New Circuits Page 179
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This is a design circuit for temperature relay that can be used to signal a fire or set point for temperature monitoring function. You need to adjust P1 so that T1?s base voltage is 0.5V smaller than the emitter voltage at a temperature a little bit....
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-
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The single line diagram is circuit diagram where "one-line" is shown to represent three phases of a three phase power system. In addition to showing the ratings and size of electrical equipment and circuit conductors, a properly drawn one-line diagram will....
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-
-
-
This is a simple yet effective darkness activator. It uses an LDR to detect the light and when no light is present, it will sound an alarm from a cheap 8Ohm speaker. This circuit can be easily converted to a light detector by simply adding an inverting....
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-
-
-
This ridiculous hat is one of my typical procrastination projects. During swatvac for my final exams I got invited to a friends hat themed Birthday party. With nothing better to do (well apart from study for my exams) I decided that I wanted to win the best....
-
-
Portable radios, CD-players and cassette recorders that can also be operated from mains power often do not have a mains power switch, but instead are swit....
-
This document describes a Rife Beam-Ray system which was designed and constructed using the latest information available about Royal Rife`s actual frequencies. This system uses a novel method of generating the proper modulation frequency for the 3. 1 MHz....
-
Electronic Coin Toss Circuit Diagram This is electronic coin toss circuit using one CD4049 IC (Hex inverting buffer and TTL driver). This IC....
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This intelligent electronic lock circuit is built using transistors only. To open this electronic lock, one has to press tactile switches S1 through S4 sequentially. For deception you may annotate these switches with different numbers on the control....
-
Simple FM Transmitter Circuit This simple FM transmitter circuit was built using a transistor with a transmission distance of about 300m around your home. It`s...
-
Here is an efficient 4-stage stabilised power supply unit for testing electronic circuits. It provides well regulated and stabilised output, which is essential for most electronic circuits to give proper results. The circuit provides an audio-visual....
-
This is the Sawtooth Wave Generator circuit diagram with the detailed explanation of its working principles. The electronic circuit simulator helps you to design the Sawtooth Wave Generator circuit and to simulate it online for better understanding....
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The benefit of LED is longer lifetime than incandescent lamp, and even higher efficiency in latest LED technology. LED is also very compact, but unfortunately...
-
This 555 timer circuit temperature monitoring system electronic project can be monitor temperature in up to four points. Using this 555 timer circuit temperature monitoring system electronic project can be choose if the alarm should be triggered when....
-
Sometimes, in linear equipment design, it`s necessary to take a voltage which is referred to some dc level and generate an amplified output which is referred....
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-
The schematic for this project isn`t too, too bad to look at even though it`s not the best drawing/layout for a schematic that I`ve ever done. The basic flow is from left to right. Left side is the state machine, then the 555 timers, then counter circuitry....
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Your address bits in the encoder are floating, while those are connected to ground in the decoder. Do the same in the encoder also. Also note that when the keys in the transmission circuit are open, your input bits are floating, So pull up D0 to D3 of the....
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This electronic circuit uses a 555 timer as the bases of the touch switch. You can learn more about 555 timers in the Learning section on my site. When the plate is touched the 555 timer is triggered and the output on pin 3 goes high turning on the LED and....
-
-
This is a single zone alarm - with independently adjustable Exit, Entry and Siren Cut-Off timers. It will accommodate the usual types of normally-closed input devices - such as magnetic-reed contacts, foil tape and PIRs. If you wish - you can use a mains....
-
-
This circuit enables observation of movement between other stroboscopes. Generation of rectangular signal is based on NE555. This circuit requires a low power supply that is made from a simple transformer TR1, traditional rectifier bridge and zener diode.....
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This is a simple NiCd battery charger powered by solar cells. A solar cell panel or an array of solar cells can charge a battery at more than 80 % efficie....
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To complement the 60 Watt MosFet Audio Amplifier a High Quality Preamplifier design was necessary. A discrete components topology, using and - 24V supply rails was chosen, keeping the transistor count to the minimum, but still allowing low noise, very low....
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-
-
The circuit is based on the grid-dip or absorption effect, which occurs when a parallel resonant circuit is coupled to an oscillator of the same frequency. Q1 operates in a conventional Colpitts oscillator circuit at a ftxed frequency of approximately 4 MHz.....
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-
An Arduino measuring the rotational speed of a basic computer fan. It was one of a number of YouTube videos I did as I was studying for a Masters in Computer Science. This particular module was an embedded systems programming course, with a bit of....
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Two NPN transistors - models 2N2222 or 2N3403 recommended. Larger "power" transistors may not exhibit the same behavior at these low current levels. However, any pair of identical NPN transistors may be used to build a current mirror. Beware that not all....
-
Here is a white-LED-based emergency light that offers the following advantages. 1-It is highly bright due to the use of white LEDs. 2-The light turns on automatically when mains supply fails, and turns off when mains power resumes. 3-It has its own battery....
-
Neither term describes a regulator, only its placement within a circuit or system. Any voltage regulator could meet the requirements, depending on its placement. A listing of Analog Voltage Regulator IC manufacturers. The types of products or devices they....
-
This project is intended to support a simple course in which a student builds a simple AVR/Arduino based badge - a beginner`s soldering project producing a simple object with blinky lights that can be hung around the neck from a lanyard or pinned to a jacket....
-
-
Using high voltage transistors can be designed a DC power supply that can provide a supply voltage between 10 and 300 volts which can be adjusted with the potentiometer P1. Transformers typically used in such sources have several windings of high voltage and....
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Crystal X1 is fundamental mode, calibrated for parallel resonance with a 32 pF load. The final output frequency is generated by frequency multiplication within the MC2833 IC. The RF output Buffer (Pin 14) and Q2 Transistor are used as a frequency tripler and....
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Hi everyone, I`ve been looking at the ""proper"" voltages for charging, and especially at this....
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Voltage splitter using op-amp uA741 IC, circuit diagram, working, description....
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ICs have largely replaced circuits such as this, this circuit still finds use where the flexibility of a discrete device design is desirabe. Parts are easy to obtain and the problem of IC obsolescense is eliminated. The TIP31A can be heatsinked to a small....
-
1Hz Clock Generator Circuit with Chip On Board (COB). The COBs used in different watches may differ somewhat in their configuration. But by trial-and error one can always find out the appropriate points corresponding to points A, B, C and D. This is the 1Hz....
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This circuit is a differential analog circuit switches. The FM1208 monolithic dual differential multiplexer used in applications where the RDS (ON) must be the same match. Since RDS (ON) for monolithic dual tracks at better than 1% of the broad temperature....
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-
-
This application note includes a brief overview of power amplifier theory and it includes simulation results that provide insight into the operation of the power amplifier on all of MAXIM s LFRF transmitters and transceivers....
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-
-
-
Electronics Tutorial about Combinational Logic Circuits that use Logic Gates to make Multiplexers, Encoders and Solid State Switches....
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The SA1140 is an IF system IC designed for FM car stereo receivers. It features versatile muting characteristics which CAN be varied with external parts. By Silan ..
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Telephone electronic coded lock circuit is shown as above,the electronic coded lock is suitable for double audio circuits.After the phone adds this coded lock, when you call out,you must use the buttons on the phone to press the four pre-programmed....
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To build the circuit, attach a 220-ohm resistor to pin 13. Then attach the long leg of an LED (the positive leg, called the anode) to the resistor. Attach the short leg (the negative leg, called the cathode) to ground. Then plug your Arduino board into your....
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The receiver is built on a single-sided printed circuit board which measures 2 by 4. 3 inches. The small size means that the board can be fitted into a wide variety of enclosures, which should be well screened. The main directional signal is picked up by a....
-
A Pierce Oscillator is a type of oscillator that uses a crystal instead of a parallel-resonant circuit [LC circuit]. A pierce oscillator also uses the voltage developed from a tap between two capacitors in the tank circuit, as shown to the right. range. Both....
-
Q1, Q2 & Q3 form a high impedance super-Darlington that drives the relay, amplifying the 50 or 60Hz alternate mains-supply frequency induced in the sensor by the human body. C1, D2 & D3 ensure a clean switching of the relay. Power supply can be any....
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A 12V 20W halogen lamp (MR16) and a 4. 2Ah SLA battery for my bike light system. The battery has only limited life at this power rating, so I designed this cheap light dimmer to reduce the battery drain and allow for longer rides at night. Based on a simple....
-
Stabilized voltage inverter 12V-220V 200W is shown in the following diagram. It can adopt existing dual 12V-200W mains transformer. But its invert efficiency is low....
-
The Analog Devices ACP3610 is a voltage doubler that works with a switched-capacitor converter, using the push-pull principle. The switching frequency at the output is approximately 550 kHz. The term push-pull` refers to the two charge pumps, which work in....
-
My JD mower, for quite awhile now, has been very erratic at starting. Sometimes the starter will activate, but more often it will not. Yet after a long wait it will sometimes start. I found a tip on the internet, recommending puting a relay in the circuit.....
-
-
For the most part we live in an analog world and when using a microcontroller, it is often necessary to be able to convert a digital value into its analog equivalent (or, for that matter, an analog value to a digital value but that`s not what this post is....
-
-
Using a 555 with perhaps a 4029, and I would add a 4511, then connect the pins (using resistors of course), of the bargraph leds, to "a-g" pins of the 4511. To top it all off the graphs I received are all common anode, which is a pain because I`m not too....
-
This is a high fidelity external USB Soundcard / USB Headphones project that can be built for your PC or Mac. It is based on the latest PCM2706 IC which functions as a high quality, crystal clear 16-BIT Stereo DAC. It is a single chip digital-to-analog....
-
The MAXQ3210 ia a powerful RISC microcontroller. This device have features and capabilities to make it compatible for battery-powered applications that detect....
-
The diagrams below detail the development of a simple modular radio receiver based entirely on circuits and devices studied during the Part IA course on Linear Circuits and Devices. This receiver may not take the market by storm! However, we hope it will....
-
Anyone experimenting or developing USB ported peripheral hardware soon be comes irritated by the need to disconnect and connect the plug in order to reestablish communication with the PC. This process is necessary for example each time the peripheral....
-
Interested in starting an intro electronics project using a IR sensor and am having a little trouble understand the application circuit given on the datasheet of the circuit. The value of resistor they recommend using is far less then the one I calculate I....
-
-
A unit which is often very useful, if we need to isolate, in sound circuits, two stage between them. Then we can use this circuit which has an amplified unit, which gain X1, we do not use total negative feedback, only local, with the result that distortion....
-
Five uses tri-state audio logic pen (CD4066, 555) circuit diagram is shown as the chart. The circuit is mainly composed of the multivibrator, the four-way switch CD4066 (IC1) and the gate circuit composed of some RC components. Multivibrator is composed of....
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A simple test circuit to fault find audio and radio equipment. Can be used to inject a square wave signal, rich in harmonics, or used with headphones as an audio tracer. A single pole double throw sitch is used to switch between inject and trace modes. The....
-
Adjustable 5A Step Down 5 MHz switching regulator circuit can also be used to overcome such problem. It uses ST1S03 step down DC-DC converter.The ST1S03 can also be used to power low-voltage digital core in HDD application. With input voltage range 3V to....
-
This is a light dimmer circuit. It has no fancy special feature, it is a a quite typical TRIAC based dimmer circuit. This circuit is only used to operate with....
-
this project use PIC18F25K20 microcontroller to detect if the sensor change state and it will emit a sound from the speaker or piezo, the MCU also detect the voltage of the battery in the startup, the algorithm it s very simple use an interrupt on change to....
-
The microcontroller (MCU) is responsible for sending variable voltages over time (just like a traditional LFO) to an effect that can be modulated by a voltage, or a pot on a traditional analog effect that can be replaced with an optoisolator/vactrol. Here`s....
-
Building battery boxes for the Speedster. While not an exciting topic, in converting almost any car to electric drive, most new builders are surprised to learn that making the car run on battery power is almost trivial. But 50% of the work centers on placing....
-
The following diagram is the circuit diagram of 20 band stereo graphic equaliser which will controlling the audio signal in specific frequency range. This circuit must be connected before the amplifier circuit. For maximum performance, you....
-
-
In the circuit below, a quad voltage comparator (LM339) is used as a simple bar graph meter to indicate the charge condition of a 12 volt, lead acid battery. A 5 volt reference voltage is connected to each of the (+) inputs of the four comparators and the....
-
The circuit was designed to produce a circuit that will alarm a sleeping person to prevent snoring by using a vibrator instead of an audio alert so as not....
-
This is a simple design of audio level meter. This circuit uses just one IC and a very few number of external components. This circuit is based on LM3915 as controller in the operation of the audio level meter circuit. It displays the audio level in terms of....
-
The MIDI Bass Pedal uses the MIDI keyboard encoder (MKE), which is capable of encoding any number of momentary action, push to make, single pole single throw (SPST), switches from 1 up to 128 to produce the equivalent MIDI note-on/note-off data commands. The....
-
-
A simple Water level indicator project with circuit diagram for home and industry.This water tank level sensor can be used for any liquid level indicator projects....
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-
-
This infrared alarm barrier can be used to detect persons passing through doorways, corridors and small gates. The transmitter emits a beam of infrared light which is invisible to the human eye. The buzzer at the output of the receiver is activated when the....
-
-
When mains is absent, relay RL2 is in deenergised state, feeding battery supply to inverter section via its N/ C contacts and switch S1. The inverter section comprises IC2 (NE555) which is used in stable mode to produce sharp pulses at the rate of 50 Hz for....
-
Lately The Peasant has been building a music synthesizer using vacuum tubes. Although this will be used as a percussion synthesizer, it could just as easily be controlled by a keyboard or a MIDI to CV convertor. The first module built is a dual VCO. It is....
-
Basically, you would need a regulator circuitry. Since this involves DIY (do-it-yourself) project, it is required to be familiar with electronic components & circuitry, use of a multitester and a soldering iron. The schematic diagram below would take in any....
This is a design circuit for temperature relay that can be used to signal a fire or set point for temperature monitoring function. You need to adjust P1 so that T1?s base voltage is 0.5V smaller than the emitter voltage at a temperature a little bit....
The single line diagram is circuit diagram where "one-line" is shown to represent three phases of a three phase power system. In addition to showing the ratings and size of electrical equipment and circuit conductors, a properly drawn one-line diagram will....
This is a simple yet effective darkness activator. It uses an LDR to detect the light and when no light is present, it will sound an alarm from a cheap 8Ohm speaker. This circuit can be easily converted to a light detector by simply adding an inverting....
This ridiculous hat is one of my typical procrastination projects. During swatvac for my final exams I got invited to a friends hat themed Birthday party. With nothing better to do (well apart from study for my exams) I decided that I wanted to win the best....
Portable radios, CD-players and cassette recorders that can also be operated from mains power often do not have a mains power switch, but instead are swit....
This document describes a Rife Beam-Ray system which was designed and constructed using the latest information available about Royal Rife`s actual frequencies. This system uses a novel method of generating the proper modulation frequency for the 3. 1 MHz....
Electronic Coin Toss Circuit Diagram This is electronic coin toss circuit using one CD4049 IC (Hex inverting buffer and TTL driver). This IC....
This intelligent electronic lock circuit is built using transistors only. To open this electronic lock, one has to press tactile switches S1 through S4 sequentially. For deception you may annotate these switches with different numbers on the control....
Simple FM Transmitter Circuit This simple FM transmitter circuit was built using a transistor with a transmission distance of about 300m around your home. It`s...
Here is an efficient 4-stage stabilised power supply unit for testing electronic circuits. It provides well regulated and stabilised output, which is essential for most electronic circuits to give proper results. The circuit provides an audio-visual....
This is the Sawtooth Wave Generator circuit diagram with the detailed explanation of its working principles. The electronic circuit simulator helps you to design the Sawtooth Wave Generator circuit and to simulate it online for better understanding....
The benefit of LED is longer lifetime than incandescent lamp, and even higher efficiency in latest LED technology. LED is also very compact, but unfortunately...
This 555 timer circuit temperature monitoring system electronic project can be monitor temperature in up to four points. Using this 555 timer circuit temperature monitoring system electronic project can be choose if the alarm should be triggered when....
Sometimes, in linear equipment design, it`s necessary to take a voltage which is referred to some dc level and generate an amplified output which is referred....
The schematic for this project isn`t too, too bad to look at even though it`s not the best drawing/layout for a schematic that I`ve ever done. The basic flow is from left to right. Left side is the state machine, then the 555 timers, then counter circuitry....
Your address bits in the encoder are floating, while those are connected to ground in the decoder. Do the same in the encoder also. Also note that when the keys in the transmission circuit are open, your input bits are floating, So pull up D0 to D3 of the....
This electronic circuit uses a 555 timer as the bases of the touch switch. You can learn more about 555 timers in the Learning section on my site. When the plate is touched the 555 timer is triggered and the output on pin 3 goes high turning on the LED and....
This is a single zone alarm - with independently adjustable Exit, Entry and Siren Cut-Off timers. It will accommodate the usual types of normally-closed input devices - such as magnetic-reed contacts, foil tape and PIRs. If you wish - you can use a mains....
This circuit enables observation of movement between other stroboscopes. Generation of rectangular signal is based on NE555. This circuit requires a low power supply that is made from a simple transformer TR1, traditional rectifier bridge and zener diode.....
This is a simple NiCd battery charger powered by solar cells. A solar cell panel or an array of solar cells can charge a battery at more than 80 % efficie....
To complement the 60 Watt MosFet Audio Amplifier a High Quality Preamplifier design was necessary. A discrete components topology, using and - 24V supply rails was chosen, keeping the transistor count to the minimum, but still allowing low noise, very low....
The circuit is based on the grid-dip or absorption effect, which occurs when a parallel resonant circuit is coupled to an oscillator of the same frequency. Q1 operates in a conventional Colpitts oscillator circuit at a ftxed frequency of approximately 4 MHz.....
An Arduino measuring the rotational speed of a basic computer fan. It was one of a number of YouTube videos I did as I was studying for a Masters in Computer Science. This particular module was an embedded systems programming course, with a bit of....
Two NPN transistors - models 2N2222 or 2N3403 recommended. Larger "power" transistors may not exhibit the same behavior at these low current levels. However, any pair of identical NPN transistors may be used to build a current mirror. Beware that not all....
Here is a white-LED-based emergency light that offers the following advantages. 1-It is highly bright due to the use of white LEDs. 2-The light turns on automatically when mains supply fails, and turns off when mains power resumes. 3-It has its own battery....
Neither term describes a regulator, only its placement within a circuit or system. Any voltage regulator could meet the requirements, depending on its placement. A listing of Analog Voltage Regulator IC manufacturers. The types of products or devices they....
This project is intended to support a simple course in which a student builds a simple AVR/Arduino based badge - a beginner`s soldering project producing a simple object with blinky lights that can be hung around the neck from a lanyard or pinned to a jacket....
Using high voltage transistors can be designed a DC power supply that can provide a supply voltage between 10 and 300 volts which can be adjusted with the potentiometer P1. Transformers typically used in such sources have several windings of high voltage and....
Crystal X1 is fundamental mode, calibrated for parallel resonance with a 32 pF load. The final output frequency is generated by frequency multiplication within the MC2833 IC. The RF output Buffer (Pin 14) and Q2 Transistor are used as a frequency tripler and....
Hi everyone, I`ve been looking at the ""proper"" voltages for charging, and especially at this....
Voltage splitter using op-amp uA741 IC, circuit diagram, working, description....
ICs have largely replaced circuits such as this, this circuit still finds use where the flexibility of a discrete device design is desirabe. Parts are easy to obtain and the problem of IC obsolescense is eliminated. The TIP31A can be heatsinked to a small....
1Hz Clock Generator Circuit with Chip On Board (COB). The COBs used in different watches may differ somewhat in their configuration. But by trial-and error one can always find out the appropriate points corresponding to points A, B, C and D. This is the 1Hz....
This circuit is a differential analog circuit switches. The FM1208 monolithic dual differential multiplexer used in applications where the RDS (ON) must be the same match. Since RDS (ON) for monolithic dual tracks at better than 1% of the broad temperature....
This application note includes a brief overview of power amplifier theory and it includes simulation results that provide insight into the operation of the power amplifier on all of MAXIM s LFRF transmitters and transceivers....
Electronics Tutorial about Combinational Logic Circuits that use Logic Gates to make Multiplexers, Encoders and Solid State Switches....
The SA1140 is an IF system IC designed for FM car stereo receivers. It features versatile muting characteristics which CAN be varied with external parts. By Silan ..
Telephone electronic coded lock circuit is shown as above,the electronic coded lock is suitable for double audio circuits.After the phone adds this coded lock, when you call out,you must use the buttons on the phone to press the four pre-programmed....
To build the circuit, attach a 220-ohm resistor to pin 13. Then attach the long leg of an LED (the positive leg, called the anode) to the resistor. Attach the short leg (the negative leg, called the cathode) to ground. Then plug your Arduino board into your....
The receiver is built on a single-sided printed circuit board which measures 2 by 4. 3 inches. The small size means that the board can be fitted into a wide variety of enclosures, which should be well screened. The main directional signal is picked up by a....
A Pierce Oscillator is a type of oscillator that uses a crystal instead of a parallel-resonant circuit [LC circuit]. A pierce oscillator also uses the voltage developed from a tap between two capacitors in the tank circuit, as shown to the right. range. Both....
Q1, Q2 & Q3 form a high impedance super-Darlington that drives the relay, amplifying the 50 or 60Hz alternate mains-supply frequency induced in the sensor by the human body. C1, D2 & D3 ensure a clean switching of the relay. Power supply can be any....
A 12V 20W halogen lamp (MR16) and a 4. 2Ah SLA battery for my bike light system. The battery has only limited life at this power rating, so I designed this cheap light dimmer to reduce the battery drain and allow for longer rides at night. Based on a simple....
Stabilized voltage inverter 12V-220V 200W is shown in the following diagram. It can adopt existing dual 12V-200W mains transformer. But its invert efficiency is low....
The Analog Devices ACP3610 is a voltage doubler that works with a switched-capacitor converter, using the push-pull principle. The switching frequency at the output is approximately 550 kHz. The term push-pull` refers to the two charge pumps, which work in....
My JD mower, for quite awhile now, has been very erratic at starting. Sometimes the starter will activate, but more often it will not. Yet after a long wait it will sometimes start. I found a tip on the internet, recommending puting a relay in the circuit.....
For the most part we live in an analog world and when using a microcontroller, it is often necessary to be able to convert a digital value into its analog equivalent (or, for that matter, an analog value to a digital value but that`s not what this post is....
Using a 555 with perhaps a 4029, and I would add a 4511, then connect the pins (using resistors of course), of the bargraph leds, to "a-g" pins of the 4511. To top it all off the graphs I received are all common anode, which is a pain because I`m not too....
This is a high fidelity external USB Soundcard / USB Headphones project that can be built for your PC or Mac. It is based on the latest PCM2706 IC which functions as a high quality, crystal clear 16-BIT Stereo DAC. It is a single chip digital-to-analog....
The MAXQ3210 ia a powerful RISC microcontroller. This device have features and capabilities to make it compatible for battery-powered applications that detect....
The diagrams below detail the development of a simple modular radio receiver based entirely on circuits and devices studied during the Part IA course on Linear Circuits and Devices. This receiver may not take the market by storm! However, we hope it will....
Anyone experimenting or developing USB ported peripheral hardware soon be comes irritated by the need to disconnect and connect the plug in order to reestablish communication with the PC. This process is necessary for example each time the peripheral....
Interested in starting an intro electronics project using a IR sensor and am having a little trouble understand the application circuit given on the datasheet of the circuit. The value of resistor they recommend using is far less then the one I calculate I....
A unit which is often very useful, if we need to isolate, in sound circuits, two stage between them. Then we can use this circuit which has an amplified unit, which gain X1, we do not use total negative feedback, only local, with the result that distortion....
Five uses tri-state audio logic pen (CD4066, 555) circuit diagram is shown as the chart. The circuit is mainly composed of the multivibrator, the four-way switch CD4066 (IC1) and the gate circuit composed of some RC components. Multivibrator is composed of....
A simple test circuit to fault find audio and radio equipment. Can be used to inject a square wave signal, rich in harmonics, or used with headphones as an audio tracer. A single pole double throw sitch is used to switch between inject and trace modes. The....
Adjustable 5A Step Down 5 MHz switching regulator circuit can also be used to overcome such problem. It uses ST1S03 step down DC-DC converter.The ST1S03 can also be used to power low-voltage digital core in HDD application. With input voltage range 3V to....
This is a light dimmer circuit. It has no fancy special feature, it is a a quite typical TRIAC based dimmer circuit. This circuit is only used to operate with....
this project use PIC18F25K20 microcontroller to detect if the sensor change state and it will emit a sound from the speaker or piezo, the MCU also detect the voltage of the battery in the startup, the algorithm it s very simple use an interrupt on change to....
The microcontroller (MCU) is responsible for sending variable voltages over time (just like a traditional LFO) to an effect that can be modulated by a voltage, or a pot on a traditional analog effect that can be replaced with an optoisolator/vactrol. Here`s....
Building battery boxes for the Speedster. While not an exciting topic, in converting almost any car to electric drive, most new builders are surprised to learn that making the car run on battery power is almost trivial. But 50% of the work centers on placing....
The following diagram is the circuit diagram of 20 band stereo graphic equaliser which will controlling the audio signal in specific frequency range. This circuit must be connected before the amplifier circuit. For maximum performance, you....
In the circuit below, a quad voltage comparator (LM339) is used as a simple bar graph meter to indicate the charge condition of a 12 volt, lead acid battery. A 5 volt reference voltage is connected to each of the (+) inputs of the four comparators and the....
The circuit was designed to produce a circuit that will alarm a sleeping person to prevent snoring by using a vibrator instead of an audio alert so as not....
This is a simple design of audio level meter. This circuit uses just one IC and a very few number of external components. This circuit is based on LM3915 as controller in the operation of the audio level meter circuit. It displays the audio level in terms of....
The MIDI Bass Pedal uses the MIDI keyboard encoder (MKE), which is capable of encoding any number of momentary action, push to make, single pole single throw (SPST), switches from 1 up to 128 to produce the equivalent MIDI note-on/note-off data commands. The....
A simple Water level indicator project with circuit diagram for home and industry.This water tank level sensor can be used for any liquid level indicator projects....
This infrared alarm barrier can be used to detect persons passing through doorways, corridors and small gates. The transmitter emits a beam of infrared light which is invisible to the human eye. The buzzer at the output of the receiver is activated when the....
When mains is absent, relay RL2 is in deenergised state, feeding battery supply to inverter section via its N/ C contacts and switch S1. The inverter section comprises IC2 (NE555) which is used in stable mode to produce sharp pulses at the rate of 50 Hz for....
Lately The Peasant has been building a music synthesizer using vacuum tubes. Although this will be used as a percussion synthesizer, it could just as easily be controlled by a keyboard or a MIDI to CV convertor. The first module built is a dual VCO. It is....
Basically, you would need a regulator circuitry. Since this involves DIY (do-it-yourself) project, it is required to be familiar with electronic components & circuitry, use of a multitester and a soldering iron. The schematic diagram below would take in any....
