New Circuits Page 20
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The fan runs constantly in many PCs, which may not even be necessary. A simple controller circuit can regulate the fan speed according to demand. This not....
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-
Ring current generator The ring current generator can produce a ringing current voltage of 75-90V and 25Hz±5HZ. It is available to be used for vibrating ring in communication devices, for example, carrier, ultrahigh frequency, wire telephone. It can also be....
-
You can use this water level alarm circuit anywhere as a water level indicator to detect the desired level of water for example in tanks, swimming pools or at any place where you store water. The circuit is build around a 555 timer IC which is a famous and....
-
This is the most simple and affordable solar battery charger that the hobbyist can make. It has a few drawbacks over other similar controls, but offers numerous advantages. It is intended for charging lead-acid batteries, but may also be used for charging....
-
This Keypad is suitable for the Modular Burglar Alarm. However, it has other applications. Pressing a single key will energize the relay. Entering the Four-Digit code of your choice will de-energize it....
-
This V/I display module is eminently suitable for building into an existing DC power supply, where it gives a precise indication of the set voltage or the current consumption of the load. In the voltage range, the decimal point lights on LD3, and the....
-
-
This Timer can give a time delay from 10 minutes to 12 hours. The time delay can be selected using a Rotary switch and when the timing cycle completes, relay energizes and remains latched till the circuit resets. This circuit finds various applications like....
-
This interface schematic shows the JTAG, Serial Wire, and ETM interface circuits of ULINKpro. Use this schematic to analyze potential problems with the target hardware. ARM websites use two types of cookie: (1) those that enable the site to function and....
-
From all the existing tubes, for sure the most interesting ones are the indicator tubes. From the 1930 ²s when they were invented, they captivated the eyes with the greenish shimmering light, thus the Magic Eye term appeared. The magic eye tubes are just....
-
The photo above clearly illustrates phase angle control: output voltage controlled by the gate drive signal applied to a thyristor. What is phase angle control That is what I`m going to talk about in this article. Phase angle control is a method of PWM....
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His oscillator sought to use resistors and capacitors instead of bulky low frequency LC tank circuits to generate audio frequencies. He obtained low distortion (<0. 5%) with the use of a two stage amplifier with enough negative feedback to set it`s gain to....
-
-
The hardware configuration when using multiple 1-Wire temperature sensors like the DS1820 is very simple, as illustrated in the block diagram below. A single-wire bus is used for communication between the microcontroller and the temperature sensor. It is....
-
This is a simple ceiling fan regulator circuit diagram. It is used to control the speed of a ceiling fan. In the other words it is an AC motor speed controller circuit, as because it`s control the speed of a AC motor(Ceiling Fan). This ceiling fan regulator....
-
-
A very simple high efficiency switching power supply electronic circuit project can be designed using the LMZ13608 8A regulator. This 8A switching power supply regulator electronic project based on the LMZ13608 has an very high efficiency and require few....
-
-
-
Mother Bug is a simple, interactive electronic message board. disguised as a "bug. " Text messages are pre-programmed into the memory of the device`s microcontroller. When triggered, the microcontroller uses a 5 x 7 LED matrix display to print out the....
-
The 555 timer produces a rapid series of pulses whenever switch SI is open. These pulses are counted in groups of 16 and converted into binary form by the 7493 and applied to the 74154 (a l-of-16 decoder/demultiplexer) wired so that each of its 16 output....
-
To generate a system clock or auxiliary sleep clock in microcontrollers (µCs) and low-power instruments we usually use A 32kHz oscillator. A CMOS inverter....
-
This circuit employs the popular and easy to find LM3914 IC. This kind of IC is quite very simple to drive, requires no voltage regulators (it features a built in voltage regulator) and can be powered from almost every resource. Once the test switch is....
-
Generate sinusoidal pulse width modulation (SPWM) signals using the ECCP module in a PIC for generating a sine wave output for use in DC-AC inverter. I have had requests from people asking how to generate the same SPWM signals with other microcontrollers....
-
We chose to build a nightlight combined with a wake-up alarm. Our nightlight features not one, not two, not three, not four, not five, but SIX ” yes, SIX! ” LEDs that turn on when a photosensor detects a decreased amount of ambient light. Not only that, but....
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This would require a 1200 rpm synchronous motor and a light source, which would be made of a row of LEDs, arranged vertically, and located about 6 inches from the screw. My plan was enclose it in a clear plastic cabinet so all the components would be....
-
-
All modern IR remote control devices produce a continuous coded stream of pulses at 37. 9 kHz when any button on the module is pressed. These IR pulses are detected and decoded by a receiver (your TV, VCR etc. ) and the appropriate function activated. In our....
-
Drive an ultrasonic transducer by using this driver circuit. I have a quesiton for this operation. How can I limit my output current I am using a 60W transducer and maybe it can be damaged because of the output current. Could you direct me, or share sample....
-
The advantages for a guitar amplifier are the very simple circuitry, even for comparatively high power outputs, and a certain built-in degree of loudspeaker protection, due to capacitor C8, preventing the voltage supply to be conveyed into loudspeakers in....
-
-
Amplifier device that accepts a varying input signal and produces an output signal that varies in the same way as the input but has larger amplitude. The input signal may be a current, a voltage, a mechanical motion, or any other signal; the output signal is....
-
Originally, the tank cost around Php400 but then it was sold at around a hundred less. Without thinking twice I know I had a great offer so I decided to buy the toy. Opening the toy was quite a bit tricky. The track belt needs to be removed first and the....
-
If you have evered to use Flasher Relay 12V systematic usual mechanical , for general automobile. Today we try to come to build Circuit Flasher Relay 12V , use...
-
-
Microcontroller BoardsPS-LPC2138 ADK, ARM Development Kit is proposed to smooth the progress of developing and debugging of various designs encompassing of High speed 32-bit MCU from NXP. The board supports NXP`s LPC214x family devices with various memory....
-
-
This project uses just one tube. However, the tube chosen (13EM7) actually contains two separate triode structures. One is physically quite small, and is capable of a large signal gain but little power. It therefore makes an ideal preamplifier stage. The....
-
-
I built these small diaphragm condenser mics as a project for an Electronics III class. The circuit layout and design of the microphones are based on DIY microphone projects by Scott Helmke (the ""Alice"" mic) and Stefan Avalos` small cardioids. The circuit....
-
-
The wireless transmitter ambit congenital about transistor T1 (BF494) is a basal low-power variable-frequency VHF oscillator. A varicap diode ambit is included to change the abundance of the fm transmitter and to accommodate abundance accentuation by audio....
-
It is a programable frequency multiplier, usually using digital logic integrated circuits. The synthesizer is aranged to multiply a reference frequency by a programable amount to achieve just about any frequency you want. If, for example you had a reference....
-
So far the idea has been to show you how the Arduino Uno board and its Atmel ATMEGA328P microcontroller can interact fairly simply with the outside world. This time we`re simplifying the electronics but ratcheting up the demands on the microcontroller by....
-
-
The compact, low-cost condenser mic audio amplifier described here provides good-quality audio of 0.5 watts at 4.5 volts. It can be used as part of interc....
-
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....
-
Step-by-step instruction to build a AVR based versatile camera trigger with functions like: lightning trigger, sound trigger, interval trigger, slave flash trigger, bulb mode ....
-
The problem is when i connect the 8051 to the encoder the data send is not received at the receiver but as soon as the 8051 connections are removed the transmisison works perfectly. thus manually the RF communication works perfectly i. e the 8 bit data which....
-
My coolant level alarm has been working for the last 6 years, the alarm started to go off fairly regularly, although every time I checked the expansion tank, there was no problem with the level of coolant. Even with a cold engine, and using a screwdriver to....
-
i`ve been wrapped up in Jeep repair lately as there`s some sort of issue prevent the beloved XJ from firing up. i have, however, in the meantime had some time to work through my initial modulation tests on this version of the PT2399 circuit and nail down a....
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A dimming control circuit generates a dimming control signal for determining brightness of at least one light-emitting diode. The dimming control signal has a plurality of bright-dark cycles, each of which consists of a bright phase and a dark phase. The....
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The LM1036 is a DC controlled tone (bass/treble), volume and balance circuit which can be applied in car radio, TV and audio systems. Loudness compensation to....
-
Nowadays, USBis the most popular connection connection between PC and peripherals such as AVR programmers, printers, scanners etc. For that reason I had to modify my old serial AVR In-System-Programmer (ISP) to work with USB connection. You can say, "use a....
-
Uses National have sound. MM57100 TV game chip to provide logic for generatingbackgrounds, paddles, ball, and dig ital scoring Circuit generates all necessary timing (sync, blanking, and burst) to interface with interface directly to antenna terminals of....
-
-
It must be emphasized that the Bedini Trifilar SG or SSG are not over ‘unity (OU) systems. They are only one-to-one energy shuttle systems. They use one charged input battery to charge 4 or more output batteries. When set up properly, one pays for 1 and one....
-
Mullard EL34 push-pull vacuum tube amplifier scheamtic using Dynaco A420 audio output transformers..
-
The new design of a tutorial board based on the popular PIC16F84A microcontroller. Have a features eight single leds, an LCD display and five push ...
-
-
An analog VU meter is often included in the audio equipment to display signal levels in volume units. Analog VU meters with peak LED Another Thumbnail magnetoelectric VU meter response of a VU meter (black line) compared with the instantaneous input level....
-
I don`t know if this is a good design or not.Circle Op-amp are 2nd order low/high pass filter. Low pass filter range is 20-250Hz High pass filter....
-
This web page is provided to offer assistance and information to anyone that is wanting to construct a Tesla coil. I encourage you to make use of the other resources we offer on this page. I live in the United States, and in this country the electrical line....
-
-
Is infrared emission circuit diagram. NE555 circuit generates a 40kHz pulse which is sent by the infrared emission control SE303 after beingamplified by VT. (b) is remote receiver and infrared dimming circuit composed of the KA2184. LS7232 is an integrated....
-
Making an lcd digital watch alarm and thermometer. C source code downloaded converted that C file to Hex using KEIL and now I want to program it in chip. I have Universal programmer BEE PROG +. When I select chip and load. hex file in software, I write data....
-
This chapter contains circuit diagrams for several power supplies for pulsed solid state lasers. These include units suitable for driving the popular Hughes ruby and YAG rangefinder laser assemblies as well, one using the flash from a disposable pocket....
-
-
-
The data logger consists of a simple op-amp amplifier circuit that amplifies the signal and sends it to be digitized by a PIC16F688 microcontroller, serialized, and sent to the computer`s serial port via a MAX232 serial driver: I guess you are already....
-
-
This is a Portable light-level meter circuit with five-decade dynamic range. This uses a single cell battery as the power supply. To calibrate this circuit,....
-
This is a Logic probe circuit is one, That is suitable for checking the voltage levels in the TTL circuit. It receives from the circuit being tested. Shows how high or low logic level one. The circuit when the input voltage to the probe Tip is higher than 2.....
-
16G—2 character lcd display is very basic module which is commonly used in electronics devices and projects. It can display 2 lines of 16 characters. Each character is displayed using 5G—7 or 5G—10 pixel matrix. Interfacing 16G—2 LCD with 8051 using Keil C....
-
-
A microcontroller (MCU) is a small computer in a single integrated circuit consisting of a CPU is relatively simple combined with support functions such as crystal oscillators, timers, sensors, serial and analog I / O etc. Microcontroller designed for small....
-
Voltage regulator IC`s, with 3 pins, from LM7805 and LM7812 series are excellent for usage in voltage regulator circuits. If you need higher currents, up t....
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-
-
-
So you could easily set it for 20 or even 200 Volts Full Scale, Using a Suitable Potentiometer on the Input. DO NOT EXCEED 30 VOLTS to PIN 5 of the LM3914`s. The 20 K resistor Shown across the LED is required to null out the #10 LED, when higer LED`s are lit....
-
This is a modification of the circuit Simple Lamp Dimmer/Fan Regulator previously posted here. The working of the circuit is same as that of the previous, but in addition a snubber circuit consisting of resistor R4 and capacitor C3 is included to improve the....
-
Turn ON or OFF electrical devices using remote control is not a new idea and you can find so many different devices doing that very well. For realization....
-
Generating sine waves with controlled frequencies over a wide range is difficult when using RC or LC sinusoidal oscillators. However, this performance can be simply created using a wideband digital squarewave oscillator, a counter, and a weighted summing....
-
This article presents a description of a 70cm wideband transceiver for duplex operation. The modules are designed for operation in a 200 kHz wide duplex channel, freely selectable from 430-440 MHz with a 100 kHz channel spacing. First prototypes were....
-
In this interface session we are interface mcp3202 adc interface with 8051 microcontroller. Mcp3202 is a 12bit spi protocol adc, is interface with P89v51rd2 microcontroller,this microcontroller have spi protocol so no need to worry about SDI,SDO,CLCK.....
-
-
The circuit diagram and code on how to connect an 16x2 LCD to a PICAXE-18M2 microcontroller....
-
-
This is one of the simplest stereo balance indicator circuit that you can have. The circuit will give a visual indication (using two LEDs) proportional to the difference in balance between the left and right channels of a stereo system. The circuit is based....
-
This last article on bipolar junction transistors (BJT) is a potpourri of circuits. Some are practical and some are not so practical, but they can be great for experiments. With these circuits you can amplify signals, filter high and low frequencies,....
-
A suitable method to sense when some LEDs in my Garage Door Opener are on. A power source (perhaps the same as Vout below) runs to a 1. 5Kohm resistor which runs to 6 LEDs then a transistor of some sort. The transistor is attached to ground and pin 7 on a....
-
Universal Timer is a most versatile timer project wide range of 1/10th second to 100s hour time period circuit diagram with description of universal timer various timer circuit ...
-
This kit is a daughter board, designed by Jan G0BBL and Tony KB9YIG, that provides four electronically switched band-pass filters for the Softrock Lite + Xtall V9. 0 RX, replacing the single-band daughter board in the original design. The electronically....
-
A small circuit that can find a lot applications of measurement time. She has the possibility us inform with sound signal from the BZ1. At the same time, exist the possibility drive a external circuit via the optocoupler IC2, after we connect the applicable....
-
Ethernet has traditionally been a quite complex interface. All Ethernet chips until today had 100 pins or more, where difficult to find in small quantities and difficult to use from a small microcontroller with little memory. Microchip has changed the world....
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This accomplishing is acclimatized to rebroadcast the achievement of a CD player, television receiver, or radio receiver. I use it so that I can move about the abode and accept to my admired programs after advancing others. Within and the house, I....
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In the general sense a mixer is basically any circuit that combines two or more circuits or signals into a common output. A more commonly used definition defines a mixer as a nonlinear circuit as one that accepts as its input two different frequencies [F1 &....
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This is a basic 555 squarewave oscillator used to produce a 1 Khz tone from an 8 ohm speaker. In the circuit on the left, the speaker is isolated from the oscillator by the NPN medium power transistor which also provides more current than can be obtained....
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The afterward diagram is 16W Bridge audio amplifier circuit. The ambit congenital based 2 pieces of ability IC LM383 in arch connection, so this amplifier is an arch amplifier. This is an old amplifier, LM383 is discontinued, so this LM383 ability be....
The fan runs constantly in many PCs, which may not even be necessary. A simple controller circuit can regulate the fan speed according to demand. This not....
Ring current generator The ring current generator can produce a ringing current voltage of 75-90V and 25Hz±5HZ. It is available to be used for vibrating ring in communication devices, for example, carrier, ultrahigh frequency, wire telephone. It can also be....
You can use this water level alarm circuit anywhere as a water level indicator to detect the desired level of water for example in tanks, swimming pools or at any place where you store water. The circuit is build around a 555 timer IC which is a famous and....
This is the most simple and affordable solar battery charger that the hobbyist can make. It has a few drawbacks over other similar controls, but offers numerous advantages. It is intended for charging lead-acid batteries, but may also be used for charging....
This Keypad is suitable for the Modular Burglar Alarm. However, it has other applications. Pressing a single key will energize the relay. Entering the Four-Digit code of your choice will de-energize it....
This V/I display module is eminently suitable for building into an existing DC power supply, where it gives a precise indication of the set voltage or the current consumption of the load. In the voltage range, the decimal point lights on LD3, and the....
This Timer can give a time delay from 10 minutes to 12 hours. The time delay can be selected using a Rotary switch and when the timing cycle completes, relay energizes and remains latched till the circuit resets. This circuit finds various applications like....
This interface schematic shows the JTAG, Serial Wire, and ETM interface circuits of ULINKpro. Use this schematic to analyze potential problems with the target hardware. ARM websites use two types of cookie: (1) those that enable the site to function and....
From all the existing tubes, for sure the most interesting ones are the indicator tubes. From the 1930 ²s when they were invented, they captivated the eyes with the greenish shimmering light, thus the Magic Eye term appeared. The magic eye tubes are just....
The photo above clearly illustrates phase angle control: output voltage controlled by the gate drive signal applied to a thyristor. What is phase angle control That is what I`m going to talk about in this article. Phase angle control is a method of PWM....
His oscillator sought to use resistors and capacitors instead of bulky low frequency LC tank circuits to generate audio frequencies. He obtained low distortion (<0. 5%) with the use of a two stage amplifier with enough negative feedback to set it`s gain to....
The hardware configuration when using multiple 1-Wire temperature sensors like the DS1820 is very simple, as illustrated in the block diagram below. A single-wire bus is used for communication between the microcontroller and the temperature sensor. It is....
This is a simple ceiling fan regulator circuit diagram. It is used to control the speed of a ceiling fan. In the other words it is an AC motor speed controller circuit, as because it`s control the speed of a AC motor(Ceiling Fan). This ceiling fan regulator....
A very simple high efficiency switching power supply electronic circuit project can be designed using the LMZ13608 8A regulator. This 8A switching power supply regulator electronic project based on the LMZ13608 has an very high efficiency and require few....
Mother Bug is a simple, interactive electronic message board. disguised as a "bug. " Text messages are pre-programmed into the memory of the device`s microcontroller. When triggered, the microcontroller uses a 5 x 7 LED matrix display to print out the....
The 555 timer produces a rapid series of pulses whenever switch SI is open. These pulses are counted in groups of 16 and converted into binary form by the 7493 and applied to the 74154 (a l-of-16 decoder/demultiplexer) wired so that each of its 16 output....
To generate a system clock or auxiliary sleep clock in microcontrollers (µCs) and low-power instruments we usually use A 32kHz oscillator. A CMOS inverter....
This circuit employs the popular and easy to find LM3914 IC. This kind of IC is quite very simple to drive, requires no voltage regulators (it features a built in voltage regulator) and can be powered from almost every resource. Once the test switch is....
Generate sinusoidal pulse width modulation (SPWM) signals using the ECCP module in a PIC for generating a sine wave output for use in DC-AC inverter. I have had requests from people asking how to generate the same SPWM signals with other microcontrollers....
We chose to build a nightlight combined with a wake-up alarm. Our nightlight features not one, not two, not three, not four, not five, but SIX ” yes, SIX! ” LEDs that turn on when a photosensor detects a decreased amount of ambient light. Not only that, but....
This would require a 1200 rpm synchronous motor and a light source, which would be made of a row of LEDs, arranged vertically, and located about 6 inches from the screw. My plan was enclose it in a clear plastic cabinet so all the components would be....
All modern IR remote control devices produce a continuous coded stream of pulses at 37. 9 kHz when any button on the module is pressed. These IR pulses are detected and decoded by a receiver (your TV, VCR etc. ) and the appropriate function activated. In our....
Drive an ultrasonic transducer by using this driver circuit. I have a quesiton for this operation. How can I limit my output current I am using a 60W transducer and maybe it can be damaged because of the output current. Could you direct me, or share sample....
The advantages for a guitar amplifier are the very simple circuitry, even for comparatively high power outputs, and a certain built-in degree of loudspeaker protection, due to capacitor C8, preventing the voltage supply to be conveyed into loudspeakers in....
Amplifier device that accepts a varying input signal and produces an output signal that varies in the same way as the input but has larger amplitude. The input signal may be a current, a voltage, a mechanical motion, or any other signal; the output signal is....
Originally, the tank cost around Php400 but then it was sold at around a hundred less. Without thinking twice I know I had a great offer so I decided to buy the toy. Opening the toy was quite a bit tricky. The track belt needs to be removed first and the....
If you have evered to use Flasher Relay 12V systematic usual mechanical , for general automobile. Today we try to come to build Circuit Flasher Relay 12V , use...
Microcontroller BoardsPS-LPC2138 ADK, ARM Development Kit is proposed to smooth the progress of developing and debugging of various designs encompassing of High speed 32-bit MCU from NXP. The board supports NXP`s LPC214x family devices with various memory....
This project uses just one tube. However, the tube chosen (13EM7) actually contains two separate triode structures. One is physically quite small, and is capable of a large signal gain but little power. It therefore makes an ideal preamplifier stage. The....
I built these small diaphragm condenser mics as a project for an Electronics III class. The circuit layout and design of the microphones are based on DIY microphone projects by Scott Helmke (the ""Alice"" mic) and Stefan Avalos` small cardioids. The circuit....
The wireless transmitter ambit congenital about transistor T1 (BF494) is a basal low-power variable-frequency VHF oscillator. A varicap diode ambit is included to change the abundance of the fm transmitter and to accommodate abundance accentuation by audio....
It is a programable frequency multiplier, usually using digital logic integrated circuits. The synthesizer is aranged to multiply a reference frequency by a programable amount to achieve just about any frequency you want. If, for example you had a reference....
So far the idea has been to show you how the Arduino Uno board and its Atmel ATMEGA328P microcontroller can interact fairly simply with the outside world. This time we`re simplifying the electronics but ratcheting up the demands on the microcontroller by....
The compact, low-cost condenser mic audio amplifier described here provides good-quality audio of 0.5 watts at 4.5 volts. It can be used as part of interc....
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....
Step-by-step instruction to build a AVR based versatile camera trigger with functions like: lightning trigger, sound trigger, interval trigger, slave flash trigger, bulb mode ....
The problem is when i connect the 8051 to the encoder the data send is not received at the receiver but as soon as the 8051 connections are removed the transmisison works perfectly. thus manually the RF communication works perfectly i. e the 8 bit data which....
My coolant level alarm has been working for the last 6 years, the alarm started to go off fairly regularly, although every time I checked the expansion tank, there was no problem with the level of coolant. Even with a cold engine, and using a screwdriver to....
i`ve been wrapped up in Jeep repair lately as there`s some sort of issue prevent the beloved XJ from firing up. i have, however, in the meantime had some time to work through my initial modulation tests on this version of the PT2399 circuit and nail down a....
The LM1036 is a DC controlled tone (bass/treble), volume and balance circuit which can be applied in car radio, TV and audio systems. Loudness compensation to....
Nowadays, USBis the most popular connection connection between PC and peripherals such as AVR programmers, printers, scanners etc. For that reason I had to modify my old serial AVR In-System-Programmer (ISP) to work with USB connection. You can say, "use a....
Uses National have sound. MM57100 TV game chip to provide logic for generatingbackgrounds, paddles, ball, and dig ital scoring Circuit generates all necessary timing (sync, blanking, and burst) to interface with interface directly to antenna terminals of....
It must be emphasized that the Bedini Trifilar SG or SSG are not over ‘unity (OU) systems. They are only one-to-one energy shuttle systems. They use one charged input battery to charge 4 or more output batteries. When set up properly, one pays for 1 and one....
Mullard EL34 push-pull vacuum tube amplifier scheamtic using Dynaco A420 audio output transformers..
The new design of a tutorial board based on the popular PIC16F84A microcontroller. Have a features eight single leds, an LCD display and five push ...
An analog VU meter is often included in the audio equipment to display signal levels in volume units. Analog VU meters with peak LED Another Thumbnail magnetoelectric VU meter response of a VU meter (black line) compared with the instantaneous input level....
I don`t know if this is a good design or not.Circle Op-amp are 2nd order low/high pass filter. Low pass filter range is 20-250Hz High pass filter....
This web page is provided to offer assistance and information to anyone that is wanting to construct a Tesla coil. I encourage you to make use of the other resources we offer on this page. I live in the United States, and in this country the electrical line....
Is infrared emission circuit diagram. NE555 circuit generates a 40kHz pulse which is sent by the infrared emission control SE303 after beingamplified by VT. (b) is remote receiver and infrared dimming circuit composed of the KA2184. LS7232 is an integrated....
Making an lcd digital watch alarm and thermometer. C source code downloaded converted that C file to Hex using KEIL and now I want to program it in chip. I have Universal programmer BEE PROG +. When I select chip and load. hex file in software, I write data....
This chapter contains circuit diagrams for several power supplies for pulsed solid state lasers. These include units suitable for driving the popular Hughes ruby and YAG rangefinder laser assemblies as well, one using the flash from a disposable pocket....
The data logger consists of a simple op-amp amplifier circuit that amplifies the signal and sends it to be digitized by a PIC16F688 microcontroller, serialized, and sent to the computer`s serial port via a MAX232 serial driver: I guess you are already....
This is a Portable light-level meter circuit with five-decade dynamic range. This uses a single cell battery as the power supply. To calibrate this circuit,....
This is a Logic probe circuit is one, That is suitable for checking the voltage levels in the TTL circuit. It receives from the circuit being tested. Shows how high or low logic level one. The circuit when the input voltage to the probe Tip is higher than 2.....
16G—2 character lcd display is very basic module which is commonly used in electronics devices and projects. It can display 2 lines of 16 characters. Each character is displayed using 5G—7 or 5G—10 pixel matrix. Interfacing 16G—2 LCD with 8051 using Keil C....
A microcontroller (MCU) is a small computer in a single integrated circuit consisting of a CPU is relatively simple combined with support functions such as crystal oscillators, timers, sensors, serial and analog I / O etc. Microcontroller designed for small....
Voltage regulator IC`s, with 3 pins, from LM7805 and LM7812 series are excellent for usage in voltage regulator circuits. If you need higher currents, up t....
So you could easily set it for 20 or even 200 Volts Full Scale, Using a Suitable Potentiometer on the Input. DO NOT EXCEED 30 VOLTS to PIN 5 of the LM3914`s. The 20 K resistor Shown across the LED is required to null out the #10 LED, when higer LED`s are lit....
This is a modification of the circuit Simple Lamp Dimmer/Fan Regulator previously posted here. The working of the circuit is same as that of the previous, but in addition a snubber circuit consisting of resistor R4 and capacitor C3 is included to improve the....
Turn ON or OFF electrical devices using remote control is not a new idea and you can find so many different devices doing that very well. For realization....
Generating sine waves with controlled frequencies over a wide range is difficult when using RC or LC sinusoidal oscillators. However, this performance can be simply created using a wideband digital squarewave oscillator, a counter, and a weighted summing....
This article presents a description of a 70cm wideband transceiver for duplex operation. The modules are designed for operation in a 200 kHz wide duplex channel, freely selectable from 430-440 MHz with a 100 kHz channel spacing. First prototypes were....
In this interface session we are interface mcp3202 adc interface with 8051 microcontroller. Mcp3202 is a 12bit spi protocol adc, is interface with P89v51rd2 microcontroller,this microcontroller have spi protocol so no need to worry about SDI,SDO,CLCK.....
The circuit diagram and code on how to connect an 16x2 LCD to a PICAXE-18M2 microcontroller....
This is one of the simplest stereo balance indicator circuit that you can have. The circuit will give a visual indication (using two LEDs) proportional to the difference in balance between the left and right channels of a stereo system. The circuit is based....
This last article on bipolar junction transistors (BJT) is a potpourri of circuits. Some are practical and some are not so practical, but they can be great for experiments. With these circuits you can amplify signals, filter high and low frequencies,....
A suitable method to sense when some LEDs in my Garage Door Opener are on. A power source (perhaps the same as Vout below) runs to a 1. 5Kohm resistor which runs to 6 LEDs then a transistor of some sort. The transistor is attached to ground and pin 7 on a....
Universal Timer is a most versatile timer project wide range of 1/10th second to 100s hour time period circuit diagram with description of universal timer various timer circuit ...
This kit is a daughter board, designed by Jan G0BBL and Tony KB9YIG, that provides four electronically switched band-pass filters for the Softrock Lite + Xtall V9. 0 RX, replacing the single-band daughter board in the original design. The electronically....
A small circuit that can find a lot applications of measurement time. She has the possibility us inform with sound signal from the BZ1. At the same time, exist the possibility drive a external circuit via the optocoupler IC2, after we connect the applicable....
Ethernet has traditionally been a quite complex interface. All Ethernet chips until today had 100 pins or more, where difficult to find in small quantities and difficult to use from a small microcontroller with little memory. Microchip has changed the world....
This accomplishing is acclimatized to rebroadcast the achievement of a CD player, television receiver, or radio receiver. I use it so that I can move about the abode and accept to my admired programs after advancing others. Within and the house, I....
In the general sense a mixer is basically any circuit that combines two or more circuits or signals into a common output. A more commonly used definition defines a mixer as a nonlinear circuit as one that accepts as its input two different frequencies [F1 &....
This is a basic 555 squarewave oscillator used to produce a 1 Khz tone from an 8 ohm speaker. In the circuit on the left, the speaker is isolated from the oscillator by the NPN medium power transistor which also provides more current than can be obtained....
The afterward diagram is 16W Bridge audio amplifier circuit. The ambit congenital based 2 pieces of ability IC LM383 in arch connection, so this amplifier is an arch amplifier. This is an old amplifier, LM383 is discontinued, so this LM383 ability be....
