Top Circuits Page 142
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Simple IR capture for multitasking operating systems The IR Widget captures the infrared signals used by remote controls. It operates in a way that makes i....
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-
The goal of this project is to create a device that is capable of outputing VGA signals to a CRT monitor inorder to display figures, text and characters. T....
-
The Tiny Remoteis a very compact infrared remote control with only two buttons to control an iRobot Roomba. It produces three different infrare....
-
-
Actually this is the another version of my older DVM project that was based on PIC12F683. The older version displays the measured voltage on a LCD that is driven serially by PIC12F683 using 3 I/O pins. The new one uses PIC16F688 microcontroller that doesn`t....
-
These is the demo board I made based on PIC16F887 microcontroller. It is a good project for starting with PIC uC`s. It has a bootloader so an external programmer is not needed. The circuit is simple but it will let you explore some of the major features that....
-
-
VU Meter Driver PCB Completed Board Stereo for Two VU Meters Audio Amplifier. VU Meter Driver PCB Completed TA7318P Board Stereo for Two VU Meters Features : Specifications:Power voltage: AC 20V to AC 26V(not more than 26V)size : 52 x 67 x 32mmIt can connect....
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This project has come about from my desire to control my home heating from work. As I have a VPN between work and home a straightforward relay controlled from a PC would seem the easiest solution. However I also wanted a control unit that I could operate in....
-
This neat little circuit provides 8 LEDs directly driven from the PIC along with a single mode control switch. The firmware elsewhere on this page drives the LEDs with a 5 bit PWM signal providing each of the 8 LED channels with four levels of intensity;....
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This is a small circuit insect repellent, mosquitoes and birds, or other methods to produce high frequency audio signals. Interfere with the hearing of insects. Make it insufferable, wings to escape in the end. Operation of this circuit is used IC1 number....
-
How to get an LED-Wiz to control pinball solenoids. Rottendog Amusements makes modern replacement Driver Boards like this Williams WPC89/WPC-S replacement. While it is better than the originals, this board is still rather large, though it does handle more....
-
This is a circuit for a tone control using 3 band equalizers. This circuit is based on single chip op amps LF351. This circuit having three ranges, bass, middle and treble controls. This is the figure of the circuit; With a single chip op amps LF351, it is....
-
This is a design circuit for Low Distortion Crystal Oscillator circuit. This circuit generate a sine wave that has low phase noise and distortion. This circuit can be used to perform a crystal with less than 1mV dissipated in crystal. The crystal is used to....
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-
This 860 MHz Phase Locked Loop (PLL) oscillator circuit is for 1200 MHz transverter`s local oscillator with 435MHz rigs. The oscillator circuit uses PLL synthesizer IC`s of Toshiba for PLL circuit. TC9122P is easy to use preset counter for determining....
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This is a circuit of subwoofer active filter circuit is a 24 dB octave filter with a Bessel character and cutoff frequency of 200 Hz. So, if you are interested in experimenting with audio circuits in subwoofer range, this circuit is for you. This is the....
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Pinout of Smart card (Sim card) to PC adapter cable (sim reader/writer) schematic and layout of 6 pin Simcard special connector and 9 pin D-SUB female connectorused to to connect computers to ISO 7816 compatible chip card systems (e.g. GSM mobile phones or....
-
Pinout of OBD-2 ISO 14230-4 (ISO-9141-2, KWP2000) RS-232 cable schematic and layout of 16 pin car OBD2 special connectorshould be suitable to vehicles of most European and Asian manufacturers. Alfa Romeo, Audi, BMW, Citroen, Fiat, Honda, Hyundai, Jaguar....
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Assume one of the transistor, say TR1 become conducting at first. Now, since TR1 is conducting, it`s collector emiter voltage should be ideally zero, but any way, it will be around 0. 1 volt and it`s base emiter voltage is +0. 6v. Now the capacitor c1 will....
-
The boot-cloner is a program compiled and burnt with the Arduino IDE, that copies part of it`s flash memory onto another microcontroller. The bootloader can be written to a new microcontroller by the Arduino, instead of burning the bootloader onto new....
-
This post is based on the work made previously by tomek in wiring LCD displays using 4 bits. The basic idea is to group the 7 pins that are needed to drive the LCD in only 3 using a shift register. This is a cheap alternative to serial LCDs. The schematic....
-
Not drive a solenoid directly from your Arduino. It requires more current than you can provide and produces destructive voltages when it is switched off. There is a simple solution. The solenoid I was testing with is a 12 volt solenoid the size of my thumb.....
-
One method of controlling power to ac circuits uses a triac to turn the power on and off at precisely timed intervals that are synchronized with the ac signal. This method is called AC phase control. It is the method used in many light dimmer and heater....
-
When Q1 is active, a larger current begins to flow through L1 to GND. When Q1 is switched off, the current through L1 trys to remain the same as it was, causing an increased voltage. By varying the PWM duty cycle, the current through L1 and output voltage....
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This is the first color, graphic LCD display I worked with. I made some assumptions when I first began working with it. From previously working with TTL logic in college, I assumed CS and RESET could just be tied high for simplicity. It wont work if you do....
-
A step motor controller based on the schematics found on the Arduino Web site. First I try the 2 pins one for bipolar stepper motor. I wont be able to make it work, even less with the library available on the site. Maybe I`m dumb and I really dont understand....
-
This is a starting method that reduces the starting current and starting torque. The device normally consists of three contactors, an overload relay and a timer for setting the time in the star-position (starting position). The motor must be delta connected....
-
An almost identical recreation of the SAP-1 Simple As Possible microprocessor, as published in Digital Computer Electronics by Albert Malvino and Jerald Brown. While the book is out of print an "ebook" can be found fairly easily if you know where to look. I....
-
To guarantee reliability, the server system designer must consider hot-swap circuit parasitics and the associated transient behavior. The designer should use a TVS (transient voltage suppressor) diode clamp at the line card input. Experimental measurements....
-
As the market strives for lighter, more compact wireless and portable devices with more ingenious features crammed into an ever-tighter space, a related quest ensues for the next power supply innovation ” a powerful, compact, long-lasting, economical and....
-
Input current for a passive PFC circuit is insensitive to changes in the output ripple - so it requires a smaller inductance than previous circuits....
-
Though stepdown converters - buck converters - are extremely popular, the rules of thumb and calculations that speed their design can be hard to find....
-
High power IGBT modules employ hybrid IC gate drives including protection circuits that implement desaturation detection or real time control....
-
Using the latest generation of trench and polar power MOSFET technologies, we have developed both trench and polar P-Channel power MOSFETs that retain all the features of comparable N-Channel power MOSFETs such as very fast switching, voltage control, ease....
-
Distributed power systems are prevalent in telecommunications, networking, and high-end server applications and utilize a 48 V bus voltage adopted from the telecom industry. From the 48 V bus, a number of isolated point of load (POL) converters power the end....
-
In the first installment of this two-part article on paralleling eGaN FETs, five basic designs, utilizing four EPC2001 (100 V, 25 A) paralleled devices per switch in a half bridge configuration were presented with experimental validation. In this second....
-
-
Hbrightness metal halide lamps typically have an efficacy of greater than 100 lumens/watt and have a lifetime of 20,000 hours. HID lamps produce light using a technique similar to that used in fluorescent lamps where mercury atoms are excited by an....
-
There is great sensitivity to operating costs when dealing with high-powered commercial lighting. In these applications, there is increased emphasis on energy efficiency and ac line power factor because these parameters impact operating expenses. The....
-
Fluorescent dimming systems can satisfy visual comfort, and reduce utility costs through daylight harvesting, demand reduction, scheduled dimming, and other strategies. A dimming electronic ballast is an essential part of this system. To perform dimming....
-
The electric utility grid-connected photovoltaic (PV) system is an important technology for future renewable energy applications....
-
A signal-injection circuit for control-loop analysis is flat from dc to 200 kHz, isolated from chassis ground and easily constructed with a readily available instrumentation amplifier....
-
Long used to improve efficiency, reduce ripple, and shrink capacitor and inductor size in buck converters, the multiphase approach can provide the same benefits for boost converters....
-
An interface circuit based on optocouplers provides galvanic isolation and common-mode noise rejection between low-voltage microcontroller units and high-voltage integrated power modules in motor-drive applications. Optocouplers provide high-voltage....
-
Isolation amplifiers provide an effective method to protect IGBTs against over-current, overload and overvoltage conditions in addition to their current/voltage sensing function. Using these devices together with feature-rich gate drivers, you can implement....
-
Single-ended primary inductance converter (SEPIC) topology is a good choice for automotive power systems that require an output voltage between the low and high values of the input voltage. SEPIC topology fits this application because its duty ratio can be....
-
A PWM boost converter in a simple controller has a DC path from input VIN to VOUT, which is utilized for high-efficiency power conversion....
-
A Bridgeless PFC converter based on a novel switching method eliminates full-bridge rectifiers and helps to reduce the size and cost of switching power supplies....
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Through simple circuit modifications, designers can use peak current limiting to produce a constant current source....
-
12 Volt / 2 A Switching Power Supply power supply. Go to that page to read the explanation about above power supply related circuit diagram...
-
10V High-Stability Voltage Source Model power supply. Go to that page to read the explanation about above power supply related circuit diagram...
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The input transformer is likely to be the most expensive part of the entire project. As an alternative, a couple of 12 Volt car batteries could be used. The input voltage to the regulator must be at least several volts higher than the output voltage (12V) so....
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The IC8211 presents the voltage reference and regulator amplifier, although Q1 will probably be the series pass transistor. R1 defines the output current of the IC8211, although C1 and C2 present loop stability and as well act to suppress feedthrough of....
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-
A negative output voltage dc to dc converter generates a -5V output at pin A. In order to generate -5V at point A. the primary of the transformer must fly back to a diode drop more negative than -5V. If the transformer has a tightly coupled I : 1 turns....
-
-
A high voltage power supply can be a really beneficial source which could be properly utilized in a lot of applications like biasing of gas-discharge tubes and radiation detectors and so on. Such a power supply could also be utilized for protection of....
-
Above diagram is the circuit of Lithium-ion (Li-ion) battery charger which built based single chip MAX1879. This is the simple and low cost battery charger for single-cell Li+ battery that does not dissipate power (no heat. The MAX1879, in conjunction with....
-
-
Most all power supplies regulate either their output voltage or output current at a constant level, depending on the load resistance relative to the power supply`s output voltage and current settings. This can be summarized as follows: To accomplish this....
-
A fluorescent lamp has quite a few unique requirements to get it to start up and stay illuminated. How does this flyback converter manage to do these things I had first looked around to see if I could find a schematic for this fluorescent lamp assembly, but....
-
Interactive voice response (IVR) system is a communication system which provides automated telephone call access to specified computer database information. Interactive Voice Response is a technology that allows computer to detect DTMF (Dual-tone....
-
The tuner is programmable via I ²C-Bus and provides a FBAS signal at its output. There is also the homepage of Georg Acher containing information about this tuner. I have developed a control circuit for this tuner which uses the AT89C2051 from Atmel.....
-
Microcontroller understands only digital language. However, the inputs available from the environment to the microcontroller are mostly analog in nature, i. e. , they vary continuously with time. In order to understand the inputs by the digital processor, a....
-
-
Hi all, I just notice that this 12v switching power supply schematic is hot, some people discuss it in top forum like dp.12v Switching Power Supply....
-
Hello world!, The more you understand about any subject, the more interesting it becomes. As you read this article you`ll find that the subject of....
-
Welcome to my small blog, This blog explains a few things about smps circuit diagram, and if you`re interested, then this is worth reading, because....
-
Welcome folks, today I want post interesting topic about switching power supply circuit diagram for you who want to learn more you can search....
-
Greeting, This post summarize the work of switching power supply schematic diagram experts who are completely familiar with all the aspects of....
-
PLC input cards rarely supply power, it means that needs external power supply for the inputs and sensors. Below is an Input card and Ladder Logic diagram that shows how to connect an AC input card. The PLC inputs must convert a variety of logic levels tothe....
-
Discussion about application of microcontroler PIC16F84 both for Control or Robotics and How to make Programmer of Microcontroller PIC16F84/A. The solar engine is commonly used as an onboard power plant for BEAM-type robots. Sometime called living robots.....
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This is a design circuit for a doorbell. This circuit can produces a sound like bird sound. This circuit controlled by transistor NPN. This is the figure of the circuit. The operation of the circuit is beginning when P1 is of experimental value. Start with....
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This is a design for a door alarm circuit, but in this design using electronic system. This circuit uses a synthesized sound chip from Holtek, the HT-2811. This circuit reproduces the sound of a "ding-dong" chiming doorbell. Additionally, the circuit....
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This is a design schematic of a Crystal Colpitts oscillator can be implemented using a transistor and a parallel mode crystal. This is the figure of the circuit. In this circuit, the crystal is use as an inductance. A large value capacitive divider is used....
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This is a design circuit for sine wave oscillators that will provide both a sine and square wave output for frequencies from below 20 Hz to above 20 KHz. The frequency of oscillation is easily tuned by varying a single resistor. This circuit is controlled by....
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This is a circuit that is known as wien bridge oscillator circuit. The circuit has positive and negative feedback loop. This circuit is work with control by op amp. This is the figure of the circuit. The circuit oscillates at a frequency determined by the RC....
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This is a circuit for antenna UHF TV that can be give 15dB preamp. This circuit is built by transistor and low components. This is the figure of the circuit. The circuit above is formed based on BF180 UHF Transistor. The first stage is a band pass filter....
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This is a design circuit for converter that using for a very practical LM2623A ratio adaptive circuit to drive a digital camera motor. It produces 5 volts from input voltages ranging between 1. 8 and 4. 5 volts. This is the figure of the circuit; The duty....
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A gyrator is a circuit using active devices and transistors to simulate an inductor. In this case the gyrator is the transistor acting with R1, R3 and C2. It could just as easily be a unity gain op-amp (which gives superior performance). The circuit includes....
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This device ensure a lot of implementation possibilities because it has wide input voltage range and the large maximum output current at a wide output voltage range. It has long battery life and low power strain because of it`s high efficiency and....
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This circuit was designed to detect the approximate percentage of salt contained in a liquid. After careful setting it can be useful to persons needing a quick, rough indication of the salt content in liquid foods for diet purposes etc. This circuit is using....
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This LED VU Meter (volume-unit) is capable of monitoring and displaying power levels present at the speaker terminals of an stereo audio power amplifier. The levels are displayed in ten discrete steps using 10 LEDs for each channel. This project is designed....
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This is a circuit for high quality power supply with a continuously variable stabilized output adjustable at any value between 0 and 30VDC. The circuit also incorporates an electronic output current limiter that effectively controls the output current from a....
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This is a circuit for 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 laser path, the alarm will be generated for few seconds. This is the figure of the....
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The LT6552 is a video difference amplifier optimized for low voltage single supply operation. The LT6552 features 75MHz 3dB bandwidth, 600V/ µs slew rate, and ±70mA output current making it ideal for driving cables directly. This circuit maps the sync on Y....
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This is a circuit of a voltage-controlled oscillator (VCO) that uses the 555 timer IC as the main component. As expected, the 555 timer is configured as an astable multi vibrator to be able to serve as an oscillator. An astable multi vibrator is just a....
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This is a circuit for RF (radio frequency) transmitter experiment, watt meter is useful for optimizing the transmitter circuit. A simple RF watt meter circuit is shown in the schematic diagram below. Because circuit is not frequency sensitive, calibration is....
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This is a circuit for universal decoder that has functions as either a dual 1-of-4 decoder or as a single 1-of-8 decoder, depending on the signal applied to the Mode Control (M) input. Here`s the figure of the test circuit; In the dual mode, each half has a....
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A simple fire alarm circuit based on a LDR and lamp pair for sensing the fire. The alarm works by sensing the smoke produced during fire. The circuit produces an audible alarm when the fire breaks out with smoke. When there is no smoke the light from the....
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A 100 Watt inverter circuit using minimum number of components. I think it is quite difficult to make a decent one like this with further less components. Here we use CD 4047 IC from Texas Instruments for generating the 100 Hz pulses and four 2N3055....
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This circuit has been designed to provide a clearly visible light, formed by 13 high efficiency flashing LEDs arranged in a pseudo-rotating order. Due to low voltage, low drain battery operation and small size, the device is suitable for mounting on bicycles....
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This quad amplifier is actually intended to be used in a car, but it can naturally also be used for a variety of other medium-power applications. The TDA7375A can be successfully used in all situations in which a reasonable amount of audio power is desired....
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The integrated output amplifier described in this article consists of little more than one integrated circuit. It is intended especially for use in motor vehicles and other battery-operated applications. Although it appears simple and hardly worth looking....
Simple IR capture for multitasking operating systems The IR Widget captures the infrared signals used by remote controls. It operates in a way that makes i....
The goal of this project is to create a device that is capable of outputing VGA signals to a CRT monitor inorder to display figures, text and characters. T....
The Tiny Remoteis a very compact infrared remote control with only two buttons to control an iRobot Roomba. It produces three different infrare....
Actually this is the another version of my older DVM project that was based on PIC12F683. The older version displays the measured voltage on a LCD that is driven serially by PIC12F683 using 3 I/O pins. The new one uses PIC16F688 microcontroller that doesn`t....
These is the demo board I made based on PIC16F887 microcontroller. It is a good project for starting with PIC uC`s. It has a bootloader so an external programmer is not needed. The circuit is simple but it will let you explore some of the major features that....
VU Meter Driver PCB Completed Board Stereo for Two VU Meters Audio Amplifier. VU Meter Driver PCB Completed TA7318P Board Stereo for Two VU Meters Features : Specifications:Power voltage: AC 20V to AC 26V(not more than 26V)size : 52 x 67 x 32mmIt can connect....
This project has come about from my desire to control my home heating from work. As I have a VPN between work and home a straightforward relay controlled from a PC would seem the easiest solution. However I also wanted a control unit that I could operate in....
This neat little circuit provides 8 LEDs directly driven from the PIC along with a single mode control switch. The firmware elsewhere on this page drives the LEDs with a 5 bit PWM signal providing each of the 8 LED channels with four levels of intensity;....
This is a small circuit insect repellent, mosquitoes and birds, or other methods to produce high frequency audio signals. Interfere with the hearing of insects. Make it insufferable, wings to escape in the end. Operation of this circuit is used IC1 number....
How to get an LED-Wiz to control pinball solenoids. Rottendog Amusements makes modern replacement Driver Boards like this Williams WPC89/WPC-S replacement. While it is better than the originals, this board is still rather large, though it does handle more....
This is a circuit for a tone control using 3 band equalizers. This circuit is based on single chip op amps LF351. This circuit having three ranges, bass, middle and treble controls. This is the figure of the circuit; With a single chip op amps LF351, it is....
This is a design circuit for Low Distortion Crystal Oscillator circuit. This circuit generate a sine wave that has low phase noise and distortion. This circuit can be used to perform a crystal with less than 1mV dissipated in crystal. The crystal is used to....
This 860 MHz Phase Locked Loop (PLL) oscillator circuit is for 1200 MHz transverter`s local oscillator with 435MHz rigs. The oscillator circuit uses PLL synthesizer IC`s of Toshiba for PLL circuit. TC9122P is easy to use preset counter for determining....
Pinout of Smart card (Sim card) to PC adapter cable (sim reader/writer) schematic and layout of 6 pin Simcard special connector and 9 pin D-SUB female connectorused to to connect computers to ISO 7816 compatible chip card systems (e.g. GSM mobile phones or....
Pinout of OBD-2 ISO 14230-4 (ISO-9141-2, KWP2000) RS-232 cable schematic and layout of 16 pin car OBD2 special connectorshould be suitable to vehicles of most European and Asian manufacturers. Alfa Romeo, Audi, BMW, Citroen, Fiat, Honda, Hyundai, Jaguar....
Assume one of the transistor, say TR1 become conducting at first. Now, since TR1 is conducting, it`s collector emiter voltage should be ideally zero, but any way, it will be around 0. 1 volt and it`s base emiter voltage is +0. 6v. Now the capacitor c1 will....
The boot-cloner is a program compiled and burnt with the Arduino IDE, that copies part of it`s flash memory onto another microcontroller. The bootloader can be written to a new microcontroller by the Arduino, instead of burning the bootloader onto new....
This post is based on the work made previously by tomek in wiring LCD displays using 4 bits. The basic idea is to group the 7 pins that are needed to drive the LCD in only 3 using a shift register. This is a cheap alternative to serial LCDs. The schematic....
Not drive a solenoid directly from your Arduino. It requires more current than you can provide and produces destructive voltages when it is switched off. There is a simple solution. The solenoid I was testing with is a 12 volt solenoid the size of my thumb.....
One method of controlling power to ac circuits uses a triac to turn the power on and off at precisely timed intervals that are synchronized with the ac signal. This method is called AC phase control. It is the method used in many light dimmer and heater....
When Q1 is active, a larger current begins to flow through L1 to GND. When Q1 is switched off, the current through L1 trys to remain the same as it was, causing an increased voltage. By varying the PWM duty cycle, the current through L1 and output voltage....
This is the first color, graphic LCD display I worked with. I made some assumptions when I first began working with it. From previously working with TTL logic in college, I assumed CS and RESET could just be tied high for simplicity. It wont work if you do....
A step motor controller based on the schematics found on the Arduino Web site. First I try the 2 pins one for bipolar stepper motor. I wont be able to make it work, even less with the library available on the site. Maybe I`m dumb and I really dont understand....
This is a starting method that reduces the starting current and starting torque. The device normally consists of three contactors, an overload relay and a timer for setting the time in the star-position (starting position). The motor must be delta connected....
An almost identical recreation of the SAP-1 Simple As Possible microprocessor, as published in Digital Computer Electronics by Albert Malvino and Jerald Brown. While the book is out of print an "ebook" can be found fairly easily if you know where to look. I....
To guarantee reliability, the server system designer must consider hot-swap circuit parasitics and the associated transient behavior. The designer should use a TVS (transient voltage suppressor) diode clamp at the line card input. Experimental measurements....
As the market strives for lighter, more compact wireless and portable devices with more ingenious features crammed into an ever-tighter space, a related quest ensues for the next power supply innovation ” a powerful, compact, long-lasting, economical and....
Input current for a passive PFC circuit is insensitive to changes in the output ripple - so it requires a smaller inductance than previous circuits....
Though stepdown converters - buck converters - are extremely popular, the rules of thumb and calculations that speed their design can be hard to find....
High power IGBT modules employ hybrid IC gate drives including protection circuits that implement desaturation detection or real time control....
Using the latest generation of trench and polar power MOSFET technologies, we have developed both trench and polar P-Channel power MOSFETs that retain all the features of comparable N-Channel power MOSFETs such as very fast switching, voltage control, ease....
Distributed power systems are prevalent in telecommunications, networking, and high-end server applications and utilize a 48 V bus voltage adopted from the telecom industry. From the 48 V bus, a number of isolated point of load (POL) converters power the end....
In the first installment of this two-part article on paralleling eGaN FETs, five basic designs, utilizing four EPC2001 (100 V, 25 A) paralleled devices per switch in a half bridge configuration were presented with experimental validation. In this second....
Hbrightness metal halide lamps typically have an efficacy of greater than 100 lumens/watt and have a lifetime of 20,000 hours. HID lamps produce light using a technique similar to that used in fluorescent lamps where mercury atoms are excited by an....
There is great sensitivity to operating costs when dealing with high-powered commercial lighting. In these applications, there is increased emphasis on energy efficiency and ac line power factor because these parameters impact operating expenses. The....
Fluorescent dimming systems can satisfy visual comfort, and reduce utility costs through daylight harvesting, demand reduction, scheduled dimming, and other strategies. A dimming electronic ballast is an essential part of this system. To perform dimming....
The electric utility grid-connected photovoltaic (PV) system is an important technology for future renewable energy applications....
A signal-injection circuit for control-loop analysis is flat from dc to 200 kHz, isolated from chassis ground and easily constructed with a readily available instrumentation amplifier....
Long used to improve efficiency, reduce ripple, and shrink capacitor and inductor size in buck converters, the multiphase approach can provide the same benefits for boost converters....
An interface circuit based on optocouplers provides galvanic isolation and common-mode noise rejection between low-voltage microcontroller units and high-voltage integrated power modules in motor-drive applications. Optocouplers provide high-voltage....
Isolation amplifiers provide an effective method to protect IGBTs against over-current, overload and overvoltage conditions in addition to their current/voltage sensing function. Using these devices together with feature-rich gate drivers, you can implement....
Single-ended primary inductance converter (SEPIC) topology is a good choice for automotive power systems that require an output voltage between the low and high values of the input voltage. SEPIC topology fits this application because its duty ratio can be....
A PWM boost converter in a simple controller has a DC path from input VIN to VOUT, which is utilized for high-efficiency power conversion....
A Bridgeless PFC converter based on a novel switching method eliminates full-bridge rectifiers and helps to reduce the size and cost of switching power supplies....
Through simple circuit modifications, designers can use peak current limiting to produce a constant current source....
12 Volt / 2 A Switching Power Supply power supply. Go to that page to read the explanation about above power supply related circuit diagram...
10V High-Stability Voltage Source Model power supply. Go to that page to read the explanation about above power supply related circuit diagram...
The input transformer is likely to be the most expensive part of the entire project. As an alternative, a couple of 12 Volt car batteries could be used. The input voltage to the regulator must be at least several volts higher than the output voltage (12V) so....
The IC8211 presents the voltage reference and regulator amplifier, although Q1 will probably be the series pass transistor. R1 defines the output current of the IC8211, although C1 and C2 present loop stability and as well act to suppress feedthrough of....
A negative output voltage dc to dc converter generates a -5V output at pin A. In order to generate -5V at point A. the primary of the transformer must fly back to a diode drop more negative than -5V. If the transformer has a tightly coupled I : 1 turns....
A high voltage power supply can be a really beneficial source which could be properly utilized in a lot of applications like biasing of gas-discharge tubes and radiation detectors and so on. Such a power supply could also be utilized for protection of....
Above diagram is the circuit of Lithium-ion (Li-ion) battery charger which built based single chip MAX1879. This is the simple and low cost battery charger for single-cell Li+ battery that does not dissipate power (no heat. The MAX1879, in conjunction with....
Most all power supplies regulate either their output voltage or output current at a constant level, depending on the load resistance relative to the power supply`s output voltage and current settings. This can be summarized as follows: To accomplish this....
A fluorescent lamp has quite a few unique requirements to get it to start up and stay illuminated. How does this flyback converter manage to do these things I had first looked around to see if I could find a schematic for this fluorescent lamp assembly, but....
Interactive voice response (IVR) system is a communication system which provides automated telephone call access to specified computer database information. Interactive Voice Response is a technology that allows computer to detect DTMF (Dual-tone....
The tuner is programmable via I ²C-Bus and provides a FBAS signal at its output. There is also the homepage of Georg Acher containing information about this tuner. I have developed a control circuit for this tuner which uses the AT89C2051 from Atmel.....
Microcontroller understands only digital language. However, the inputs available from the environment to the microcontroller are mostly analog in nature, i. e. , they vary continuously with time. In order to understand the inputs by the digital processor, a....
Hi all, I just notice that this 12v switching power supply schematic is hot, some people discuss it in top forum like dp.12v Switching Power Supply....
Hello world!, The more you understand about any subject, the more interesting it becomes. As you read this article you`ll find that the subject of....
Welcome to my small blog, This blog explains a few things about smps circuit diagram, and if you`re interested, then this is worth reading, because....
Welcome folks, today I want post interesting topic about switching power supply circuit diagram for you who want to learn more you can search....
Greeting, This post summarize the work of switching power supply schematic diagram experts who are completely familiar with all the aspects of....
PLC input cards rarely supply power, it means that needs external power supply for the inputs and sensors. Below is an Input card and Ladder Logic diagram that shows how to connect an AC input card. The PLC inputs must convert a variety of logic levels tothe....
Discussion about application of microcontroler PIC16F84 both for Control or Robotics and How to make Programmer of Microcontroller PIC16F84/A. The solar engine is commonly used as an onboard power plant for BEAM-type robots. Sometime called living robots.....
This is a design schematic of a Crystal Colpitts oscillator can be implemented using a transistor and a parallel mode crystal. This is the figure of the circuit. In this circuit, the crystal is use as an inductance. A large value capacitive divider is used....
This is a design circuit for sine wave oscillators that will provide both a sine and square wave output for frequencies from below 20 Hz to above 20 KHz. The frequency of oscillation is easily tuned by varying a single resistor. This circuit is controlled by....
A simple fire alarm circuit based on a LDR and lamp pair for sensing the fire. The alarm works by sensing the smoke produced during fire. The circuit produces an audible alarm when the fire breaks out with smoke. When there is no smoke the light from the....
A 100 Watt inverter circuit using minimum number of components. I think it is quite difficult to make a decent one like this with further less components. Here we use CD 4047 IC from Texas Instruments for generating the 100 Hz pulses and four 2N3055....
This circuit has been designed to provide a clearly visible light, formed by 13 high efficiency flashing LEDs arranged in a pseudo-rotating order. Due to low voltage, low drain battery operation and small size, the device is suitable for mounting on bicycles....
This quad amplifier is actually intended to be used in a car, but it can naturally also be used for a variety of other medium-power applications. The TDA7375A can be successfully used in all situations in which a reasonable amount of audio power is desired....
The integrated output amplifier described in this article consists of little more than one integrated circuit. It is intended especially for use in motor vehicles and other battery-operated applications. Although it appears simple and hardly worth looking....
