New Circuits Page 35
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Step-by-Step instructions for adding a remote control interface to F/G CED players which can be used with a variety of Atari and Sega joysticks including wireless infrared controllers....
-
This is Auto OFF Light circuit. After the switch is pressed, the bulb is kept illuminated for a few seconds. To increase the ON time, The 10k should be...
-
-
To be able to implement analog to digital conversion using the ADC0804LCN 8-bit A/D converter. You will design a circuit and program the chip so that when an analog signal is given as input, the equivalent digital voltage is displayed on an LCD display.....
-
For the 2 layer board schematic, we`ll use 6 core IC`s: 4 74LS164`s and 2 555 Timers. The schematic will be built using Eagle Layout Editor since all the parts I need exist in their library. The final schematic can be seen below, click on the picture for the....
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With the component values shown the circuit is designed to have and output voltage range of approximately 1.25 to 13.5 Volts when measured at the output of the....
-
This is a circuit diagram fuse monitor circuit indicators. This very simple circuit uses only two components, but only with a single resistor and LED this circuit provides visual indication when the fuse has blown. LED1 is usually dead, a short circuit by....
-
-
This is a simple LED blinking project using PIC16F877A. Basically there are only 2 LEDs, connected to PIC16F877A and the source code is being modified from the 16F template....
-
This application note describes the operation and features of the FAN7601. This device is a BCDMOS programmable frequency current mode PWM Controller which is designed for off-line adapter applications and auxiliary power supplies. To reduce power loss at....
-
-
Get More Information about Circuit Diagram of Mobile Jammer by visiting this link.A GSM Jammer or cell phone jammer is a device that transmit signal on the same frequency at which the GSM system operates, the jamming success when the mobile phones in the....
-
30 incandescent lightbulbs be controlled by my arduino uno on 3 channels (10 bulbs to a channel in parallel). I`ve used the arduino before to control a number of red, green and blue LEDs - I used a simple schematic using three transistors. I`m just not sure....
-
The circuit shows a two ”stage voltage amplifier driving a recording level meter. The AC signal input is amplified, rectified, and the resultant DC voltage shown on the meter. The circuit can be used with a tape recorder or audio mixer and should be fed from....
-
This joystick model was presented by IBM together with their first IBM PC computer. The joystick is just a basic analogue joystick with two buttons. The original joystick interface had circuit for connecting two joysticks, but had only one joystick....
-
Implementing peak-detector circuits is very easy with the CA3130, as shown in schematic diagram of this circuit. The figure below shows the schematic diagram of...
-
Portable battery powered USB charger circuit or schematic using IC LM7805. The circuit require only few components. ....
-
Note that I have separated the PWM Output section into the upper left corner with a heavy purple line that is bridged by the jumper JP1 on the APM2. 0. This is to emphasize that diode D1 passes current through JP1 (and drops voltage). The remaining energy is....
-
Pulse position modulation is similar to pulse width modulation, but the frequency is not constant. Like pulse width modulator circuit, pulse position....
-
Up Alarm can be used to provide a audible alarm for when the sun comes up or it can be used in a dark area and detect when a light comes on. It can also be used to detect a light b..
-
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 eq....
-
Servo motors have many uses in everything from robotics to puppetry to photography and beyond. These little motors can position their output shaft to any position on command and hold that position. Most servos have a range of motion to about 210 degrees and....
-
This is a project that I started back late 2003 when I just starting to learn PIC programming. I wanted to building something that actually did somthing us....
-
This is a programmable current and voltage regulator circuit. It consist of a voltage regulator with external current limitation. The variable resistor R2 is....
-
A Darlington would perform even better, but the circuit would be slightly more complicated. (See the schematic at bottom-right. ) Fortunately, the added complexity is inside the part! The reason for the Darlington`s superiority is that it can provide the....
-
In this circuit, four IRF510 power FETs are driven by a CMOS counter to generate the necessary two-phase drive quadrature. Although ICs are available to do this, this approach is handy for the experimenter because it uses commonly available parts. The....
-
The following diagram is the Clock Generator circuit diagram which build based on NAND Gate logic IC. You may use IC 7400 or 4011 for this circuit. The 7400 is a TTL type, while 4011 is CMOS type. IC 4011 is cheaper than 7400 but the 7400 is faster than....
-
A microprocessor based project Microprocessor-Based Home Security System . This advance security system not only let you know but also alert police immediately. In the project 8085 microprocessor based home security system we can control siren, telephone....
-
-
This part of the I2C interfacing project focuses on building an acceleration sensor, but in the process it also explores two other issues: advanced use of the PCF8591 chip (that we have already seen in the pressure sensor) and running the bus at 3. 3v. For....
-
-
Attached are 3 captures from my L297/L298 board using the same motor at 500, 750 and 900 steps/sec on a 36v supply, wired bipolar parallel (coil resistance = 3. 2ohm). This shows the A-enable signal (blue) and the sense voltage (red). The sense voltage is....
-
The first two inverters contained in IC1 are used as audio amplifiers. IC1A amplifies consistently the signal picked-up by the small electret-microphone and IC1B acts as a band-pass filter, its frequency being centered at about 1. 8KHz. The filter is....
-
-
As the potentiometer VR1 is moved toward either end, the speed increases in whichever direction it is turning. The TIP3055 Q1 NPN power transistor has a collector current specs of 15A and VCE0 of 60V DC. The MJE34 Q2 PNP power transistor has a collector....
-
Building a solid-state linear amplifier. I have an old Heathkit SB 221 that after a major overhaul and redesign is now working great on 80, 40, 20, and 15; but not 17, 12 and 10. With this in mind I got on the internet at the motel we were staying in and....
-
A small 325mW amplifier with a voltage gain of 200 that can be used as a bench amplifier, signal tracer or used to amplify the output from personal radios, etc. The circuit is based on the National Semiconductor LM386 amplifier. In the diagram above, the....
-
Communication systems using spread spectrum techniques, compare to narrow-band systems are more resistant for noises, signal fading, Doppler effect. Because of code division of signals (CDMA) we can more effective use frequency band and we can increase....
-
-
Have finished documenting/cleaning the code for my Jaycar el-cheapo Thermor/BIOS branded wireless weather station receiver. The basis for the code comes from the Practical Arduino weather station receiver project. In the end all it took was a week of....
-
-
Listen and share your music wherever you go With the mini speaker system project, you can listen to music whenever you want: your dorm, your cubicle, or at the beach. This is a great introduction to circuit systems, featuring an introductory amplifier....
-
-
This National Radio Institute radio kit covers the AM broadcast band from 550 to 1700 KHz. The set was designed to be constructed as part of a radio course taught through NRI. In contrast with some other correspondence course kits such as a later NRI....
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-
-
R1_2K2 1/4W Resistor R2_27K 1/4W Resistor R3, R4_2K2 1/2W Trimmers Cermet or Carbon (or 2K) R5_100R 1/4W Resistor R6_1K 1/4W Resistor R7, R8_330R 1/4W Resistors C1_22 µF 25V Electrolytic Capacitor C2_47pF 63V Polystyrene or Ceramic Capacitor C3, C4_100 µF....
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-
Hi All after some though and reviewing feedback, I have adjust my plans to include/remove some functions. This project has already clocked up a few....
-
The Super Charged Overdrive has been part of the Catalinbread range now for a while - as you can see above it`s had three style make overs so far (the top image showsthe SCOD`s current form. ). It`s a fairly high gain beast, and utilises those old Logic....
-
-
This circuitry is used for the joggle between computer Z RS-23 serial connecting current ring and current ring circuitry, it can transform the voltage semaphore of transmission into the current semaphore with 20 mA, the biggest speed can reach 1200 bits.....
-
This is the Sequencer circuit. Power to the Logic portion of the circuit is provided by a standard commercial "wall-wart" power adaptor supplying 6 VDC. The 555 timer IC provides the pulse train that drives the chase; the timing is adjustable with the 100K....
-
-
This solar birdhouse light is an economical circuit of a mini solar lighting system circuit is presented here. At the heart of the circuit is a mini 6V/2W solar panel. Here, this solar panel is used to charge a 4V/800mAh rechargeable battery through a charge....
-
Voicemail capacility (although not implemented, there are four ADCs that can be used to sample and record the phone audio) A storage volume (SD card) would need to be connected. This project was inspired by these other homemade exchanges: Markus Wandel and....
-
As a fully-featured Linux computer there are many external programmers that can be used with your Raspberry Pi to program the Atmel AVR range of microprocessors. It`s also possible to use the general purpose input/output lines (GPIOs) found on the Raspberry....
-
The following circuit shows about Toyota Supra Electrical Circuit Diagrams. Features: hown from the point where the power source is received from ....
-
The clock of the circuit is made of a stable oscillator built around two inverters embedded into IC1 and a Watch crystal oscillating at 32. 768kHz. This frequency is divided by 16384 by the internal flip-flop chain of IC1 and a 2Hz very stable clock....
-
-
Here is the schematic for the circuit, including the connection to the piezo hit sensor. For testing, you can connect an LED between pins 3 and 4 of the 74HC14. Giving the plexiglass plate a good smack should either light or unlight the LED (depending on....
-
Above diagram is the circuit of Lithium-ion (Li-ion) battery charger which built based single chip MAX1879. This is the simple and low cost battery charger for single-cell Li+ battery that does not dissipate power (no heat. The MAX1879, in conjunction with....
-
The eyes of the switch control system allow the microcontroller`s "brain" to know where the trains are located on the layout. This insures that only one train is on the main line at a time and that the switches are set so that the train returns to the proper....
-
-
-
This circuit was designed to allow microphone cables or other cables to be easily tested for intermittent breaks that can often be difficult to find using a multimeter. The circuit can test cables with up to four cores. Both switches used in the circuit are....
-
It requires a 15VDC adapter. An electrolyte capacitor is needed across the regulator input. If the capacitor is added in 7812`s OUT pin w. r. t. ground, then a bypass diode should be added in reverse to IN and OUT of the regulator, just to save it from....
-
The car battery charging current is automatically limited to 4. 2A. If there is a 600mV voltage on R1 (4A thru it), then the T1 transistor starts to conduct. Excessive charging current is avoided because the current value on T3 ²s base is limited. The....
-
This is very stable, harmonic free, long range fm transmitter circuit which can be used for fm frequencies between 88 and 108 MHz. This can cover 5km range (long distance). It has a very stable oscillator because you use LM7809 stabilizer which is a 9V....
-
This circuit is a Digital Radar Speedometer. It allows us to evaluate the speed of any object moving, especially cars and other vehicles. The speed is calculated in kilometers per hour (KPH). Its display has three digits. This radar works with the laser....
-
-
The following circuit shows about A Simple and Cheap Dark-Detecting LED Circuit. Features: Photoresistors are reliable, photocell or LDR, LED ....
-
AN7415 based FM stereo demodulator circuit. 1.6 to 7V operating voltage range. High gain and low distortion....
-
Measuring inductance is important in making your hand-made inductors, especially when you do-it-yourself (DIY) your coil winding. An inductance meter adapter....
-
This article shows how to implement a system that can measure arterial blood pressure values..
-
It should default on when first connected, but if a particular signal goes high for a small amount of time (say, 10 microseconds, ) then it should turn off, and stay off. It`s the "default on" that gives me trouble. The closest I can get is something like....
-
This motor overload circuit does not simply disallow overloading since it is permissible to overdrive a system but only if it is done for a short time (typically dependent on heat buildup). An overload detection circuit protects a motor against currents....
-
This be the circuit filters 10KHz low size frequencies s use IC op-amp the highly popular number uA741. By this circuit convenients for to apply to input and output of the circuit changes analog signal be digital or the circuit changes digital signal be....
-
This 9-minute timer switch can be used to control the light in a toilet or bathroom. The timer is started by pushing S1 and stopped by pushing S1 again. If you forget to turn it off, the controlled light will go off after nine minutes. If you need the light....
-
-
For making a power supply designing‚ of each and every component is essential. ‚Here I`m going to discuss the designing of ‚regulated 5V Power Supply. NOTE : Any transformer which supplies secondary peak voltage‚ up to35V can be used but as the voltage....
-
A lots of radio amateurs have an interest to power a simplest radio receivers with the "free energy", i. e. the energy, taken by the receiver antenna directly from the air. The circuits described here can provide a radio reception using a loudspeaker. The....
-
-
The Telephone project posted here is the a telephone ringer which producespleasanttunes when a call is placed to your number. The tunes produced by telephone ringer here are more melodious andsoothing compare to those of old telephone instrument and piezo....
-
The frequency counter has to count the number of cycles per second of an incoming signal. Hence we need a device to count. In electronics circuits, counter ICs are available for counting. These IC`s can count the input pulses. The count is given as coded....
-
This circuit is very similar with a car radio controlled toy with seven control functions: forward, forward-left, forward-right, backward, backward-left, backward-right, and stop. Also you can use this radio frequency circuit for some other electronic....
-
Circuit diagram is a simple parking sensors, sensing the distance between where the rear bumper of the car and obstacles behind the car. In the circuit diagram there are two parts to the scheme and the scheme for the transmitter receiver. Distance can be....
-
This DIY 12V to 220V voltage converter is build with CMOS 4047 that is the main component of this small voltage converter that transforms a 12V DC into 220V AC. 4047 is used as a astable mutivibrator, at pins 10 and 11 will have a symmetrical rectangular....
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about-face S1 momentarily. This beating acts as a alarm beating for the decade adverse (IC2) which advances by one calculation on anniversary alternating alarm beating or the advance of about-face S1. Ten presets (VR1 through VR10), set for altered ethics by....
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A portable USB hard drive is a great way to back up data but what if your USB ports are unable to supply enough juice to power the drive A modified version of the Silicon Chip Usb Power Injector is the answer. For some time now, the author has used a....
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I am going to present you fabulous Electronic project, DEVICE CONTROL USING TIMER. By using this circuit you can turn ON an appliance at a desired time for a specific time interval. You can use this concept to control the operation of a furnace or central....
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This article tries to get you some idea how to interface IR remote controllers to computer. Possible applications could be controlling your computer your TV`s remote control or controlling your VCR using computer. This circuit was posted to sci. electronics....
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Logic probe is circuit that indicates the logic state of the node of any TTL logic circuit. It will work if we must supply the probe with the same power of....
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This is design circuit of bias current compensation circuit. This circuit can operate from MW source resistances with little increase in the equivalent offset voltage. This circuit is based on LM11. This is the figure of the circuit. This is impressive....
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This circuit uses a 1458 dual op-amp to form a radar detector. C1 is the detector of the radar signal. The first op-amp forms a current-to-voltage converter and the second op-amp buffers the output to drive the piezo transducer. R5 sets the switching....
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Men in particular enjoy the convenience of television remote controls often to the annoyance of their female partners. Men apparently want to know what they re missing when the TV is tuned to a particular program, so they like to keep zapping to other....
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This is a design for the tracking transmitter of audio tone in FM band frequency. The circuit can be used a signal transmitter or remote control transmitter. The circuit is use only the available components. The range of the transmitter is 100 m in the....
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LTC6101 op-amp can be used to build High voltage current monitoring/sensing. This circuit can senses current in 500 volts system. Here is the schematic diagram....
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O The SA1021 integrated Radio receiver circuit is for portable Radios stereo as well as mono, where a minimum of periphery is important in terms of small dimensions and low cost. It is fully compatible for applications using the low-voltage micro tuning....
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Step-by-Step instructions for adding a remote control interface to F/G CED players which can be used with a variety of Atari and Sega joysticks including wireless infrared controllers....
This is Auto OFF Light circuit. After the switch is pressed, the bulb is kept illuminated for a few seconds. To increase the ON time, The 10k should be...
To be able to implement analog to digital conversion using the ADC0804LCN 8-bit A/D converter. You will design a circuit and program the chip so that when an analog signal is given as input, the equivalent digital voltage is displayed on an LCD display.....
For the 2 layer board schematic, we`ll use 6 core IC`s: 4 74LS164`s and 2 555 Timers. The schematic will be built using Eagle Layout Editor since all the parts I need exist in their library. The final schematic can be seen below, click on the picture for the....
With the component values shown the circuit is designed to have and output voltage range of approximately 1.25 to 13.5 Volts when measured at the output of the....
This is a circuit diagram fuse monitor circuit indicators. This very simple circuit uses only two components, but only with a single resistor and LED this circuit provides visual indication when the fuse has blown. LED1 is usually dead, a short circuit by....
This is a simple LED blinking project using PIC16F877A. Basically there are only 2 LEDs, connected to PIC16F877A and the source code is being modified from the 16F template....
This application note describes the operation and features of the FAN7601. This device is a BCDMOS programmable frequency current mode PWM Controller which is designed for off-line adapter applications and auxiliary power supplies. To reduce power loss at....
Get More Information about Circuit Diagram of Mobile Jammer by visiting this link.A GSM Jammer or cell phone jammer is a device that transmit signal on the same frequency at which the GSM system operates, the jamming success when the mobile phones in the....
30 incandescent lightbulbs be controlled by my arduino uno on 3 channels (10 bulbs to a channel in parallel). I`ve used the arduino before to control a number of red, green and blue LEDs - I used a simple schematic using three transistors. I`m just not sure....
The circuit shows a two ”stage voltage amplifier driving a recording level meter. The AC signal input is amplified, rectified, and the resultant DC voltage shown on the meter. The circuit can be used with a tape recorder or audio mixer and should be fed from....
This joystick model was presented by IBM together with their first IBM PC computer. The joystick is just a basic analogue joystick with two buttons. The original joystick interface had circuit for connecting two joysticks, but had only one joystick....
Implementing peak-detector circuits is very easy with the CA3130, as shown in schematic diagram of this circuit. The figure below shows the schematic diagram of...
Portable battery powered USB charger circuit or schematic using IC LM7805. The circuit require only few components. ....
Note that I have separated the PWM Output section into the upper left corner with a heavy purple line that is bridged by the jumper JP1 on the APM2. 0. This is to emphasize that diode D1 passes current through JP1 (and drops voltage). The remaining energy is....
Pulse position modulation is similar to pulse width modulation, but the frequency is not constant. Like pulse width modulator circuit, pulse position....
Up Alarm can be used to provide a audible alarm for when the sun comes up or it can be used in a dark area and detect when a light comes on. It can also be used to detect a light b..
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 eq....
Servo motors have many uses in everything from robotics to puppetry to photography and beyond. These little motors can position their output shaft to any position on command and hold that position. Most servos have a range of motion to about 210 degrees and....
This is a project that I started back late 2003 when I just starting to learn PIC programming. I wanted to building something that actually did somthing us....
This is a programmable current and voltage regulator circuit. It consist of a voltage regulator with external current limitation. The variable resistor R2 is....
A Darlington would perform even better, but the circuit would be slightly more complicated. (See the schematic at bottom-right. ) Fortunately, the added complexity is inside the part! The reason for the Darlington`s superiority is that it can provide the....
In this circuit, four IRF510 power FETs are driven by a CMOS counter to generate the necessary two-phase drive quadrature. Although ICs are available to do this, this approach is handy for the experimenter because it uses commonly available parts. The....
The following diagram is the Clock Generator circuit diagram which build based on NAND Gate logic IC. You may use IC 7400 or 4011 for this circuit. The 7400 is a TTL type, while 4011 is CMOS type. IC 4011 is cheaper than 7400 but the 7400 is faster than....
A microprocessor based project Microprocessor-Based Home Security System . This advance security system not only let you know but also alert police immediately. In the project 8085 microprocessor based home security system we can control siren, telephone....
This part of the I2C interfacing project focuses on building an acceleration sensor, but in the process it also explores two other issues: advanced use of the PCF8591 chip (that we have already seen in the pressure sensor) and running the bus at 3. 3v. For....
Attached are 3 captures from my L297/L298 board using the same motor at 500, 750 and 900 steps/sec on a 36v supply, wired bipolar parallel (coil resistance = 3. 2ohm). This shows the A-enable signal (blue) and the sense voltage (red). The sense voltage is....
The first two inverters contained in IC1 are used as audio amplifiers. IC1A amplifies consistently the signal picked-up by the small electret-microphone and IC1B acts as a band-pass filter, its frequency being centered at about 1. 8KHz. The filter is....
As the potentiometer VR1 is moved toward either end, the speed increases in whichever direction it is turning. The TIP3055 Q1 NPN power transistor has a collector current specs of 15A and VCE0 of 60V DC. The MJE34 Q2 PNP power transistor has a collector....
Building a solid-state linear amplifier. I have an old Heathkit SB 221 that after a major overhaul and redesign is now working great on 80, 40, 20, and 15; but not 17, 12 and 10. With this in mind I got on the internet at the motel we were staying in and....
A small 325mW amplifier with a voltage gain of 200 that can be used as a bench amplifier, signal tracer or used to amplify the output from personal radios, etc. The circuit is based on the National Semiconductor LM386 amplifier. In the diagram above, the....
Communication systems using spread spectrum techniques, compare to narrow-band systems are more resistant for noises, signal fading, Doppler effect. Because of code division of signals (CDMA) we can more effective use frequency band and we can increase....
Have finished documenting/cleaning the code for my Jaycar el-cheapo Thermor/BIOS branded wireless weather station receiver. The basis for the code comes from the Practical Arduino weather station receiver project. In the end all it took was a week of....
Listen and share your music wherever you go With the mini speaker system project, you can listen to music whenever you want: your dorm, your cubicle, or at the beach. This is a great introduction to circuit systems, featuring an introductory amplifier....
This National Radio Institute radio kit covers the AM broadcast band from 550 to 1700 KHz. The set was designed to be constructed as part of a radio course taught through NRI. In contrast with some other correspondence course kits such as a later NRI....
R1_2K2 1/4W Resistor R2_27K 1/4W Resistor R3, R4_2K2 1/2W Trimmers Cermet or Carbon (or 2K) R5_100R 1/4W Resistor R6_1K 1/4W Resistor R7, R8_330R 1/4W Resistors C1_22 µF 25V Electrolytic Capacitor C2_47pF 63V Polystyrene or Ceramic Capacitor C3, C4_100 µF....
Hi All after some though and reviewing feedback, I have adjust my plans to include/remove some functions. This project has already clocked up a few....
The Super Charged Overdrive has been part of the Catalinbread range now for a while - as you can see above it`s had three style make overs so far (the top image showsthe SCOD`s current form. ). It`s a fairly high gain beast, and utilises those old Logic....
This circuitry is used for the joggle between computer Z RS-23 serial connecting current ring and current ring circuitry, it can transform the voltage semaphore of transmission into the current semaphore with 20 mA, the biggest speed can reach 1200 bits.....
This is the Sequencer circuit. Power to the Logic portion of the circuit is provided by a standard commercial "wall-wart" power adaptor supplying 6 VDC. The 555 timer IC provides the pulse train that drives the chase; the timing is adjustable with the 100K....
This solar birdhouse light is an economical circuit of a mini solar lighting system circuit is presented here. At the heart of the circuit is a mini 6V/2W solar panel. Here, this solar panel is used to charge a 4V/800mAh rechargeable battery through a charge....
Voicemail capacility (although not implemented, there are four ADCs that can be used to sample and record the phone audio) A storage volume (SD card) would need to be connected. This project was inspired by these other homemade exchanges: Markus Wandel and....
As a fully-featured Linux computer there are many external programmers that can be used with your Raspberry Pi to program the Atmel AVR range of microprocessors. It`s also possible to use the general purpose input/output lines (GPIOs) found on the Raspberry....
The following circuit shows about Toyota Supra Electrical Circuit Diagrams. Features: hown from the point where the power source is received from ....
The clock of the circuit is made of a stable oscillator built around two inverters embedded into IC1 and a Watch crystal oscillating at 32. 768kHz. This frequency is divided by 16384 by the internal flip-flop chain of IC1 and a 2Hz very stable clock....
Here is the schematic for the circuit, including the connection to the piezo hit sensor. For testing, you can connect an LED between pins 3 and 4 of the 74HC14. Giving the plexiglass plate a good smack should either light or unlight the LED (depending on....
Above diagram is the circuit of Lithium-ion (Li-ion) battery charger which built based single chip MAX1879. This is the simple and low cost battery charger for single-cell Li+ battery that does not dissipate power (no heat. The MAX1879, in conjunction with....
The eyes of the switch control system allow the microcontroller`s "brain" to know where the trains are located on the layout. This insures that only one train is on the main line at a time and that the switches are set so that the train returns to the proper....
This circuit was designed to allow microphone cables or other cables to be easily tested for intermittent breaks that can often be difficult to find using a multimeter. The circuit can test cables with up to four cores. Both switches used in the circuit are....
It requires a 15VDC adapter. An electrolyte capacitor is needed across the regulator input. If the capacitor is added in 7812`s OUT pin w. r. t. ground, then a bypass diode should be added in reverse to IN and OUT of the regulator, just to save it from....
The car battery charging current is automatically limited to 4. 2A. If there is a 600mV voltage on R1 (4A thru it), then the T1 transistor starts to conduct. Excessive charging current is avoided because the current value on T3 ²s base is limited. The....
This is very stable, harmonic free, long range fm transmitter circuit which can be used for fm frequencies between 88 and 108 MHz. This can cover 5km range (long distance). It has a very stable oscillator because you use LM7809 stabilizer which is a 9V....
This circuit is a Digital Radar Speedometer. It allows us to evaluate the speed of any object moving, especially cars and other vehicles. The speed is calculated in kilometers per hour (KPH). Its display has three digits. This radar works with the laser....
The following circuit shows about A Simple and Cheap Dark-Detecting LED Circuit. Features: Photoresistors are reliable, photocell or LDR, LED ....
AN7415 based FM stereo demodulator circuit. 1.6 to 7V operating voltage range. High gain and low distortion....
Measuring inductance is important in making your hand-made inductors, especially when you do-it-yourself (DIY) your coil winding. An inductance meter adapter....
This article shows how to implement a system that can measure arterial blood pressure values..
It should default on when first connected, but if a particular signal goes high for a small amount of time (say, 10 microseconds, ) then it should turn off, and stay off. It`s the "default on" that gives me trouble. The closest I can get is something like....
This motor overload circuit does not simply disallow overloading since it is permissible to overdrive a system but only if it is done for a short time (typically dependent on heat buildup). An overload detection circuit protects a motor against currents....
This be the circuit filters 10KHz low size frequencies s use IC op-amp the highly popular number uA741. By this circuit convenients for to apply to input and output of the circuit changes analog signal be digital or the circuit changes digital signal be....
This 9-minute timer switch can be used to control the light in a toilet or bathroom. The timer is started by pushing S1 and stopped by pushing S1 again. If you forget to turn it off, the controlled light will go off after nine minutes. If you need the light....
For making a power supply designing‚ of each and every component is essential. ‚Here I`m going to discuss the designing of ‚regulated 5V Power Supply. NOTE : Any transformer which supplies secondary peak voltage‚ up to35V can be used but as the voltage....
A lots of radio amateurs have an interest to power a simplest radio receivers with the "free energy", i. e. the energy, taken by the receiver antenna directly from the air. The circuits described here can provide a radio reception using a loudspeaker. The....
The Telephone project posted here is the a telephone ringer which producespleasanttunes when a call is placed to your number. The tunes produced by telephone ringer here are more melodious andsoothing compare to those of old telephone instrument and piezo....
The frequency counter has to count the number of cycles per second of an incoming signal. Hence we need a device to count. In electronics circuits, counter ICs are available for counting. These IC`s can count the input pulses. The count is given as coded....
This circuit is very similar with a car radio controlled toy with seven control functions: forward, forward-left, forward-right, backward, backward-left, backward-right, and stop. Also you can use this radio frequency circuit for some other electronic....
Circuit diagram is a simple parking sensors, sensing the distance between where the rear bumper of the car and obstacles behind the car. In the circuit diagram there are two parts to the scheme and the scheme for the transmitter receiver. Distance can be....
This DIY 12V to 220V voltage converter is build with CMOS 4047 that is the main component of this small voltage converter that transforms a 12V DC into 220V AC. 4047 is used as a astable mutivibrator, at pins 10 and 11 will have a symmetrical rectangular....
about-face S1 momentarily. This beating acts as a alarm beating for the decade adverse (IC2) which advances by one calculation on anniversary alternating alarm beating or the advance of about-face S1. Ten presets (VR1 through VR10), set for altered ethics by....
A portable USB hard drive is a great way to back up data but what if your USB ports are unable to supply enough juice to power the drive A modified version of the Silicon Chip Usb Power Injector is the answer. For some time now, the author has used a....
I am going to present you fabulous Electronic project, DEVICE CONTROL USING TIMER. By using this circuit you can turn ON an appliance at a desired time for a specific time interval. You can use this concept to control the operation of a furnace or central....
This article tries to get you some idea how to interface IR remote controllers to computer. Possible applications could be controlling your computer your TV`s remote control or controlling your VCR using computer. This circuit was posted to sci. electronics....
Logic probe is circuit that indicates the logic state of the node of any TTL logic circuit. It will work if we must supply the probe with the same power of....
This is design circuit of bias current compensation circuit. This circuit can operate from MW source resistances with little increase in the equivalent offset voltage. This circuit is based on LM11. This is the figure of the circuit. This is impressive....
This circuit uses a 1458 dual op-amp to form a radar detector. C1 is the detector of the radar signal. The first op-amp forms a current-to-voltage converter and the second op-amp buffers the output to drive the piezo transducer. R5 sets the switching....
Men in particular enjoy the convenience of television remote controls often to the annoyance of their female partners. Men apparently want to know what they re missing when the TV is tuned to a particular program, so they like to keep zapping to other....
LTC6101 op-amp can be used to build High voltage current monitoring/sensing. This circuit can senses current in 500 volts system. Here is the schematic diagram....
O The SA1021 integrated Radio receiver circuit is for portable Radios stereo as well as mono, where a minimum of periphery is important in terms of small dimensions and low cost. It is fully compatible for applications using the low-voltage micro tuning....
