New Circuits Page 8
- Page 8
-
The mixer circuit below has 2 line inputs and 2 mic inputs, 2 line outputs. The mic inputs are suitable for low impedance 200-1000R dynamic, simple mixer was designed for three dynamic microphones...
-
-
-
This simple circuit is a line-level audio signal muting switch based on a soft-action power on/off process. When the S1 switch is closed, R4, C1 and Q4 JF....
-
Digital circuits are circuits dealing with signals restricted to the extreme limits of zero and some full amount. This stands in contrast to analog circuits, in which signals are free to vary continuously between the limits imposed by power supply voltage....
-
-
-
-
-
At 9 volts the maximum stalled current of the motor types I`m going to use will be 700 mA. Since I`m not real experienced with this I want to check that I`m choosing good mosfets, I`m pretty clear on the rating, they say what current and voltage they can....
-
This is vWalker v1. The "v" standing for V, as in five. It is a five motor walker that goes towards light and avoids obstacles. The goal was to create a walker that could navigate over rough complex terrain while seeking out the brightest source of light.....
-
-
DC fan control circuit for power amplifier. Variable speed DC fan This series of works based on the input signal. Speed / fan rotation depending on size of the input signal coming from speaker lines. If there is no signal then the fan will spin slowly....
-
-
How the circuit works is simple when you send a DTMF tone to the decoder the value of pin 15 goes high for a short time this makes an excellent trigger as it supplies a few volts to pin 2 of the 555 Timer this triggers the circuit and turned the relay on for....
-
My door alarm is a small device which sounds an alarm whenever the door is opened. It is ideally used when you want privacy, if you want to know if other people enter your room while you’re in another part of the house, to wake you up if someone enters your....
-
-
This simple combination lock accommodates codes from 1-9 digits long, with the only restriction being that the same digit cannot be used twice. The circuit shows strapping for a 4-digit code, in this case "2057". Any unused switches are strapped to ground.....
-
A total of six buffer circuits (using three dual op-amp packages), five for the input channels and one for the master output channel. (2) High input impedance (particularly for the five buffers tapping channel faders). (3) Low output impedance (<600 ohm),....
-
A square wave generator with IC UA741 range shown here. The circuit uses positive feedback to the Schmitt trigger action and negative feedback to measure the time of the waveform. Let us assume that the output is high and the capacitor C1 is fully....
-
This LM3403 op amp family including LM3303 known to be a monolithic quad op amp which have high gain, a compensated internal frequency that will assure a wide range of voltages can be operated from both single and/or dual power supply. The circuit diagram....
-
Hello, I have a 3KHz-50MHz signal generator and I would like to amplify it`s 2.3mw output to +7dbm. I am looking for a broadband amplifier that can do ....
-
LM1036 is a DC controlled tone (bass/treble), volume and balance circuit for stereo applications in car radio, TV and audio systems. Component: ...
-
Cypress` Dave Van Ess cautions circuit designers about the sloppy overuse of op amps with examples and circuit theory..
-
-
All the stages involved are actually for enabling a frequency response of 20 to 100kHz, though here we wont need such high degree of frequency response, I didnt eliminate any of the stages as it wouldnt do any harm to the circuit. The first stage consisting....
-
-
Variable power supply for laboratories. With two ICs can take different output voltage and amperage..
-
Contrary to what some radio experimenters think, a bipolar regenerative design can be made to work efficiently. The major concern is the low input impedance of the detector-amplifier bipolar stage. Nevertheless, it can be easily compensated with positive....
-
The DE2 Board has eight 7-segment displays. These displays are arranged into two pairs and a group of four, with the intent of displaying numbers of various sizes. As indicated in the schematic in Figure 1, the seven segments are connected to pins on the....
-
I have a Power Factor Correction board that was taken from an old Sun Microsystem Spark450 power supply p/n 300-1359-xx. It has everything I need for a 650 watt inverter. The entire PFC circuit is not detailed in this image. The only part of the circuit I....
-
The camera rotator circuit uses a 2716 EPROM to store a table of logic values that control the motor driver (H-bridge) circuit. The EPROM data is shown in the schematic. By using the EPROM, a large number of discrete gates are eliminated. The logic table is....
-
The circuit in the diagram enables a negative voltage to be derived without the use of integrated circuits. Instead, it uses five n-p-n transistors that are driven by a 1 kHz (approx) TTL clock. When the clock input is high, transistors T1 and T2 link....
-
Since I used a ready-made inverter circuit to drive the EL sheet, this diagram is incomplete and also I`d say the battery consumption is much higher than it should be. As seen in the comments, an AVI video file is available without sound (as I used my webcam....
-
Here is the remote control tester circuit. This circuit is really a simple and easy tester for verifying the basic operations of an infrared remote control unit. ..
-
This LED flasher give similar circuit with the previous transistor LED flasher, but this circuit use a 555 integrated circuit chip as the active component. Here is the schematic diagram of the LED flasher circuit: This circuit gives alternating LED flashing,....
-
Arduino Uno a simple hack that bypasses the USB circuitry to program the device with a serial port...
-
The following circuit shows about Field Strength Meter Circuit Diagram. Features: useful for radio frequency hobbyist and enthusiast, uses only ....
-
This is another project which fullfills a need. I once built a frequency counter using plain TTL chips. That was long before the CMOS HC versions, even before LS was available. It uses only 4 chips - 3 HC TTL`s and an Atmel At90S2313 microcontroller. It has....
-
I poked around till I found an arrangement that worked. Siren circuit: I shorted the reed switch as shown. I removed the power supply and created c....
-
22 Watt Stereo Amplifier circuit diagram. This circuit can be used for audio home amplifier and car audio amplifiers. It is extremely simple design, inexpensive and very easy to build. Even a newbie hobbyst will easy assemble this circuit. The scheme given....
-
-
At some point every ham working with FM radios has need to do some tuning of the transmitter and receiver. If you are like me and lucky enough to have professional test equipment, this task is easy. If you don`t have access to professional equipment, you....
-
The working and block diagram of IC 723 Voltage Regulators is given with Circuit Diagram, and Applications,....
-
-
Building your own signal generator is a rite of passage for any analog DIYer, but it`s one I took a long time to get around to. I already have a bench signal generator, but I decided it would be useful to have a small battery powered device that I could....
-
Here is information on how to build a diy time lapse circuit which will allows a camera to automaticly take photos between a certain time interval. Those photos then can be then to create time lapse film. It is used in this circuit a 2, 5 to 3, 5 stereo....
-
RS-232 Serial Interface Status Indicator Circuit. I designed this circuit many years ago and have used it several times since. It uses a single logic IC to indicate the TXD and RXD...
-
Tiny, portable Guitar Amplifiers are useful for practice on the go and in bedroom/living room environment. Usually, they can be battery powered and feature a headphone output. This project is formed by an FET input circuitry, featuring a High/Low sensitivity....
-
Here is a simple Tachometer schematic. The basis of the frequency converter circuit-current, which converts the input signal into a proportional current measured pointer device. ..
-
Welcome to the weblog where we discuss about electronic circuits schematics, PCB design, diy kits and electronic projects diagrams. The circuit shown is a stereo FM PLL demodulator designed based on the AN7415. C1 is the input coupling capacitor to block any....
-
I have a bipolar motor, and software written for PIC 12F508 to drive unipolar motor. Is the schematic in attachment correct for this purpose? Coil A1, ....
-
The parallel interface transfers data 8 bits (or more) at the same time, using eight separate wires. It is essentially an extension of the data bus into the outside world. The parallel interface is ideal for inputting or outputting data from devices that are....
-
-
-
You won`t be disappointed with the performance of this sensitive ultrasonic receiver. It can let you listen to bugs, bats, engines, and virtually any other source of ultrasonic sounds. This circuit uses a piezo tweeter as an ultrasonic microphone, amplifier....
-
I created a simple game console that could play Pong and other games with Atari 2600 joysticks, which the Arduino would read the joystick inputs and output the data to a TV with a TVout library. I created this project just for the fact that I wanted to....
-
-
This ISP Programmer can be used either for in-system programming or as a stand-alone spi programmer for Atmel ISP programmable devices. The programming interface is compatible to STK200 ISP programmer hardware so the users of STK200 can also use the software....
-
Each tub sockets has 2 plastic nibs on the back. For each socket I drilled 2 holes into circuit material. Then I pressed the socket nibs into the drill holes. Finally I screwed the stripe of epoxy circuit material to the wood slat. The wiring diagram to....
-
99 Civic Wiring Diagram Courtesy Lights Manual PDF...
-
We`ve called it the Itsy Bitsy USB Lamp. It is such a delightfully simple idea we`re wondering why no-one ever thought of it before. It started life (and continues) as a student project at Massey University in Wellington, New Zealand - and in fact was....
-
I designed the PC Power-on Combination Lock (PCPCL) last year for my GCSE Systems & Control project. The exam board stated that we must design a product under the broad category of `Safety and Security`. I already had in mind some ideas for what I wanted to....
-
This is not a complex function and could be easily coded into a PLD or FPGA. However implementing this function into a small PLD might just use up most of the chip`s I/O pins and defeat the purpose of the PLD. That is; spending more for the PLD, than using....
-
The FX919A is a CMOS integrated circuit that contains all of the baseband signal processing and Medium Access Control (MAC) protocol functions required for a high performance 4-level FSK Wireless Packet Data Modem. It Interfaces with the modem host processor....
-
I`ve had a few requests for a quiz circuit, so here is a 4 input design which can easily be modified. Maybe, I should write the application notes in the style of a game show host. This design uses four IC`s and has four input circuits and four independent....
-
Hi, Have installed a new wired doorbell. (DESA) Heath/Zenith Model #LE-65-B. (Electronic) I also changed and added a new 16 Volt Xfrmer and a lighted pushbutton and a diode. After install, all worked fine including the ""Lighted"" pushbutton. I checked the....
-
There are many techniques to make an FM transmitter stable so it will not change its frequency as the battery runs down. The rf circuit shown below is a mini stable FM transmitter which is using a zener diode to provide accurate voltage to the oscillator....
-
Arduino can drive many kinds of motors. But the low-power signals from Arduino need to control high-power circuits to run the actual motors. Here we will give examples of ways that Arduino can control different types of motors of different sizes. A Motor....
-
I`m afraid the circuit you have there is nowhere near correct. For a start, there is no DC path to the transistor base, so no base bias current is available. Q1 collector and emitter are connected directly to the battery with no intervening impedance, so the....
-
Infrared Remote Control Switch Circuit Remote controls, specially cordless type, are very popular nowadays. Here is a simple and....
-
This article means to utilize your old PC to be come a simple controller. Many old PC like 8088 type, 8086, 80286, 80386, or even 80486 already become an obsolete systems. This board using 8-bits of LPT printer parallel data port (DP) to activate the relays.....
-
To operate a small motor used for opening and closing a pair of curtains. DC motor has six basic components: commutator, stator, rotor (a. k. a. , armature), axle, field magnet(s), and brushes. Component: LED, Diode, Resistor, Motor, Transistor. [hampatong.....
-
A dance pad, basically 4 pressure sensors (up, down, left, right). I already made the USB controller as a dance pad and whatnot, now I need to know how to hook up the actual sensors. I want the input to be pulled down to ground, so I figured that I would put....
-
In the production field, realize the automatic detection of the water level and control a critical technology that is the industrial process control, have important meanings in the automation level which improves industrial process control. In life field,....
-
This preamplifier was designed to cope with CD players, tuners, tape recorders etc. , providing an ac voltage gain of 4, in order to drive less sensitive power amplifiers. As modern Hi-Fi home equipment is frequently fitted with small loudspeaker cabinets,....
-
-
The two circuits illustrate opening a relay contact a short time after the ignition or ligh switch is turned off. The capacitor is charged and the relay is closed when the voltage at the diode anode rises to +12 volts....
-
This is the fire alarm circuit which use LDR to sense the smoke from the fire, so it can be used to detect any dark smoke. With the onset of summer season, possibilities of fire accidents go up. These fire accidents could be prevented if ti....
-
This is a typical stereo application circuit schematic of the ADAU1592, a 2-channel, bridge-tied load (BTL) switching audio power amplifier. You can apply ADAU1592 on flat panel televisions, pc audio system and/or mini-components applications..
-
The first circuit is a simple preamplifier showing the power arangements for conveying DC to the amplifier via the coaxial cable. The second circuit is a small modification so the antenna can still be used for transmitting. The actual preamplifier in this....
-
-
This paper is a tutorial discussion of IF VCO design considerations. A Colpitts topology is analyzed and used to explore performance impacts....
-
-
Hi all, I,ve built this nice circuit found in Silicon Chip magazine to test my bipolar stepper motor collections. Easy to built and works perfectly....
-
The SI4704 SI4705 enhanced FM receiver is the most advanced portable solution available today offering embedded Antenna support, digital Audio out, worldwide FM band support, and highly flexible, mature, and proven FM functionality in a simple API. The....
-
The following circuit shows about Practical Electronics/Plugins/Astable Circuit Diagram. This circuit based on the 555 Timer IC. Features: gives a pulse of about 2Hz with a very low mark-space ratio, used for any number of things, single 555 Astable, plugin....
-
This laser door alarm is based on the interruption of Laser beam. A low cost Laser pointer is used as the source of light beam. When somebody breaks the la....
-
Active power factor correction stabilize the electrical demand of a device to give the best power factor characteristic of many types of loads. To meet power factor regulation, a low cost solution should be designed. In many application, the need of high DC....
-
The following circuit shows about AM/Shortwave Radio Frequency Calibrator Circuit Diagram. This circuit based on the 74LS93 IC. Features: The ....
-
In Capacitor Power Supplies we use a Voltage Dropping Capacitor in series with the phase line. An ordinary capacitor should not be used in these applications because Mains Spikes may create holes in dielectric of ordinary capacitors and the capacitor will....
-
To make your own PWM controller, start with this sawtooth generator. Run it from a 7. 5V regulated supply to make its Vpp 5V. Feed the sawtooth to one input of a comparator and the MAP voltage to the other input of the same comparator. Let the output drive a....
-
The programmer uses serial signaling scheme to program the chip in circuit. The signaling is carried through the programming clock (PGC or ICSPCLK) and the programming data (PGD or ICSPDAT) pins. In addition, the MCLR/VPP pin is used as either a high voltage....
-
A clock-and-data recovery (CDR) circuit is used to both recover the clock from a transmitted data stream and re-time that data with the recovered clock. Such circuits are typically placed at the front-end of receiver chips to recover the clock from data sent....
-
This simple LED tester consists of a current source with a potentiometer that can be used to adjust the current. The current source is implemented using a type TL081 opamp. The output current of the opamp flows through the diode and R2. The voltage drop....
-
The circuit is composed of the parts below: (1) infrared emitterThe multi-harmonic oscillator is comoposed of 555 circuit. The oscillation frequency is decided by value of the RP1, R1, C1. The circuit`s oscillation frequency is 38kHz. (2) infrared receiver....
-
I was particularly enamored over the mechanics of the Quantized Random Voltage function. The thought occurred to me that, instead of having fixed quantization steps for each output of of the 4006 shift register, it might be fun to actually make the....
-
-
10V High-Stability Voltage Source Model power supply. Go to that page to read the explanation about above power supply related circuit diagram...
-
-
This is an application of what`s known as "random fire" technique for full phase control. The term random iskind ofmisleading. Dimming cannot be effected bytriggering the gateindiscriminately;triggering (firing)must be done synchronised with the line....
-
The clap sensor is a simple circuit that incorporates a PC microphone, a microcontroller, and an output. The following diagram shows the logical circuit design: I chose the ATtiny84 microcontroller for this project because I`m familiar with the....
-
Bridges allow your robot to control high current motors. They literally "bridge" between the low-current logic circuitry of your robot`s brain to the high current demanded from the motors. Many, but not all, use the common "H" arrangement of control....
The mixer circuit below has 2 line inputs and 2 mic inputs, 2 line outputs. The mic inputs are suitable for low impedance 200-1000R dynamic, simple mixer was designed for three dynamic microphones...
This simple circuit is a line-level audio signal muting switch based on a soft-action power on/off process. When the S1 switch is closed, R4, C1 and Q4 JF....
Digital circuits are circuits dealing with signals restricted to the extreme limits of zero and some full amount. This stands in contrast to analog circuits, in which signals are free to vary continuously between the limits imposed by power supply voltage....
At 9 volts the maximum stalled current of the motor types I`m going to use will be 700 mA. Since I`m not real experienced with this I want to check that I`m choosing good mosfets, I`m pretty clear on the rating, they say what current and voltage they can....
This is vWalker v1. The "v" standing for V, as in five. It is a five motor walker that goes towards light and avoids obstacles. The goal was to create a walker that could navigate over rough complex terrain while seeking out the brightest source of light.....
DC fan control circuit for power amplifier. Variable speed DC fan This series of works based on the input signal. Speed / fan rotation depending on size of the input signal coming from speaker lines. If there is no signal then the fan will spin slowly....
How the circuit works is simple when you send a DTMF tone to the decoder the value of pin 15 goes high for a short time this makes an excellent trigger as it supplies a few volts to pin 2 of the 555 Timer this triggers the circuit and turned the relay on for....
My door alarm is a small device which sounds an alarm whenever the door is opened. It is ideally used when you want privacy, if you want to know if other people enter your room while you’re in another part of the house, to wake you up if someone enters your....
This simple combination lock accommodates codes from 1-9 digits long, with the only restriction being that the same digit cannot be used twice. The circuit shows strapping for a 4-digit code, in this case "2057". Any unused switches are strapped to ground.....
A total of six buffer circuits (using three dual op-amp packages), five for the input channels and one for the master output channel. (2) High input impedance (particularly for the five buffers tapping channel faders). (3) Low output impedance (<600 ohm),....
A square wave generator with IC UA741 range shown here. The circuit uses positive feedback to the Schmitt trigger action and negative feedback to measure the time of the waveform. Let us assume that the output is high and the capacitor C1 is fully....
This LM3403 op amp family including LM3303 known to be a monolithic quad op amp which have high gain, a compensated internal frequency that will assure a wide range of voltages can be operated from both single and/or dual power supply. The circuit diagram....
Hello, I have a 3KHz-50MHz signal generator and I would like to amplify it`s 2.3mw output to +7dbm. I am looking for a broadband amplifier that can do ....
LM1036 is a DC controlled tone (bass/treble), volume and balance circuit for stereo applications in car radio, TV and audio systems. Component: ...
Cypress` Dave Van Ess cautions circuit designers about the sloppy overuse of op amps with examples and circuit theory..
All the stages involved are actually for enabling a frequency response of 20 to 100kHz, though here we wont need such high degree of frequency response, I didnt eliminate any of the stages as it wouldnt do any harm to the circuit. The first stage consisting....
Variable power supply for laboratories. With two ICs can take different output voltage and amperage..
Contrary to what some radio experimenters think, a bipolar regenerative design can be made to work efficiently. The major concern is the low input impedance of the detector-amplifier bipolar stage. Nevertheless, it can be easily compensated with positive....
The DE2 Board has eight 7-segment displays. These displays are arranged into two pairs and a group of four, with the intent of displaying numbers of various sizes. As indicated in the schematic in Figure 1, the seven segments are connected to pins on the....
I have a Power Factor Correction board that was taken from an old Sun Microsystem Spark450 power supply p/n 300-1359-xx. It has everything I need for a 650 watt inverter. The entire PFC circuit is not detailed in this image. The only part of the circuit I....
The camera rotator circuit uses a 2716 EPROM to store a table of logic values that control the motor driver (H-bridge) circuit. The EPROM data is shown in the schematic. By using the EPROM, a large number of discrete gates are eliminated. The logic table is....
The circuit in the diagram enables a negative voltage to be derived without the use of integrated circuits. Instead, it uses five n-p-n transistors that are driven by a 1 kHz (approx) TTL clock. When the clock input is high, transistors T1 and T2 link....
Since I used a ready-made inverter circuit to drive the EL sheet, this diagram is incomplete and also I`d say the battery consumption is much higher than it should be. As seen in the comments, an AVI video file is available without sound (as I used my webcam....
Here is the remote control tester circuit. This circuit is really a simple and easy tester for verifying the basic operations of an infrared remote control unit. ..
This LED flasher give similar circuit with the previous transistor LED flasher, but this circuit use a 555 integrated circuit chip as the active component. Here is the schematic diagram of the LED flasher circuit: This circuit gives alternating LED flashing,....
Arduino Uno a simple hack that bypasses the USB circuitry to program the device with a serial port...
The following circuit shows about Field Strength Meter Circuit Diagram. Features: useful for radio frequency hobbyist and enthusiast, uses only ....
This is another project which fullfills a need. I once built a frequency counter using plain TTL chips. That was long before the CMOS HC versions, even before LS was available. It uses only 4 chips - 3 HC TTL`s and an Atmel At90S2313 microcontroller. It has....
I poked around till I found an arrangement that worked. Siren circuit: I shorted the reed switch as shown. I removed the power supply and created c....
22 Watt Stereo Amplifier circuit diagram. This circuit can be used for audio home amplifier and car audio amplifiers. It is extremely simple design, inexpensive and very easy to build. Even a newbie hobbyst will easy assemble this circuit. The scheme given....
At some point every ham working with FM radios has need to do some tuning of the transmitter and receiver. If you are like me and lucky enough to have professional test equipment, this task is easy. If you don`t have access to professional equipment, you....
The working and block diagram of IC 723 Voltage Regulators is given with Circuit Diagram, and Applications,....
Building your own signal generator is a rite of passage for any analog DIYer, but it`s one I took a long time to get around to. I already have a bench signal generator, but I decided it would be useful to have a small battery powered device that I could....
Here is information on how to build a diy time lapse circuit which will allows a camera to automaticly take photos between a certain time interval. Those photos then can be then to create time lapse film. It is used in this circuit a 2, 5 to 3, 5 stereo....
RS-232 Serial Interface Status Indicator Circuit. I designed this circuit many years ago and have used it several times since. It uses a single logic IC to indicate the TXD and RXD...
Tiny, portable Guitar Amplifiers are useful for practice on the go and in bedroom/living room environment. Usually, they can be battery powered and feature a headphone output. This project is formed by an FET input circuitry, featuring a High/Low sensitivity....
Here is a simple Tachometer schematic. The basis of the frequency converter circuit-current, which converts the input signal into a proportional current measured pointer device. ..
Welcome to the weblog where we discuss about electronic circuits schematics, PCB design, diy kits and electronic projects diagrams. The circuit shown is a stereo FM PLL demodulator designed based on the AN7415. C1 is the input coupling capacitor to block any....
I have a bipolar motor, and software written for PIC 12F508 to drive unipolar motor. Is the schematic in attachment correct for this purpose? Coil A1, ....
The parallel interface transfers data 8 bits (or more) at the same time, using eight separate wires. It is essentially an extension of the data bus into the outside world. The parallel interface is ideal for inputting or outputting data from devices that are....
You won`t be disappointed with the performance of this sensitive ultrasonic receiver. It can let you listen to bugs, bats, engines, and virtually any other source of ultrasonic sounds. This circuit uses a piezo tweeter as an ultrasonic microphone, amplifier....
I created a simple game console that could play Pong and other games with Atari 2600 joysticks, which the Arduino would read the joystick inputs and output the data to a TV with a TVout library. I created this project just for the fact that I wanted to....
This ISP Programmer can be used either for in-system programming or as a stand-alone spi programmer for Atmel ISP programmable devices. The programming interface is compatible to STK200 ISP programmer hardware so the users of STK200 can also use the software....
Each tub sockets has 2 plastic nibs on the back. For each socket I drilled 2 holes into circuit material. Then I pressed the socket nibs into the drill holes. Finally I screwed the stripe of epoxy circuit material to the wood slat. The wiring diagram to....
We`ve called it the Itsy Bitsy USB Lamp. It is such a delightfully simple idea we`re wondering why no-one ever thought of it before. It started life (and continues) as a student project at Massey University in Wellington, New Zealand - and in fact was....
I designed the PC Power-on Combination Lock (PCPCL) last year for my GCSE Systems & Control project. The exam board stated that we must design a product under the broad category of `Safety and Security`. I already had in mind some ideas for what I wanted to....
This is not a complex function and could be easily coded into a PLD or FPGA. However implementing this function into a small PLD might just use up most of the chip`s I/O pins and defeat the purpose of the PLD. That is; spending more for the PLD, than using....
The FX919A is a CMOS integrated circuit that contains all of the baseband signal processing and Medium Access Control (MAC) protocol functions required for a high performance 4-level FSK Wireless Packet Data Modem. It Interfaces with the modem host processor....
I`ve had a few requests for a quiz circuit, so here is a 4 input design which can easily be modified. Maybe, I should write the application notes in the style of a game show host. This design uses four IC`s and has four input circuits and four independent....
Hi, Have installed a new wired doorbell. (DESA) Heath/Zenith Model #LE-65-B. (Electronic) I also changed and added a new 16 Volt Xfrmer and a lighted pushbutton and a diode. After install, all worked fine including the ""Lighted"" pushbutton. I checked the....
There are many techniques to make an FM transmitter stable so it will not change its frequency as the battery runs down. The rf circuit shown below is a mini stable FM transmitter which is using a zener diode to provide accurate voltage to the oscillator....
Arduino can drive many kinds of motors. But the low-power signals from Arduino need to control high-power circuits to run the actual motors. Here we will give examples of ways that Arduino can control different types of motors of different sizes. A Motor....
I`m afraid the circuit you have there is nowhere near correct. For a start, there is no DC path to the transistor base, so no base bias current is available. Q1 collector and emitter are connected directly to the battery with no intervening impedance, so the....
Infrared Remote Control Switch Circuit Remote controls, specially cordless type, are very popular nowadays. Here is a simple and....
This article means to utilize your old PC to be come a simple controller. Many old PC like 8088 type, 8086, 80286, 80386, or even 80486 already become an obsolete systems. This board using 8-bits of LPT printer parallel data port (DP) to activate the relays.....
To operate a small motor used for opening and closing a pair of curtains. DC motor has six basic components: commutator, stator, rotor (a. k. a. , armature), axle, field magnet(s), and brushes. Component: LED, Diode, Resistor, Motor, Transistor. [hampatong.....
A dance pad, basically 4 pressure sensors (up, down, left, right). I already made the USB controller as a dance pad and whatnot, now I need to know how to hook up the actual sensors. I want the input to be pulled down to ground, so I figured that I would put....
In the production field, realize the automatic detection of the water level and control a critical technology that is the industrial process control, have important meanings in the automation level which improves industrial process control. In life field,....
This preamplifier was designed to cope with CD players, tuners, tape recorders etc. , providing an ac voltage gain of 4, in order to drive less sensitive power amplifiers. As modern Hi-Fi home equipment is frequently fitted with small loudspeaker cabinets,....
The two circuits illustrate opening a relay contact a short time after the ignition or ligh switch is turned off. The capacitor is charged and the relay is closed when the voltage at the diode anode rises to +12 volts....
This is the fire alarm circuit which use LDR to sense the smoke from the fire, so it can be used to detect any dark smoke. With the onset of summer season, possibilities of fire accidents go up. These fire accidents could be prevented if ti....
This is a typical stereo application circuit schematic of the ADAU1592, a 2-channel, bridge-tied load (BTL) switching audio power amplifier. You can apply ADAU1592 on flat panel televisions, pc audio system and/or mini-components applications..
The first circuit is a simple preamplifier showing the power arangements for conveying DC to the amplifier via the coaxial cable. The second circuit is a small modification so the antenna can still be used for transmitting. The actual preamplifier in this....
This paper is a tutorial discussion of IF VCO design considerations. A Colpitts topology is analyzed and used to explore performance impacts....
Hi all, I,ve built this nice circuit found in Silicon Chip magazine to test my bipolar stepper motor collections. Easy to built and works perfectly....
The SI4704 SI4705 enhanced FM receiver is the most advanced portable solution available today offering embedded Antenna support, digital Audio out, worldwide FM band support, and highly flexible, mature, and proven FM functionality in a simple API. The....
The following circuit shows about Practical Electronics/Plugins/Astable Circuit Diagram. This circuit based on the 555 Timer IC. Features: gives a pulse of about 2Hz with a very low mark-space ratio, used for any number of things, single 555 Astable, plugin....
This laser door alarm is based on the interruption of Laser beam. A low cost Laser pointer is used as the source of light beam. When somebody breaks the la....
Active power factor correction stabilize the electrical demand of a device to give the best power factor characteristic of many types of loads. To meet power factor regulation, a low cost solution should be designed. In many application, the need of high DC....
The following circuit shows about AM/Shortwave Radio Frequency Calibrator Circuit Diagram. This circuit based on the 74LS93 IC. Features: The ....
In Capacitor Power Supplies we use a Voltage Dropping Capacitor in series with the phase line. An ordinary capacitor should not be used in these applications because Mains Spikes may create holes in dielectric of ordinary capacitors and the capacitor will....
To make your own PWM controller, start with this sawtooth generator. Run it from a 7. 5V regulated supply to make its Vpp 5V. Feed the sawtooth to one input of a comparator and the MAP voltage to the other input of the same comparator. Let the output drive a....
The programmer uses serial signaling scheme to program the chip in circuit. The signaling is carried through the programming clock (PGC or ICSPCLK) and the programming data (PGD or ICSPDAT) pins. In addition, the MCLR/VPP pin is used as either a high voltage....
A clock-and-data recovery (CDR) circuit is used to both recover the clock from a transmitted data stream and re-time that data with the recovered clock. Such circuits are typically placed at the front-end of receiver chips to recover the clock from data sent....
This simple LED tester consists of a current source with a potentiometer that can be used to adjust the current. The current source is implemented using a type TL081 opamp. The output current of the opamp flows through the diode and R2. The voltage drop....
The circuit is composed of the parts below: (1) infrared emitterThe multi-harmonic oscillator is comoposed of 555 circuit. The oscillation frequency is decided by value of the RP1, R1, C1. The circuit`s oscillation frequency is 38kHz. (2) infrared receiver....
I was particularly enamored over the mechanics of the Quantized Random Voltage function. The thought occurred to me that, instead of having fixed quantization steps for each output of of the 4006 shift register, it might be fun to actually make the....
10V High-Stability Voltage Source Model power supply. Go to that page to read the explanation about above power supply related circuit diagram...
This is an application of what`s known as "random fire" technique for full phase control. The term random iskind ofmisleading. Dimming cannot be effected bytriggering the gateindiscriminately;triggering (firing)must be done synchronised with the line....
The clap sensor is a simple circuit that incorporates a PC microphone, a microcontroller, and an output. The following diagram shows the logical circuit design: I chose the ATtiny84 microcontroller for this project because I`m familiar with the....
Bridges allow your robot to control high current motors. They literally "bridge" between the low-current logic circuitry of your robot`s brain to the high current demanded from the motors. Many, but not all, use the common "H" arrangement of control....
