manufacturers are interchangable (same pin configuration), however the programs/diagrams have pins that way just to look simpler I can always route my own weird ways on the actual chip to match 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....
Schematics circuits for guitar effects with vacuum tubes and solid state electronics. DOD R825 Compressor. DOD 908 Digital Delay. MXR Dynacomp Compressor. Fuzzface Free Electronic Circuits, Diagrams, Schematics and Projects. BBE Opto Stomp Optical Compressor....
LEDs are rated at only 30 mA continuous, whereas this circuit runs them at around 50 mA. Not a problem for a low duty cycle with short pulses, but this circuit as you intend has a high duty cycle. Where you might run into a problem is that you`re right at....
This RF amplifier circuit has a power output of 4 Watts at a frequency of 900 Mhz. Applying Wilkinson power dividers in the base and collector circuits of Q2 and Q3, a couple of SD1853 driver application transistor are paralleled for double the power output....
There are times when a small servo tester for modeling comes in very useful. Everybody who regularly works with servos will know several instances when such a servo tester will come in handy. The function of a servo tester is to generate a pulsing signal....
This stroboscope circuit uses 16 high-brightness white LEDs in a torch housing and it provides a signal output to a frequency counter to provide a rev counter display. IC1 is 555 astable multivibrator and it provides a signal to IC2, a 4046 phase lock loop.....
The combination of the LM4651 driver IC and the LM4652 power MOSFET Class D power amplifier IC provides a high efficiency amplifier solution, suitable for self-powered speakers, subwoofers and quality car boosters. The LM 4651 is a fully integrated....
As many or as few channels as are required can be added to the mixer. Do this by just duplicating the input "sections" which are clearly shown on the schematic. One version of this mixer I saw had 25 inputs!...jpg "charging small nimh battery from air by")
Charging a Small NiMh Battery has devised an ingenious way of collecting energy from the air and using it for various useful purposes like for charging small 9v NiMh battery, or for making high voltages etc. The experiments are indeed very intriguing and I....
The incoming ring is detected by transistor T1 and components wired around it. In absence of ringing voltage, transistor T1 is cut off while transistor T2 is forward biased as resistor R2 is returned to the positive supply rails. As a result collector of....
Here is a simple circuit that can be used as a telephone status indicator. When the telephone is in use (off hook) the transistor Q1 switches ON making the red LED D2 glow. When the telephone is not in use (on hook) the Q1 turns OFF and Q2 turns ON. This....
This project takes after the VGA-to-Scope converter by using composite video rather than VGA signals to create a display on an oscilloscope. The circuitry in the VGA-to-Scope converter has been greatly simplified; op-amp buffers and inverters were....
I have completed this above mentioned project. People have had SMS contl on Siemens/Ericsson/and other phones but they have a modem on them, and comapratively simpler coding is needed. Older nokia fones use FBUS protocol which is their (nokia) own difficulkt....
How many have had legitimate problems with the 555 timer? Let me guessit involved the reset line, did it not? We all know that pin 4 must be set high befo....
1200 Watt lamp dimmer circuit The circuit is a lamp dimmer circuit that is capable of controlling up to 1200 Watts. The circuit uses the Q4015LT combination Diac and Triac 230V dimmer This is a standard circuit which can be used to adjust the brightness of....
Circuit shows the operation of an ultrasonic motion detector. There are two transducers, one emits an ultrasonic wave and the other picks up reflections from the different objects in the area. The reflected waves arrive at the receiver in constant phase if....
All components arranged as in the picture sequence below. Current will flow starting from the sourcevoltage and to the switch. When the switch is closed current will flow through the diode, wherediode serves as a switch is closed because it was given forward....
This circuit allows an SPST momentary pushbutton to act as a push-on push-off switch, using a DPDT latching (bi-stable) relay. It was originally intended to allow a single pushbutton switch on the dash of a vintage car to provide a latched function. The....
The following diagram is the battery charger schematic for 6V Gel Cell battery type. Component Parts List: R1 = 22 ohm, 1W R2 = 270 ohm R3 = 220 ohm *R4 = 715 ohm, 1% *R5 = 3. 57K, 1% *R6 = 1. 40K, 1% *R7 = 1. 47K, 1% C1 = 0. 1 F, ceramic C2 = 0. 1 F,....
This is the circuit diagram of a combination lock electronic simple using CI LS7220. This circuit can be used to activate a relay to control (the & off) press any device when a preset combination of 4 digits. The circuit can be operated from 5V to 12V.....
This page describes a battery tester I designed. It will characterize your batteries and save the results on an microSD card....
One of the critical components is a pwm speed controller, so that i can finely adjust my speed rather than just having an "on" mode that runs balls to the wall. That way may be fun for a little while but I value my life. lol PWM - I bought a basic stamp....
Make an electronic focuser to help with the astro-photography. The electronic focuser project allows accurate focussing under computer control. This is most useful for eyepiece projection astro-photography where I found that touching the focuser was enough....
If you came here through Google, then you might have seen other circuits too for high power LED driving which consists of much parts, like inductors, op-amps, different regulator IC`s, transistor feedback networks, microcontrollers etc. Those circuits are....
The schematic of its mixer part shows such an oscillator. The oscillator LC circuit only has two connections to the valve. It has no tap or tickler coil. Oscillations will only the occur, if the tube provides a negative resistance which compensates the....
This electronic timer switch will ON your light for 100 seconds, OFF for another 100 seconds and ON again for 100 seconds after an hour of powering up the circuit. Good home project to build ..
Will LC-based oscillator be able to show performance comparable to crystals in such conditions (probably in wierd variants like LC-opamp. so that any energy loss on each stage is recovered and we are getting narrower bandwidth) Look at some of the amateur....
Switching power supply whose output voltage is appreciably lower than its input voltage has an interesting property: the current drawn by it is smaller than its output current. However, the input power (UI) is, of course, greater than the output power. There....
The report gives the reader info related to light sensor, light photoresistor, comparator, and circuit. There are lots of information regarding detection....
This is a 2 MHz crystal circuit using CMOS pair. This circuit is ideal for uses in digital watches and clock because this circuit has low power drain. The....
Voice Electric (FC52) is converted to electrical signals. FC52 at cost benefits of high glucose amplifier, can amplify the audio signal. When the clapping sound when, Y the sound signal is converted to electrical signals, and add to the inverting input of....
IC1, an Intersil ICL7106, contains an a/d converter, a 3 1/2-digit LCD driver, a clock, a voltage refer-ence, seven segment decoders, and display drivers. A similar part, the ICL7107, can be used to drive seven segment LEDs. The probe body is a five-inch....
After some days of thinking about electronic fuel injection for a moped, ive decided to take it on. Parts come up to , and the rest is programming. ...
The robot requires means of detecting an obstacle (or another robot) without making physical contact. This allows the robot to decide whether to avoid or to confront and investigate the obstacle depending on its programming. This is one solution and the....
The circuit below will trickle charge a four cell pack of AA or AAA NiMH batteries. The circuit draws current from the +5v available a USB connection and pumps about 70ma of current into the battery. This should be enough current to fully charge a pack of....
The signal is encoded as a pair of sine waves, ensuring that no frequency is a multiple of the other and the sum and difference between two frequencies does not match any single tone and that`s why DTMF sounds so ugly!T he DTMF encoder circuit show n here is....
The LTC3531/LTC3531-3. 3/LTC3531-3 are synchronous buck-boost DC/DC converters that operate from input voltages above, below or equal to the output voltage. The topology incorporated in the ICs provides a continuous transfer through all operating modes,....
This circuit is a 73 MHz Hallogene Lamp Radio-Controlled. The purpose of it is to control the power state of a hallogene lamp by a remote control. When we press the push botton of the remonte control, the power state of the lamp will be changed, so, if the....
A car door differs from a calculator or a phone in that it makes sense to press more than one key at a time..
Hi guys this is my first tutorial, I`ve just started a few months ago learning electronics (previously I`ve just knew how to program in C and Python)....
This small transmitter uses a hartley type oscillator. Normally the capacitor in the tank circuit would connect at the base of the transistor, but at VHF the base emitter capacitance of the transistor acts as a short circuit, so in effect, it still is. The....
This circuit is high voltage regulator which has foldback current limiter protection. This circuit uses LM10 comparator with voltage reference, and this core...
This fm 88-108 Mhz radio amplifier is equiped with BLF 245 and can be user with a heatsink from a processor and cooler. The BLF 245 Datasheet can be dow...
Here`s one for anyone else out there who likes to tinker; this is a fun project with a low likelihood of you destroying your unit. That said, you....
