New Circuits Page 48
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Astable multivibrator is an electronic device which can continuously shift between its two states with respect to the output. If the output corresponding to one particular state is high, then the output corresponding to the other state is low. This nature of....
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-
-
This light sensor switch circuit allows the automatic connection of a lamp when the light is low (at nightfall) and will maintain the lamp ON for a certain period of time. From the moment that T4 and T5 are opened, relay`s LED start to light and powers the....
-
This circuit uses a small AC current transformer from Magnetek to produce an isolated voltage proportional to the AC current in the primary winding..
-
This current-limiting circuit, shown in this example as part of a small bench power supply, could in principle be used in conjunction with any dual-rail current source. The part of the circuit to the left of the diagram limits the current at the input to the....
-
1-Chip AM/FM Radio Circuit CXA1191 The UTC CXA1191 is a one-chip FM/AM Radio IC designed for radio-cassette tape recorders and Headphone tape recorders. By LianShun Electronics Co. , Ltd ..
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-
The circuit diagram shown here is of a Hall Effect switch. Hall Effect sensor IC DN6848 from Panasonic is the heart of the circuit. The DN6848 has a built-in Hall Effect sensor, Schmitt trigger circuit, power supply regulator and temperature compensation....
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-
-
First of all, the circuit is ok, but it`s rather unstable. It varies with temperature, and, for eg, I turned it on and I tune it. Them I switch it..
-
This is a detailed explanation of a procedure you can use to modify a UHF MICOR "M" range (450-470 MHz) receiver board so it operates adequately in the 435-450 MHz range. This is an enhancement to Kevin`s text-only article. These receivers are commonly found....
-
-
This circuit uses the popular and easy to find LM3914 IC. This IC is very simple to drive, needs no voltage regulators (it has a built in voltage regulator) and can be powered from almost every source. Electronics project....
-
This section of code outlines the main sequence of operation for the sequencer. First, a for loop is utilized to govern which step the sequencer is operating in. Within this loop, first an address is made using the assignByteToPins() function, this sends a 4....
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The following circuit shows about SCR BRY35 For Simple Radio Control Circuit. Features: simple and efficient receiver for operating:(starter ....
-
Here`s a handy Arduino shield: we`ve had a lot of people looking for a dedicated and well-designed data logging shield. We worked hard to engineer an inexpensive but well-rounded design. Not only is it easy to assemble and customize, it also comes with great....
-
Disclaimer All files are found using legitimate search engine techniques. This site does not and will not condone hacking into sites to create the links it list. We will and do assume that all links found on the search engines we use are obtained in a legal....
-
-
-
Micro PSU to power a breadboard with 5 volts. Connect to 9V battery, 12V or any other DC powersource from 8 to 18 volts. Follow the instructions on the site below to build your own mini 5V power supply. Disclaimer All files are found using legitimate search....
-
Well, I have few good uses for it, one of them is ensure in meetings people are respectful of time and are not taking all the time for their own topics. Good for ship-room or SCRUM meetings. Following is a list of parts and for the special ones a link for....
-
As the name indicates, the step switch selector circuit is intended to choose one of up to four analogue switches, which it does with the aid of some less....
-
This part of my site features a stereo decoder circuit suitable for both my pulse counting FM Receivers and other types of FM Tuner, such as the old valve type that incorporates a Foster Seeley or Ratio Detector. This particular stereo decoder IC, MC1310P....
-
Dew sensor. Dew (condensed moisture) ad- versely affects the normal per- formance of sensitive electronic devices. A low-cost circuit described here can be used to...
-
A cheaper way to build or buy something with similar functionality It doesn`t necessarily even need to be remote controlled if it could be programmed to go off at certain times...
-
Many passive field strength meters have appeared in the past, typically using a 50mA analog meter movement if reasonable sensitivity was to be obtained. This circuit is similar but has the advantage that it works with the high-impedance load of a digital....
-
Good Preparation. I like this. There is one suggestion you can use RFM70 or RFM22 for RF communication....
-
Just wondering if there was a simple way to bypass the tone contols in the pas preamp. I believe there is a feedback circuit involved, so wasn`t sure ....
-
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. But if the train starts up again after a relatively long halt, imagery should be transmitted....
-
Above circuit diagram is a easy, simple and cheap switching voltage regulator which has capability to deliver adjustable voltage output range of 1. 8V to 32V and static electric current of 3A. This regulator use adjustable regulator IC of LM317HV and a power....
-
NE556 timer can be used as an indicator of static of digital logic audible terminal. Audible logic probe is useful for inspecting a part visually while we also need to check the logic state on other point far from the part. NE556 acts as an oscillator....
-
Here is a battery monitor circuit which can be used to monitor the voltage of 12V lead acid batteries such as car batteries. The circuit is built around the LM3914 IC and some external components with 10 LEDs which will indicate the voltage level. Two....
-
Using a single 7812 ic voltage regulator and multiple outboard pass transistors, this power supply can deliver output load currents of up to 30 amps. this circuit is Using a single 7812 IC voltage regulator and multiple outboard pass transistors, this power....
-
Multiple unit radio control : How to make a multi-iunit radio control system....
-
-
This fm 88-108 Mhz radio amplifier is equiped with BLF 245 and can be user with a heatsink from a processor and cooler. The BLF 245 Datasheet can be downlo....
-
Is slowing Once a primary driver for growth, the adoption of high definition and digital cable service is starting to slow as the numbers of applications on PCs (Skype, magicJack) and smartphones. Even the increased adoption rates of MSO voice. e…§e® Is....
-
This circuit is based on the BA5406 audio integrated circuit and also capable to provide maximum output power of 3 watts per channel . This audio ....
-
TheM-8880 is a completeDTMF Transmitter/Receiver that fea- tures adjustable guard time, Automatic Tone burst mode, call progressmode, and a fully compatible 6500/6800microproces- sor Interface The receiver portion is based on the industry stan- dard M-8870....
-
What is DAC Digital to analog converter (DAC) is used to get analog voltage corresponding to an input digital data. Data in binary digital form can be converted to corresponding analog form by using a R-2R ladder (binary weighted resistor) network and a....
-
-
Higher bandwidth connections are made by grouping 4 or 12 pairs together, for up to 3 GB/s full-duplex connections. InfiniBand is designed to be used over a Backplane, Copper wire or Fiber. The impedance for the PWB interface or cable interface is 100W. All....
-
This circuit is onlyreader. It`s not programmer. You CANNOT refill, hack or any illegal thing, the telecards. The purposeof this circuit is for you to understand how a microcontroller readsthetelecard, forbuilding other electronic circuits such as"electronic....
-
The DIY `Plasma Gun` is a small homemade Tesla Coil gun powered by an 18V battery. It also has a special plasma discharge terminal that can fire ionized gas and flames! The whole system is mounted inside the body of an old cordless drill so that is fully....
-
There are plenty of digital thermometers with ·1 C displays but the accuracy is about + 1 C and you can not calibrate them. I made this thermometer circuit from components that were available at the local electronics hobby shop and it was an educational....
-
The circuit below consists of two multivibrators. The first multivibrator provides the speed of the change from `hee` to `haw` and operates at a low frequency....
-
Nowadays, it is no longer necessary to use discrete components to build oscillators. Instead, many manufacturers provide ready-made voltage-controlled oscillator (VCO) ICs that need only a few frequency-determining external components. One example is the RF....
-
Power Amplifier Speaker Protection Circuit Schematic While switching a power amplifier on, a loud thump sound is heard to sudden heavy discharge....
-
A low distortion audio frequency sine wave can be easily generated by passing the output of a simple square wave oscillator through a sharp cut off low pass filter to attenuate the odd harmonic components. The output level of the sine wave is precisely....
-
This application note discussed the use of SEPIC power modules to provide the power needed to drive high-brighness LED arrays. The arrays are used as display backlights and require a wide dimming range. The SEPIC approach provides an efficient and flexible....
-
In this project i have interfaced an GPS with AVR microcontroller, the ATtiny2313 gets the location from the GPS and display it over the LCD display...
-
The heart of the circuit is the two transistor flasher with frequency modulation applied to the base of the first transistor. When the pushbutton is depressed, the frequency of oscillation climbs to a peak and when the button is released, the frequency....
-
Modern ICON electronic engine controls from BRP..
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The LED car voltmeter consists of the filter circuit, voltage distribution filter circuit, voltage amplifier circuit and LED display circuit, see as figure 7-77. The regulator filter circuit consists of the 3-terminal IC1 and filter capacitor C1. The voltage....
-
I`m currently using a Gecko G540 drive module to drive the stepper motors. This module has the ability to drive up to 4 stepper motors. They label the connections as XYZA - we`ll connect the C-axis stepper to the A output and leave the Y output unconnected.....
-
If you need about 12, 000 volts DC for an ion generator this circuit might be the ticket. It draws power from the 120vac power line but it uses a small 6KV camera flash trigger coil. The output signal is isolated from the power line. Although the circuit can....
-
The mixer circuit below has 3 line inputs and 3 mic inputs. The mic inputs are suitable for low impedance 200-1000R dynamic microphones. An ECM or condenser mic can also be used, but must have bias applied via a series resistor. Circuit to Connect Telephone....
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-
The most simple polarity protection tehnique is to connect a series diode to the power line input. The diode conducts only when the power supply protection....
-
This circuit was designed as an aid in parking the car near the garage wall when backing up. LED D7 illuminates when bumper-wall distance is about 20 cm. , D7+D6 illuminate at about 10 cm. and D7+D6+D5 at about 6 cm. In this manner you are alerted when....
-
This small circuit can be used to control model railway turnouts operated by AC voltages. A logic level in the range of 5 12 V can be used as the control signal. The coils of the turnout are switched using triacs. Changes in the logic level of the input....
-
-
The resistors R18 and R22 that should have been connected to pin 8 of U4 were mistakenly connected to pin 9. The present versions have been corrected. A minor error on the component layout is that there are two versions of C2, in the upper right and lower....
-
Ni-Cd Ni-MH Adjustable Constant Current Battery Charger Circuit This is a Adjustable Constant Current Ni-MH or Ni-Cd battery charger circuit. It....
-
-
The following are detailed schematics for the QScreen Controller. The QScreen Controller combines an embedded computer based on the 68HC11 microcontroller with a touch panel and LCD (liquid crystal display) graphic user interface ( GUI ) that is ideal for....
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-
-
Cb125S Wiring Diagram Manual PDF Download...
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Short-wave listeners often are not able to, or allowed to, install a long-wire antenna or other large dimension antenna in or around the home. In such cases, the present active antenna, intended for the frequency range 3 30 MHz, may be found useful. The....
-
My modification, i have two trigger coils , two power coils, one reed switch. The wheel is 4 north pole magnet, it generates 9 radiant pulses per....
-
-
This power supply was designed for use with the Simple hybrid amp` published elsewhere in this issue. It is of course suitable for use in other applications as well. We`ve used a cascade generator for the 170 V, a switch mode supply for the 16 V, a series....
-
The following circuit is six LED stereo VU display diagram which build using Dot/Bar Display Driver IC LM3915. This VU disply should be connected before amplifier module circuit. You may connect this circuit at pre-amp output, tone control input/output or....
-
Although there are many different configurations for Crystal Oscillators, the most common are the discrete and integrated circuits Pierce and environment RLC Bridge. When needed very good frequency stability and reasonably simple circuits, the discrete....
-
The following circuit shows about Simple Infrared Sensor Modules Circuit Diagram. Feature: simple infrared sensor module, flame detection, ....
-
Neural networks are wide topic. But this small example demonstrates how to create basic neural sensor which takes resistive readings from multiply sensors and multiply it by wight factor and then sum the results. Results are compared to three level....
-
If you want to build a 7 to 128 demux with 3-to-8 and 4-to-16 demuxes, then put the 3 high bits of your output address into the 3-to-8, and use the outputs of that as the input enable to the individual 4-to-16 demuxes (assuming that it has an enable pin), so....
-
This module can be a necessary addition to the Modular Preamplifier Control Center when more than two sources need to be connected to the preamplifier chain. Four high level inputs can be selected by means of SW1 and routed to the output. The output of this....
-
Original components, when still good, are stable and not subjected to infant mortality. Of course everybody has his own opinions derived from past experiences. Nevertheless answers may vary depending upon several reasons: quality of the design with proper....
-
This project is based on the parametric equalizer proposed by Elektor in the late 80s or early 90s and later published in the book "Creations electroniques" in 1993 (Publisher: Publitronic). Their design involved three stereo potentiometers per channel,....
-
The first example uses the standard op-amp oscillator circuit to generate a triangular waveform which is level-shifted and fed to a comparator (e. g. LM339) to give the PWM waveform. Most people will want to use two comparators rather than one op-amp and one....
-
-
-
-
Figure shows the circuit diagram of multi tone alarm. This is basically an amplifier circuit. The central part of this circuit is the dual...
-
This web page describes how to install and use my ezlog data logging software. This software allows you to measure when different events happened, allowing you to synchronise the timing of different stimuli. Specifically, my software is designed to get a....
-
This is a variation of the the Electron Coupled Oscillator circuit, pioneered by Dow in 1931. Dow`s ECO has the screen "grounded" for RF. In this circuit, because I am using filament-type tubes instead of heater-cathode types, and because I didn`t want to....
-
This be power motor controller 12V circuit. with a signal MCU Control be high class voltage , about 3V. It can motor control turn advance or walk go backwards...
-
-
Friends that seek 5V 10A power supply circuit small-sized and build easy. I begs for to advise this circuit. It is 10A switching regulator by use IC L4970A. Then build easy as an example integrated readymade circuit. Important point be power supply input....
-
-
This SPI Flash Programmer can be used either for in-system programming or as a stand-alone serial flash programmer for the Atmel SPI programmable devices. The programmer hardware interface is controlled by the PC parallel port and the parallel port control....
-
For example, once the motion sensor picks up motion, we can program the arduino to turn on an LED, turn on a motor so that it spins, sound a buzzer off, etc. In this circuit we are doing here, for simplicity, we will simply turn on an LED once the motion....
-
-
For this project, we are going to charge a capacitor with voltage and then have the capacitor act as a temporary power source for the circuit. After we charge the capacitor with the battery, we`re going to disconnect the battery from the circuit. The....
-
This fm transmitter circuit is very simple and it has a acceptable transmission. The signal transited from this fm transmitter circuit can be received at almost 300 meters in open air. The circuit require a 3volts operating voltage and can be tuned anywhere....
-
This is a schematic diagram of a micropower voltage-controlled oscillator circuit. This circuit can generate square and triangle wave outputs and only need....
-
-
A pair of multi-range timers offering periods of up to 24 hours and beyond. Both are essentially the same. The main difference is, that when the time runs out, Version 1 energizes the relay and Version 2 de-energizes it. The first uses less power while the....
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With a magnetic compass ensure that both pickups have a South polarity on the top of the pickup. Verify by reading a North polarity on the bottom of the pickup. You might rarely find both pickups with a North polarity on top. If you find one pickup with....
Astable multivibrator is an electronic device which can continuously shift between its two states with respect to the output. If the output corresponding to one particular state is high, then the output corresponding to the other state is low. This nature of....
This light sensor switch circuit allows the automatic connection of a lamp when the light is low (at nightfall) and will maintain the lamp ON for a certain period of time. From the moment that T4 and T5 are opened, relay`s LED start to light and powers the....
This circuit uses a small AC current transformer from Magnetek to produce an isolated voltage proportional to the AC current in the primary winding..
This current-limiting circuit, shown in this example as part of a small bench power supply, could in principle be used in conjunction with any dual-rail current source. The part of the circuit to the left of the diagram limits the current at the input to the....
1-Chip AM/FM Radio Circuit CXA1191 The UTC CXA1191 is a one-chip FM/AM Radio IC designed for radio-cassette tape recorders and Headphone tape recorders. By LianShun Electronics Co. , Ltd ..
The circuit diagram shown here is of a Hall Effect switch. Hall Effect sensor IC DN6848 from Panasonic is the heart of the circuit. The DN6848 has a built-in Hall Effect sensor, Schmitt trigger circuit, power supply regulator and temperature compensation....
First of all, the circuit is ok, but it`s rather unstable. It varies with temperature, and, for eg, I turned it on and I tune it. Them I switch it..
This is a detailed explanation of a procedure you can use to modify a UHF MICOR "M" range (450-470 MHz) receiver board so it operates adequately in the 435-450 MHz range. This is an enhancement to Kevin`s text-only article. These receivers are commonly found....
This circuit uses the popular and easy to find LM3914 IC. This IC is very simple to drive, needs no voltage regulators (it has a built in voltage regulator) and can be powered from almost every source. Electronics project....
This section of code outlines the main sequence of operation for the sequencer. First, a for loop is utilized to govern which step the sequencer is operating in. Within this loop, first an address is made using the assignByteToPins() function, this sends a 4....
The following circuit shows about SCR BRY35 For Simple Radio Control Circuit. Features: simple and efficient receiver for operating:(starter ....
Here`s a handy Arduino shield: we`ve had a lot of people looking for a dedicated and well-designed data logging shield. We worked hard to engineer an inexpensive but well-rounded design. Not only is it easy to assemble and customize, it also comes with great....
Disclaimer All files are found using legitimate search engine techniques. This site does not and will not condone hacking into sites to create the links it list. We will and do assume that all links found on the search engines we use are obtained in a legal....
Micro PSU to power a breadboard with 5 volts. Connect to 9V battery, 12V or any other DC powersource from 8 to 18 volts. Follow the instructions on the site below to build your own mini 5V power supply. Disclaimer All files are found using legitimate search....
Well, I have few good uses for it, one of them is ensure in meetings people are respectful of time and are not taking all the time for their own topics. Good for ship-room or SCRUM meetings. Following is a list of parts and for the special ones a link for....
As the name indicates, the step switch selector circuit is intended to choose one of up to four analogue switches, which it does with the aid of some less....
This part of my site features a stereo decoder circuit suitable for both my pulse counting FM Receivers and other types of FM Tuner, such as the old valve type that incorporates a Foster Seeley or Ratio Detector. This particular stereo decoder IC, MC1310P....
Dew sensor. Dew (condensed moisture) ad- versely affects the normal per- formance of sensitive electronic devices. A low-cost circuit described here can be used to...
A cheaper way to build or buy something with similar functionality It doesn`t necessarily even need to be remote controlled if it could be programmed to go off at certain times...
Many passive field strength meters have appeared in the past, typically using a 50mA analog meter movement if reasonable sensitivity was to be obtained. This circuit is similar but has the advantage that it works with the high-impedance load of a digital....
Good Preparation. I like this. There is one suggestion you can use RFM70 or RFM22 for RF communication....
Just wondering if there was a simple way to bypass the tone contols in the pas preamp. I believe there is a feedback circuit involved, so wasn`t sure ....
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. But if the train starts up again after a relatively long halt, imagery should be transmitted....
Above circuit diagram is a easy, simple and cheap switching voltage regulator which has capability to deliver adjustable voltage output range of 1. 8V to 32V and static electric current of 3A. This regulator use adjustable regulator IC of LM317HV and a power....
NE556 timer can be used as an indicator of static of digital logic audible terminal. Audible logic probe is useful for inspecting a part visually while we also need to check the logic state on other point far from the part. NE556 acts as an oscillator....
Here is a battery monitor circuit which can be used to monitor the voltage of 12V lead acid batteries such as car batteries. The circuit is built around the LM3914 IC and some external components with 10 LEDs which will indicate the voltage level. Two....
Using a single 7812 ic voltage regulator and multiple outboard pass transistors, this power supply can deliver output load currents of up to 30 amps. this circuit is Using a single 7812 IC voltage regulator and multiple outboard pass transistors, this power....
Multiple unit radio control : How to make a multi-iunit radio control system....
This fm 88-108 Mhz radio amplifier is equiped with BLF 245 and can be user with a heatsink from a processor and cooler. The BLF 245 Datasheet can be downlo....
Is slowing Once a primary driver for growth, the adoption of high definition and digital cable service is starting to slow as the numbers of applications on PCs (Skype, magicJack) and smartphones. Even the increased adoption rates of MSO voice. e…§e® Is....
This circuit is based on the BA5406 audio integrated circuit and also capable to provide maximum output power of 3 watts per channel . This audio ....
TheM-8880 is a completeDTMF Transmitter/Receiver that fea- tures adjustable guard time, Automatic Tone burst mode, call progressmode, and a fully compatible 6500/6800microproces- sor Interface The receiver portion is based on the industry stan- dard M-8870....
What is DAC Digital to analog converter (DAC) is used to get analog voltage corresponding to an input digital data. Data in binary digital form can be converted to corresponding analog form by using a R-2R ladder (binary weighted resistor) network and a....
Higher bandwidth connections are made by grouping 4 or 12 pairs together, for up to 3 GB/s full-duplex connections. InfiniBand is designed to be used over a Backplane, Copper wire or Fiber. The impedance for the PWB interface or cable interface is 100W. All....
This circuit is onlyreader. It`s not programmer. You CANNOT refill, hack or any illegal thing, the telecards. The purposeof this circuit is for you to understand how a microcontroller readsthetelecard, forbuilding other electronic circuits such as"electronic....
The DIY `Plasma Gun` is a small homemade Tesla Coil gun powered by an 18V battery. It also has a special plasma discharge terminal that can fire ionized gas and flames! The whole system is mounted inside the body of an old cordless drill so that is fully....
There are plenty of digital thermometers with ·1 C displays but the accuracy is about + 1 C and you can not calibrate them. I made this thermometer circuit from components that were available at the local electronics hobby shop and it was an educational....
The circuit below consists of two multivibrators. The first multivibrator provides the speed of the change from `hee` to `haw` and operates at a low frequency....
Nowadays, it is no longer necessary to use discrete components to build oscillators. Instead, many manufacturers provide ready-made voltage-controlled oscillator (VCO) ICs that need only a few frequency-determining external components. One example is the RF....
Power Amplifier Speaker Protection Circuit Schematic While switching a power amplifier on, a loud thump sound is heard to sudden heavy discharge....
A low distortion audio frequency sine wave can be easily generated by passing the output of a simple square wave oscillator through a sharp cut off low pass filter to attenuate the odd harmonic components. The output level of the sine wave is precisely....
This application note discussed the use of SEPIC power modules to provide the power needed to drive high-brighness LED arrays. The arrays are used as display backlights and require a wide dimming range. The SEPIC approach provides an efficient and flexible....
In this project i have interfaced an GPS with AVR microcontroller, the ATtiny2313 gets the location from the GPS and display it over the LCD display...
The heart of the circuit is the two transistor flasher with frequency modulation applied to the base of the first transistor. When the pushbutton is depressed, the frequency of oscillation climbs to a peak and when the button is released, the frequency....
The LED car voltmeter consists of the filter circuit, voltage distribution filter circuit, voltage amplifier circuit and LED display circuit, see as figure 7-77. The regulator filter circuit consists of the 3-terminal IC1 and filter capacitor C1. The voltage....
I`m currently using a Gecko G540 drive module to drive the stepper motors. This module has the ability to drive up to 4 stepper motors. They label the connections as XYZA - we`ll connect the C-axis stepper to the A output and leave the Y output unconnected.....
If you need about 12, 000 volts DC for an ion generator this circuit might be the ticket. It draws power from the 120vac power line but it uses a small 6KV camera flash trigger coil. The output signal is isolated from the power line. Although the circuit can....
The mixer circuit below has 3 line inputs and 3 mic inputs. The mic inputs are suitable for low impedance 200-1000R dynamic microphones. An ECM or condenser mic can also be used, but must have bias applied via a series resistor. Circuit to Connect Telephone....
The most simple polarity protection tehnique is to connect a series diode to the power line input. The diode conducts only when the power supply protection....
This circuit was designed as an aid in parking the car near the garage wall when backing up. LED D7 illuminates when bumper-wall distance is about 20 cm. , D7+D6 illuminate at about 10 cm. and D7+D6+D5 at about 6 cm. In this manner you are alerted when....
This small circuit can be used to control model railway turnouts operated by AC voltages. A logic level in the range of 5 12 V can be used as the control signal. The coils of the turnout are switched using triacs. Changes in the logic level of the input....
The resistors R18 and R22 that should have been connected to pin 8 of U4 were mistakenly connected to pin 9. The present versions have been corrected. A minor error on the component layout is that there are two versions of C2, in the upper right and lower....
Ni-Cd Ni-MH Adjustable Constant Current Battery Charger Circuit This is a Adjustable Constant Current Ni-MH or Ni-Cd battery charger circuit. It....
The following are detailed schematics for the QScreen Controller. The QScreen Controller combines an embedded computer based on the 68HC11 microcontroller with a touch panel and LCD (liquid crystal display) graphic user interface ( GUI ) that is ideal for....
Short-wave listeners often are not able to, or allowed to, install a long-wire antenna or other large dimension antenna in or around the home. In such cases, the present active antenna, intended for the frequency range 3 30 MHz, may be found useful. The....
My modification, i have two trigger coils , two power coils, one reed switch. The wheel is 4 north pole magnet, it generates 9 radiant pulses per....
This power supply was designed for use with the Simple hybrid amp` published elsewhere in this issue. It is of course suitable for use in other applications as well. We`ve used a cascade generator for the 170 V, a switch mode supply for the 16 V, a series....
The following circuit is six LED stereo VU display diagram which build using Dot/Bar Display Driver IC LM3915. This VU disply should be connected before amplifier module circuit. You may connect this circuit at pre-amp output, tone control input/output or....
Although there are many different configurations for Crystal Oscillators, the most common are the discrete and integrated circuits Pierce and environment RLC Bridge. When needed very good frequency stability and reasonably simple circuits, the discrete....
The following circuit shows about Simple Infrared Sensor Modules Circuit Diagram. Feature: simple infrared sensor module, flame detection, ....
Neural networks are wide topic. But this small example demonstrates how to create basic neural sensor which takes resistive readings from multiply sensors and multiply it by wight factor and then sum the results. Results are compared to three level....
If you want to build a 7 to 128 demux with 3-to-8 and 4-to-16 demuxes, then put the 3 high bits of your output address into the 3-to-8, and use the outputs of that as the input enable to the individual 4-to-16 demuxes (assuming that it has an enable pin), so....
This module can be a necessary addition to the Modular Preamplifier Control Center when more than two sources need to be connected to the preamplifier chain. Four high level inputs can be selected by means of SW1 and routed to the output. The output of this....
Original components, when still good, are stable and not subjected to infant mortality. Of course everybody has his own opinions derived from past experiences. Nevertheless answers may vary depending upon several reasons: quality of the design with proper....
This project is based on the parametric equalizer proposed by Elektor in the late 80s or early 90s and later published in the book "Creations electroniques" in 1993 (Publisher: Publitronic). Their design involved three stereo potentiometers per channel,....
The first example uses the standard op-amp oscillator circuit to generate a triangular waveform which is level-shifted and fed to a comparator (e. g. LM339) to give the PWM waveform. Most people will want to use two comparators rather than one op-amp and one....
Figure shows the circuit diagram of multi tone alarm. This is basically an amplifier circuit. The central part of this circuit is the dual...
This web page describes how to install and use my ezlog data logging software. This software allows you to measure when different events happened, allowing you to synchronise the timing of different stimuli. Specifically, my software is designed to get a....
This is a variation of the the Electron Coupled Oscillator circuit, pioneered by Dow in 1931. Dow`s ECO has the screen "grounded" for RF. In this circuit, because I am using filament-type tubes instead of heater-cathode types, and because I didn`t want to....
This be power motor controller 12V circuit. with a signal MCU Control be high class voltage , about 3V. It can motor control turn advance or walk go backwards...
Friends that seek 5V 10A power supply circuit small-sized and build easy. I begs for to advise this circuit. It is 10A switching regulator by use IC L4970A. Then build easy as an example integrated readymade circuit. Important point be power supply input....
This SPI Flash Programmer can be used either for in-system programming or as a stand-alone serial flash programmer for the Atmel SPI programmable devices. The programmer hardware interface is controlled by the PC parallel port and the parallel port control....
For example, once the motion sensor picks up motion, we can program the arduino to turn on an LED, turn on a motor so that it spins, sound a buzzer off, etc. In this circuit we are doing here, for simplicity, we will simply turn on an LED once the motion....
For this project, we are going to charge a capacitor with voltage and then have the capacitor act as a temporary power source for the circuit. After we charge the capacitor with the battery, we`re going to disconnect the battery from the circuit. The....
This fm transmitter circuit is very simple and it has a acceptable transmission. The signal transited from this fm transmitter circuit can be received at almost 300 meters in open air. The circuit require a 3volts operating voltage and can be tuned anywhere....
This is a schematic diagram of a micropower voltage-controlled oscillator circuit. This circuit can generate square and triangle wave outputs and only need....
A pair of multi-range timers offering periods of up to 24 hours and beyond. Both are essentially the same. The main difference is, that when the time runs out, Version 1 energizes the relay and Version 2 de-energizes it. The first uses less power while the....
With a magnetic compass ensure that both pickups have a South polarity on the top of the pickup. Verify by reading a North polarity on the bottom of the pickup. You might rarely find both pickups with a North polarity on top. If you find one pickup with....
