New Circuits Page 123
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The simple circuit below regulates the voltage from a 6v solar panel to a fixed +5v. That voltage can be fed to any cell phone or USB connected portable device, to charge its battery. The circuit uses a Reg113-5 voltage regulator from Texas Instruments. The....
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Oscilloscope Xminilab-B on the microcontroller Atmel AVR ATXMEGA32A4 electro suite in rlocman The Gabotronis company produces debug board Oscilloscope Xminilab-B on the microcontroller Atmel AVR ATXMEGA32A4 electro suite. As we found in rlocman.ru, The....
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The schematic is attached, I`d like to have a suggestion if any improvement could be made, in particular I`d need to add a reverse polarity connection protection. I`m not a MOSFET expert, but: from the schematic I take it that the logic level inputs (5 V)....
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This 2 meter 144 MHz fox hunt transmitter is used in amateur competitions where a hidden transmitter is to be “hunted†using mostly home brewed receivers....
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Where there is heat, let us bring cooling: a fan will do the job, but unfortunately fans are usually noisy. In many cases there is no need for the fan to run continuously at full speed, and so it makes sense to control the fan speed in response to the....
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-
Using electronic scheme below can be designed a zener diode tester using few electronic parts. Using this zener tester and a multimeter can be measured and determined with a high precision threshold voltage of a zener diode. Zener voltage can be read with a....
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The medical ultrasonic atomizer circuit is composed of power supply circuit, ultrasonic oscillator and atomizer circuit, it is shown in the figure 9-110. The power supply circuit is made of timer Q, fuse FU, current transformer T, bridge rectifiers UR,....
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The following circuit shows about CMOS 4060 IC For Repeating Interval Timer Circuit Diagram. Features: Based On The CMOS 4060 IC, 14-bit binary ....
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This circuit is a modified hartley oscillator with a couple of extra components included. The transformer is a small audio transformer, type LT700. The primary is center tapped with an impedance of 1Kohms at 1KHz. The secondary has an impedance of 8 ohms.....
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This is an intermediate to advanced project and I do not recommend it as a first project if you are just getting started in synths or electronics. Only the circuit and some explanation are shown here. A lot of project building, troubleshooting and....
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The schematic diagram is quite straight forward. SW1 is a pushbutton used for starting the timer. The oputputs are set logic level 0 when the timer is not triggered, and to logic level 1 when the timer triggers. The relay driver transistor TR1, which....
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-
Remotely controlled light dimmers in theatrical and architechtural applications use 0-10V control signal for controlling the lamp brightness. In this case 0V means that the lamp is on and 10V signal means that the lamp in fully on. A voltage between those....
-
TDA2050 Audio Amplifier circuit diagram. There is a current environmental protection: the signal from the output passes through the connecting cables and chains of the column (in this case takes into account the reactance of the circuit section of the 4th....
-
The NiMH battery chemistry is a topic which, for most of us, is shrouded in mystery. Myths seem to form a large part of what this chemistry is about and how it should be treated or not treated as the case may be. The following script lists and explains a....
-
This is a simple circuit that can be used as a sequential signal light in automobiles. The circuit is based on two ICs. A TS 555 CN CMOS timer IC and a CD4017 decade counter IC. The IC1 is wired as an astable multivibrator to trigger the counter IC. When....
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This is an efficient flyback driver for modern cylindrical rectified television flybacks. Many sites doesn`t provide circuits driving these transformers, they simply say that they are bad. I don`t agree. In fact I built this circuit. I spent a lot of time....
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How to Make a Hydrogen Generator 555 Timer Circuit PWM. This Pulse Width Modulation (PWM) Circuit could Produce Hydrogen on Demand....
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Frequency of transistor oscillator is controlled by either of two lengths of nickel tubing, each looting inside form having two coil windings. One coil acts as driver and the other as pickup to provide feedback voltage for sustaining oscillation at control....
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With the preset at its max. the flashing rate of the LED is about 1/2 a second. It can be increased by increasing the value of the capacitor from 10uF to a higher value. For example if it is increased to 22uF the flashing rate becomes 1 second. Make a PCB in....
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As shown in the figure, it isa sensing automatically lightmade by newHN911L pyroelectric infrared detection module. The HN911L integrates high - sensitivity infrared sensors, PIR, amplifiers, signal processing circuit andoutput circuit. Itisable to remote....
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Can work in all 2323 chips but better is AT90LS2323 with working voltage 2.7 6 volts. The micro controller that I use is AT90S2323 with working ....
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-
This circuit is much more modest, but certainly still worth the effort. It provides a high quality interior light delay. This is a feature that is included as standard with most modern cars, although the version with an automatic dimmer is generally only....
-
Build your own simple mini FM transmitter. This fun project will show you how to build a mini broadcasting transmitter that can transmit an audio signal up to a quarter mile to any FM receiver. It`s easy to build and a good learning experience. It serves as....
-
The high voltage electrolytic capacitors in valve equipment tend to deteriorate if the equipment is not used for an extended period. This deterioration takes the form of reduced capacitance and greatly increased leakage current. In some cases, the capacitor....
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To get the usual BPM range for music of between 40 and 240 BPM, that corresponds to periods of 1500 ms and 200 ms respectively. A BPM of 120 is exactly 500 ms. As it is, the circuit would require an R4 of 14. 5 Mohm to yield a period of 500 ms (120 BPM). I....
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The NC monostable multivibrator circuit shown in the chart is composed of four 2 input NOR gate CC4001 and 14-bit binary serial counter / divider CC4020. It mainly used as time delay switch or timer in automatic control equipments....
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Developing a sensor to measure the snow. If the sensor could be made inexpensively, then the power of the Internet could be used to collect a large number of samples over large areas. The popular weather datacollections sites ( Weather Underground, Citizen....
-
A differentiating circuit is a circuit that produces pulses or that fades out input waveforms from its peak value all the way down to zero. To show this visually, let`s view the waveforms, which will show the result of this project. So you can see the input....
-
U1 (555 in monostable) creates a square wave signal to matchyour signal. then it sends that square wave into the mixer (u2) along with your original signal to be mixed. so it actually is a doubler. every note you play will have a square wave note of the same....
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For several years now, a rear fog lamp has been mandatory for trailers and caravans in order to improve visibility under foggy conditions. When this fog lamp is switched on, the fog lamp of the pulling vehicle must be switched of to avoid irritating....
-
-
This circuit generates a square-wave which is useful as a clock signal or AC drive for the excitation of sensors. this article presents a square-wave...
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This circuit is a simple buzzer circuit and it called novel buzzer. It only uses a relay in series with a small audio transformer and speaker. The relay will...
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Decided to quench my curiosity and see if a PICAXE-18X chip running at 4Mhz. was capable of this application. I also wanted to have a go at a project from the ground up. Designing the circuit, drawing up the printed circuit board artwork, etching the circuit....
-
You don t need access to fancy test gear to check and fault-find computer data cables. Instead, this simple device will give a quick indication of the sta....
-
This power monitor device provides accurate voltage and current monitoring of positive supply rail from 7V to 80V through a simple I2C interface, according to the datasheet. Such in automotive which has monitoring power in high transient environment, this....
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-
Schematic and description of simple automatic NiMH battery charger circuit using IC 7805 with multiple selectable current options for charging. ....
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A simple 5V boost converter using LTC3440 shown here. LTC3440 is a high efficiency DC to DC converter that can be operated from input voltages below, above or equal to the output voltage. As for the synchronous rectification, LTC3440 delivers up to 96%....
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Today we are going to explain about a simple circuit which is used to switch on/off any electrical device remotely through a relay using the normal TV/VCR....
-
-
This stage begins at the VHF antenna. The incoming VHF RF signal is preamplified and filtered and presented as the "RF" signal to the ADE + Double Balanced Mixer (DBM). That mixer also accepts the Local Oscillator `s output (BEFORE the Quadrature Clock....
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One shot multivibrator circuit is also known as monostable multivibrator or timer. The function of such circuit is simply produce a pulse strobe with a fixed....
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Here the schematic diagram of 100W Inverter Circuit which will convert 12VDC input to be 220VAC output. The circuit built based IC CD4047 to generate sine wave signal 50Hz and then the power transistor 2N3055 will boost the signal so that the signal have....
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This project introduces a fundamental electronics building block: the counter. Building yourself a simple circuit which increments display count every second, you are going to learn how displays work and how to drive them in the right way. For those who....
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When this alarm is activated its Siren will sound once - for up to 20-minutes. Then it will switch off and remain off. The basic circuit has a single zone with independently adjustable Exit and Entry delays. This will be adequate in many situations. However,....
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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....
-
-
The diagram is useful when replacing components since it shows component locations. It also identifies the wires by certain colors and identifies the specific component terminals that the wires are connected to. The most common types of diagrams are....
-
The lm1875 is a monolithic audio amplifier that offers a very low distortion and a performance of high quality for projects of audio amplifiers. The lm1875 supplies 20 watts in loads of 4 Ohms or 8 Ohms...
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Using 567 IC tone decoder/detector, we can build a remote control and or intercom. This circuit can be used to control a relay, or to carry an audio signal....
-
When I was designing an off-line boost-mode switching power supply, I wanted to model the power transformer, to be able to also simulate the inrush current and other startup behavior. After doing some searches and asking some questions in discussion groups....
-
15 Watts Class B Audio amplifier circuit. This 15W amplifier circuit is designed using a dual op-amp LM833. Diagram and Schematics are shown. Potentiometer enables volume control....
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-
The Network Time Protocol (NTP) has revolutionized the world. Suddenly one could have anywhere in the world accurate time and date. NTP is a simple UDP based protocol and can be implemented in a Microcontroller. So far we have only implemented UDP and TCP....
-
Here is a simple circuit that can be used to check the sound levels. The sound pressure meter is vey useful in setting up home theater systems, if you need to test the sound pressure of each channels on different positions in the room. The circuit is nothing....
-
-
A radio camera on a model railway should transmit constantly while the train is moving and continue transmitting for a few minutes after the train stops ..
-
The STM1061 low power voltage detector provides monitoring of battery, power-supply, and regulated system voltages. A precision Voltage Reference and Comparator monitors the V CC input and compares it with a specified voltage threshold condition. When V....
-
Manual buzzers used for quiz competitions in schools and colleges create a lot of confusion in identifying the first respondent. Although there are circuits using PCs and discrete ICs, they are either too expensive or limited to only a few number of players.....
-
Microcontroller based old water tank fillercircuit diagram. difference between microprocessor and microcontrollerppt, parallel port interfacing projects with microcontroller, microcontroller use in real live, circuit diagram of avr microcontroller trainer,....
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-
This acticle describes how to build a simple yet effective sound trigger for cameras or flashes. The circuit allows to experiment with high-speed photography....
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One of the most interesting shield that you can mount on the Arduino platform is certainly the ethernet shield, because enable numerous networking applications such as remote control of systems and users, web access and publication of data, and more yet, the....
-
-
Under dry conditions, the transistor will have no bias current and be fully off. However as the probes get wet the transistor will conduct and sounding the alarm. An On/Off switch is provided and remember to use a non-reactive metal for th..
-
Application Notes, Resolvers as Velocity and Position Encoding Devices, Potentiometer, Incremental encoder, Absolute encoder, Resolver, Inductosyn...
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-
Using the LTC3113 fixed frequency, buck-boost DC DC converter can be designed various power supplies circuits that operates from input voltages above, below or equal to the output voltage. The topology incorporated in the IC provides low noise operation,....
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This is the circuit of a based audio preamplifier which has very low noise. One FET and one BJT are used in this circuit. The audio signal to be amplified is coupled to the base of FET Q1 using capacitor C1 and resistor R3. Base of transistor Q2 is coupled....
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This circuit would be mounted in a small plastic or preferably metal box, with a 9V battery, level control, a male XLR connector (same as on a microphone) and a switch. Current drain is low, since the circuit only uses one dual op amp. There is no need for a....
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-
The idea was that you removed the center page from the magazine and cut it into four pieces to obtain a card that would fit into a filing system. The front side of each card would gave the connections to the IC, while the other side would contain technical....
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Hello, I`ve made a DS18S20 -based serial port temperature sensor. I would like to connect it to the usb port on my Asus WL-500gp v2. The temperature sensor works perfectly on the pc connected to a serial port directly, but I can`t get it to work with my....
-
-
150 - 210 secs analog delay timer project for control of devices that need to have a minimum off timer before power can resume to prevent damage to the devices ..
-
-
This circuit shows about Bi-Directional Motor Control CIrcuit With NE555 IC. Features: 12V DC power supply, IC is used to control the relay RL1 ....
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This circuit is a simple form of the commercial UPS, the circuit provides a constant regulated 5 Volt output and an unregulated 12 Volt supply..
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The following picture shows the electrical wiring connection diagram for Honda Motorcycle CB400 (Hawk II). It shows the connection between Honda parts such as the turn signal, emergency stop switch, starter button, spark plug, capacitor discharge ignition....
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-
This circuit generates a good 1KHz sinewave using the inverted Wien bridge configuration....
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The circuit consists of a sensitive LM358 based comparator, IC1A, which keeps monostable IC2A (a 4538) triggered as long as an audio signal is detected at the input. Via coupling capacitor C1 the circuit takes its input signal from the hot` side of the....
-
Here is a simple and powerful LED circuit that can be operated directly from the AC 100 volt to AC 230 Volts mains supply. The circuit can be used as mains power locator or night lamp etc.. The resistor R1,R2 and capacitor C1 provides necessary current....
-
Habit-acquisition system. Tag physical objects like dumbells, medicine bottles, etc with RF tags or microcontrollers, and use them to detect and log users` interactions with these objects. Virtual plants and creatures that simulate the health of real things,....
-
The simple circuit below regulates the voltage from a 6v solar panel to a fixed +5v. That voltage can be fed to any cell phone or USB connected portable device, to charge its battery. The circuit uses a Reg113-5 voltage regulator from Texas Instruments. The....
Oscilloscope Xminilab-B on the microcontroller Atmel AVR ATXMEGA32A4 electro suite in rlocman The Gabotronis company produces debug board Oscilloscope Xminilab-B on the microcontroller Atmel AVR ATXMEGA32A4 electro suite. As we found in rlocman.ru, The....
The schematic is attached, I`d like to have a suggestion if any improvement could be made, in particular I`d need to add a reverse polarity connection protection. I`m not a MOSFET expert, but: from the schematic I take it that the logic level inputs (5 V)....
This 2 meter 144 MHz fox hunt transmitter is used in amateur competitions where a hidden transmitter is to be “hunted†using mostly home brewed receivers....
Where there is heat, let us bring cooling: a fan will do the job, but unfortunately fans are usually noisy. In many cases there is no need for the fan to run continuously at full speed, and so it makes sense to control the fan speed in response to the....
Using electronic scheme below can be designed a zener diode tester using few electronic parts. Using this zener tester and a multimeter can be measured and determined with a high precision threshold voltage of a zener diode. Zener voltage can be read with a....
The medical ultrasonic atomizer circuit is composed of power supply circuit, ultrasonic oscillator and atomizer circuit, it is shown in the figure 9-110. The power supply circuit is made of timer Q, fuse FU, current transformer T, bridge rectifiers UR,....
The following circuit shows about CMOS 4060 IC For Repeating Interval Timer Circuit Diagram. Features: Based On The CMOS 4060 IC, 14-bit binary ....
This circuit is a modified hartley oscillator with a couple of extra components included. The transformer is a small audio transformer, type LT700. The primary is center tapped with an impedance of 1Kohms at 1KHz. The secondary has an impedance of 8 ohms.....
This is an intermediate to advanced project and I do not recommend it as a first project if you are just getting started in synths or electronics. Only the circuit and some explanation are shown here. A lot of project building, troubleshooting and....
The schematic diagram is quite straight forward. SW1 is a pushbutton used for starting the timer. The oputputs are set logic level 0 when the timer is not triggered, and to logic level 1 when the timer triggers. The relay driver transistor TR1, which....
Remotely controlled light dimmers in theatrical and architechtural applications use 0-10V control signal for controlling the lamp brightness. In this case 0V means that the lamp is on and 10V signal means that the lamp in fully on. A voltage between those....
TDA2050 Audio Amplifier circuit diagram. There is a current environmental protection: the signal from the output passes through the connecting cables and chains of the column (in this case takes into account the reactance of the circuit section of the 4th....
The NiMH battery chemistry is a topic which, for most of us, is shrouded in mystery. Myths seem to form a large part of what this chemistry is about and how it should be treated or not treated as the case may be. The following script lists and explains a....
This is a simple circuit that can be used as a sequential signal light in automobiles. The circuit is based on two ICs. A TS 555 CN CMOS timer IC and a CD4017 decade counter IC. The IC1 is wired as an astable multivibrator to trigger the counter IC. When....
This is an efficient flyback driver for modern cylindrical rectified television flybacks. Many sites doesn`t provide circuits driving these transformers, they simply say that they are bad. I don`t agree. In fact I built this circuit. I spent a lot of time....
How to Make a Hydrogen Generator 555 Timer Circuit PWM. This Pulse Width Modulation (PWM) Circuit could Produce Hydrogen on Demand....
Frequency of transistor oscillator is controlled by either of two lengths of nickel tubing, each looting inside form having two coil windings. One coil acts as driver and the other as pickup to provide feedback voltage for sustaining oscillation at control....
With the preset at its max. the flashing rate of the LED is about 1/2 a second. It can be increased by increasing the value of the capacitor from 10uF to a higher value. For example if it is increased to 22uF the flashing rate becomes 1 second. Make a PCB in....
As shown in the figure, it isa sensing automatically lightmade by newHN911L pyroelectric infrared detection module. The HN911L integrates high - sensitivity infrared sensors, PIR, amplifiers, signal processing circuit andoutput circuit. Itisable to remote....
Can work in all 2323 chips but better is AT90LS2323 with working voltage 2.7 6 volts. The micro controller that I use is AT90S2323 with working ....
This circuit is much more modest, but certainly still worth the effort. It provides a high quality interior light delay. This is a feature that is included as standard with most modern cars, although the version with an automatic dimmer is generally only....
Build your own simple mini FM transmitter. This fun project will show you how to build a mini broadcasting transmitter that can transmit an audio signal up to a quarter mile to any FM receiver. It`s easy to build and a good learning experience. It serves as....
The high voltage electrolytic capacitors in valve equipment tend to deteriorate if the equipment is not used for an extended period. This deterioration takes the form of reduced capacitance and greatly increased leakage current. In some cases, the capacitor....
To get the usual BPM range for music of between 40 and 240 BPM, that corresponds to periods of 1500 ms and 200 ms respectively. A BPM of 120 is exactly 500 ms. As it is, the circuit would require an R4 of 14. 5 Mohm to yield a period of 500 ms (120 BPM). I....
The NC monostable multivibrator circuit shown in the chart is composed of four 2 input NOR gate CC4001 and 14-bit binary serial counter / divider CC4020. It mainly used as time delay switch or timer in automatic control equipments....
Developing a sensor to measure the snow. If the sensor could be made inexpensively, then the power of the Internet could be used to collect a large number of samples over large areas. The popular weather datacollections sites ( Weather Underground, Citizen....
A differentiating circuit is a circuit that produces pulses or that fades out input waveforms from its peak value all the way down to zero. To show this visually, let`s view the waveforms, which will show the result of this project. So you can see the input....
U1 (555 in monostable) creates a square wave signal to matchyour signal. then it sends that square wave into the mixer (u2) along with your original signal to be mixed. so it actually is a doubler. every note you play will have a square wave note of the same....
For several years now, a rear fog lamp has been mandatory for trailers and caravans in order to improve visibility under foggy conditions. When this fog lamp is switched on, the fog lamp of the pulling vehicle must be switched of to avoid irritating....
This circuit generates a square-wave which is useful as a clock signal or AC drive for the excitation of sensors. this article presents a square-wave...
This circuit is a simple buzzer circuit and it called novel buzzer. It only uses a relay in series with a small audio transformer and speaker. The relay will...
Decided to quench my curiosity and see if a PICAXE-18X chip running at 4Mhz. was capable of this application. I also wanted to have a go at a project from the ground up. Designing the circuit, drawing up the printed circuit board artwork, etching the circuit....
You don t need access to fancy test gear to check and fault-find computer data cables. Instead, this simple device will give a quick indication of the sta....
This power monitor device provides accurate voltage and current monitoring of positive supply rail from 7V to 80V through a simple I2C interface, according to the datasheet. Such in automotive which has monitoring power in high transient environment, this....
Schematic and description of simple automatic NiMH battery charger circuit using IC 7805 with multiple selectable current options for charging. ....
A simple 5V boost converter using LTC3440 shown here. LTC3440 is a high efficiency DC to DC converter that can be operated from input voltages below, above or equal to the output voltage. As for the synchronous rectification, LTC3440 delivers up to 96%....
Today we are going to explain about a simple circuit which is used to switch on/off any electrical device remotely through a relay using the normal TV/VCR....
This stage begins at the VHF antenna. The incoming VHF RF signal is preamplified and filtered and presented as the "RF" signal to the ADE + Double Balanced Mixer (DBM). That mixer also accepts the Local Oscillator `s output (BEFORE the Quadrature Clock....
One shot multivibrator circuit is also known as monostable multivibrator or timer. The function of such circuit is simply produce a pulse strobe with a fixed....
Here the schematic diagram of 100W Inverter Circuit which will convert 12VDC input to be 220VAC output. The circuit built based IC CD4047 to generate sine wave signal 50Hz and then the power transistor 2N3055 will boost the signal so that the signal have....
This project introduces a fundamental electronics building block: the counter. Building yourself a simple circuit which increments display count every second, you are going to learn how displays work and how to drive them in the right way. For those who....
When this alarm is activated its Siren will sound once - for up to 20-minutes. Then it will switch off and remain off. The basic circuit has a single zone with independently adjustable Exit and Entry delays. This will be adequate in many situations. However,....
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....
The diagram is useful when replacing components since it shows component locations. It also identifies the wires by certain colors and identifies the specific component terminals that the wires are connected to. The most common types of diagrams are....
The lm1875 is a monolithic audio amplifier that offers a very low distortion and a performance of high quality for projects of audio amplifiers. The lm1875 supplies 20 watts in loads of 4 Ohms or 8 Ohms...
Using 567 IC tone decoder/detector, we can build a remote control and or intercom. This circuit can be used to control a relay, or to carry an audio signal....
When I was designing an off-line boost-mode switching power supply, I wanted to model the power transformer, to be able to also simulate the inrush current and other startup behavior. After doing some searches and asking some questions in discussion groups....
15 Watts Class B Audio amplifier circuit. This 15W amplifier circuit is designed using a dual op-amp LM833. Diagram and Schematics are shown. Potentiometer enables volume control....
The Network Time Protocol (NTP) has revolutionized the world. Suddenly one could have anywhere in the world accurate time and date. NTP is a simple UDP based protocol and can be implemented in a Microcontroller. So far we have only implemented UDP and TCP....
Here is a simple circuit that can be used to check the sound levels. The sound pressure meter is vey useful in setting up home theater systems, if you need to test the sound pressure of each channels on different positions in the room. The circuit is nothing....
A radio camera on a model railway should transmit constantly while the train is moving and continue transmitting for a few minutes after the train stops ..
The STM1061 low power voltage detector provides monitoring of battery, power-supply, and regulated system voltages. A precision Voltage Reference and Comparator monitors the V CC input and compares it with a specified voltage threshold condition. When V....
Manual buzzers used for quiz competitions in schools and colleges create a lot of confusion in identifying the first respondent. Although there are circuits using PCs and discrete ICs, they are either too expensive or limited to only a few number of players.....
Microcontroller based old water tank fillercircuit diagram. difference between microprocessor and microcontrollerppt, parallel port interfacing projects with microcontroller, microcontroller use in real live, circuit diagram of avr microcontroller trainer,....
This acticle describes how to build a simple yet effective sound trigger for cameras or flashes. The circuit allows to experiment with high-speed photography....
One of the most interesting shield that you can mount on the Arduino platform is certainly the ethernet shield, because enable numerous networking applications such as remote control of systems and users, web access and publication of data, and more yet, the....
Under dry conditions, the transistor will have no bias current and be fully off. However as the probes get wet the transistor will conduct and sounding the alarm. An On/Off switch is provided and remember to use a non-reactive metal for th..
Application Notes, Resolvers as Velocity and Position Encoding Devices, Potentiometer, Incremental encoder, Absolute encoder, Resolver, Inductosyn...
Using the LTC3113 fixed frequency, buck-boost DC DC converter can be designed various power supplies circuits that operates from input voltages above, below or equal to the output voltage. The topology incorporated in the IC provides low noise operation,....
This is the circuit of a based audio preamplifier which has very low noise. One FET and one BJT are used in this circuit. The audio signal to be amplified is coupled to the base of FET Q1 using capacitor C1 and resistor R3. Base of transistor Q2 is coupled....
This circuit would be mounted in a small plastic or preferably metal box, with a 9V battery, level control, a male XLR connector (same as on a microphone) and a switch. Current drain is low, since the circuit only uses one dual op amp. There is no need for a....
The idea was that you removed the center page from the magazine and cut it into four pieces to obtain a card that would fit into a filing system. The front side of each card would gave the connections to the IC, while the other side would contain technical....
Hello, I`ve made a DS18S20 -based serial port temperature sensor. I would like to connect it to the usb port on my Asus WL-500gp v2. The temperature sensor works perfectly on the pc connected to a serial port directly, but I can`t get it to work with my....
150 - 210 secs analog delay timer project for control of devices that need to have a minimum off timer before power can resume to prevent damage to the devices ..
This circuit shows about Bi-Directional Motor Control CIrcuit With NE555 IC. Features: 12V DC power supply, IC is used to control the relay RL1 ....
This circuit is a simple form of the commercial UPS, the circuit provides a constant regulated 5 Volt output and an unregulated 12 Volt supply..
The following picture shows the electrical wiring connection diagram for Honda Motorcycle CB400 (Hawk II). It shows the connection between Honda parts such as the turn signal, emergency stop switch, starter button, spark plug, capacitor discharge ignition....
This circuit generates a good 1KHz sinewave using the inverted Wien bridge configuration....
The circuit consists of a sensitive LM358 based comparator, IC1A, which keeps monostable IC2A (a 4538) triggered as long as an audio signal is detected at the input. Via coupling capacitor C1 the circuit takes its input signal from the hot` side of the....
Here is a simple and powerful LED circuit that can be operated directly from the AC 100 volt to AC 230 Volts mains supply. The circuit can be used as mains power locator or night lamp etc.. The resistor R1,R2 and capacitor C1 provides necessary current....
Habit-acquisition system. Tag physical objects like dumbells, medicine bottles, etc with RF tags or microcontrollers, and use them to detect and log users` interactions with these objects. Virtual plants and creatures that simulate the health of real things,....
