Vacuum Tubes Valves
Musical & effects
Yagi Uda Antennas
Metal Detector Circuits
Liquid Sensing Circuits
Light Sensing Circuits
Voltage Detector Circuits
Air-Gas Detection Circuits
Human Sensing Circuits
RF & Radiation
Optical Sensing Circuits
Free Energy Circuits
AC to DC & DC to DC
Solar Cell Circuits
Micro Power Circuits
Switching Power Supplies
Light Laser LED
Digital to Analog
Analog to Digital
Data Bus Circuits
Voltage to Pulse
Current to Voltage
Frequency to Voltage
RF Converter Circuits
Sine to Square Wave
Voltage to Current
voltage to frequency
Period to Voltage
Video Wall circuits
TV Video Circuits
Motor Control Circuits
8051 / 8052
PCB CAD Software
Car bike Circuits
555 Timer Circuits
Remote Control Toy
H Bridge Circuit
Interconnection & Timing
Digital Signal Integrity
Digital & Bipolars
Sensors & Detectors
Regulated Power Supply
4 Band Resistor
5 Band resistor
6 Band resistor
PIC Microcontroller Circuits
PIC Microcontroller Circuits
Servo tester with PIC12F675
This is a simple servo tester which will comprehensively test the capabilities of almost any modern servo. It has two pushbuttons, CENTRE and SWEEP and a potentiometer which works as follows: - CENTRE Does exactly that, centers the servo, afterwards the potentiometer determines position. - SWEEP Sweeps the servo back and forth at a rate...
IR Encoder/Decoder with PIC12C508
The receiver chip uses a Panasonic 4602 38KHz receiver and that's it for external components. It has the serial input (GP3) , two RC hobby servo outputs (GP0/GP1) and three digital outputs (GP2,4,5). Here is the code for the receiver chip. It is a bit of a specialty in that the digital outputs are actually "momentary contact" type outputs...
ASCII Programmer PIC16F84
The idea behind this project is to provide some means of loading a program into a PIC that will then be able to program other PICs in a more conventional way. How do you program a PIC to be a programming device without a programmer, and why would you want to build a programmer if you already have one that can program the PIC to be a programmer....
15 x 7 LED display with PIC16F628
This project is provided as a "prototyping project" as no PC board has been produced. The photographs show the project built on a matrix board using surface-mount components and very fine wire. The final design will require a double-sided board with plate-through holes, especially for the matrix of LEDs, but for the moment you can refer to the...
Robot Beacon with PIC12C508A
We hold the "first rights" to the presentation of this approach and the best part is: "It's FREE!" The PIC12C508A is one of the most amazing devices but because it does not come in a low-cost re-programmable form, it has never been presented in a "designers article." It is a one-time programmable device (OTP) and once it is programmed, it...
Digital lighting controler PIC16F870
This unit recieves DMX 512 data and Analogue (0- 10v) data and uses these to phase angle control mains output. Features: DMX 512 data Input. Analogue (0- 10v )DC Input. 4 Output channels. Remotley programmable Interally saved Presets. 3 Modes of operation Digital Lighting Data, Aanlogue Lighting Data and Internal Presets. 3 Dimming Curves (...
Talking Yoda head
The talking Yoda head consists of a Yoda mask and a microcontroller system to achieve the desired operation/effect. The basic operation of the project was specified as follows: The head was to be placed inside a closed box. Upon opening the box, the light sensor sends a signal to the microcontroller which, in turn, activates the ISD1000A to play...
PWM Fan Controller schematic
The heart of the PWM Fan Controller is a PIC 12F675 microcontroller. This microcontroller is reading the analog output of a LM35 temperature sensor using a ADC (analog to digital converter) . The resulting digital value is converted to a temperature and a fan is powered proportionally to how hot the sensor is. The sensor is mounted against the...
1 button Security locking circuit
The Button Code is a system that allows a single button to act as a keypad. The user enters a 4 digit code into the system using button taps. The button can be placed where the public can access it since like a keypad there are many combinations to keep guessers from activation the system. When the correct code is entered a form-C relay is...
Gear clock using PIC 16f628A
The heart of the clock is a PIC 16f628A microcontroller (PDF). This microcontroller has an internal oscillator however an external 20MHz crystal oscillator is being used since it will have to accurately keep track of time for weeks and months. The microcontroller is interfaced to two buttons and one motor. The interface is very simple, it...
Clock using analogue multimeters ( PIC16F628A )
The Multimeter Clock consists of three multimeters, the first meter displays hours, the second displays minutes and the last displays seconds. A 16F628A PIC microcontroller keeps track of time and outputs a calculated current to each meter to display the current time. The user enters the time by pressing three time adjust buttons. The first...
Fish Tank Lights and Temperature Detector
When the tank is cleaned the fish are removed and placed in a small amount of the tank water. The problem is that fish don’t like rapid temperature fluctuations. I guess a simple in tank or stick on thermometer would have done the trick but what is the fun in that? If the unit just did temperature monitoring it would have been such a waste of...
Digital Volt and Amp Meter
The PIC Microchip Processor must be programmed before it will function as a Volt & Amp meter. There are many internet sites and PIC programmers that you can use. I used a Microchip MPLAB ICD 2 during the project. You might need to made changes to the circuit to accommodate a different type of programmer, do read the programmers instructions...
Power LED mood Lamp
A good way to mount the circuit board is to use a hot glue gun to "mold" the circuit underneath the lamp housing. There is plenty of space there for your board. At the next photos you can see the circuit board mounted on the small 31cm IKEA Mylonit Lamp. It's clear that current changes as colors are changing. As you can see the max current...
NiCd/NiMH Battery Charger
Here we use the PIC16711. Rechargeable battery capacity is rated in mAH (milliampere-hours). The total capacity of a battery is defined as "C", that is it can supply C mA for 1 hour, or 2C for 30 minutes etc. Charge rates can vary from trickle charges to keep the battery 'topped up' of 3.3% of C to 5% of C, a slow current charge of 10% of C to...
PIC Programmer schematic RS232
In the article you will find a description of the universal PIC programmer, which suggested the involvement of Jens Madsen Dyekjar [ http://www.jdm.homepage.dk/newpic.htm ]. Program allows districts PIC12C5XX, 12C67X, 16C55X, 16C61, 16C62X, 16C71, 16C71X, 16C8X, 16F8X, serial EEPROM 24Cxx. It allows to program the microcontroller directly...
Auto-Phone dialer for alarm security system
The circuit consists of a small PIC microcontroller, assembly program, and a few other parts to detect a switch closure from an open door, window, or manual push button and then dial the cell phone number, and transmit a steady tone to indicate the source of the call. The circuit uses the pulse dialing system to interrupt the line connection...
IR 4 channels remote control with PIC12F629
The circuit above illustrates using the IR receiver module along with a PIC12F629 microcontroller to decode 5 individual IR remote control keys so the circuit will only toggle one of the 4 outputs when a particular key is pressed. The 5th key is assigned to the master clear function that toggles off the 4 outputs. Works with most...
Digital Clock Timer schematic
This clock timer uses a PIC16F628 microcontroller to display 3 and 1/2 digit time and control an external load. The clock includes a calendar with leap year and optional daylight savings adjustments. The timer output can be set from 1 to 59 minutes and manually switched on and off. The clock also has a correction feature that allows an...
PIC Dual Temperature Meter by PIC16F628
This is extremely simple to build PIC Temperature meter that allows to measure temperature in two different locations at the same time. Never before such a useful and powerful circuit could be built with so little components and yet provide endless possibilities. This is all possible thanks to the use of PIC16F628 microcontroller and 2G—16 charact
PIC16F688 Based Digital Voltmeter with a PIC mictocontroller
This project describes how to make a digital voltmeter with a PIC microcontroller. A character based on HD44780 LCD display is used to measure voltage. The PIC microcontroller used in this project is PIC16F688, which has 12 I / O pins of which 8 can be used as analog input channels to the built-in 10-bit ADC. The measured voltage is fed to one of
PIC 18 Explorer Board LCD Example Code With SPI Library
Learn to use the LCD display on your pic 18 explorer board with the spi library. The spi library will be used to easily display characters on the LCD. You will also learn how io expanders work.
Production of automatic re-set timer for crime prevention buzzer that uses PIC
The crime prevention bell device that I produced about 20 years ago works still in the active service. It worked many times to make the thief not operate well and not go into it. The bell keeps ringing generally though the bell rings as for the crime prevention buzzer when the thief was about to enter. With this, after the fixed time, it is stoppe
PIC Programming how to get started
Several years ago a colleague suggested that I should be using PICs for my hobby, which then was amateur television. I spent many hours developing and experimenting with video mixers, faders and effects (FX) units, and all this was done sing analogue and digital circuits (TTL gates) that took quite a while to get the desired results. I did not kno
PIC Traffic Lights
All that remains now is for the code to be `, compiled and converted to a HEX file that the PIC can understand. This is achieved easily with the PIC compiler that comes with the PICBASIC package. The PIC is programmed with any of the parallel or serial port programmers that are available free of charge from the NET. If you arrange the LEDs as the
PIC 16F88 Microcontroller PIC based Tengu
Tengu derives its name from a mythicalJapanese creature known for getting intomischief. Our Tengu, however is more earthly in nature. It responds to voice and sounds and takes on different facial features depending on the intensity of the sound. If no sound is heard for some time, it changes from a happy face to a sad face and then goes to sleep. G
PIC 16F88 Digital Thermometer Light Meter and resistance ohm meter
My original idea for this project was simply to try and interface the WINTEK WD-C2401P lcd panel to the pic (see my previous post). I figured it would be fun to add a couple of ADC readings to display something useful on the lcd. PORTB on the PIC is used as the data port for the LCD. The Enable, Register Select and Reset are tied to PORTA. Once th
16 G— 2 LCD Volt Meter & Ampere Meter With PIC Schematic Diagram
Volt meters & ampere meter with PIC can be used to measure voltage and current simultaneously. The series of volt meters & ampere meter with PIC16F876A PIC is used as a data processor voltage and current are measured. This circuit uses the viewer in the form of 16 G— 2 LCD used for the data display voltage and current measurements. In the article
Interface a HD44780 Character LCD with a PIC Microcontroller
An HD44780 Character LCD is a liquid crystal display (LCD) display device designed for interfacing with embedded systems. These screens come in a variety of configurations including 8x1, which is one row of eight characters, 16x2, and 20x4. The most commonly manufactured configuration is 40x4 characters, which requires two individually addressable
Extending the RAM memory of a PIC microcontroller
Dilshan designed a RAM memory extender for PIC microcontrollers. The circuit uses some logic ICs and SRAM memory modules to extend the data memory of a PIC. The designer provided source code for this project written for the MikroC compiler. With this given schematic user may be able to address RAM space up to 192KB. But this can be extended.
Control A Relay from PIC Microcontroller
Simply you can control a relay through Pic Microcontroller. See a simple circuit for controlling a single relay with pic 16f628. When RB5 port of pic become High the relay will operate. This Circuit works with non-latching ralays(commonly used relays are non-latching)
INT of PIC one-chip computer cuts off mentality of designing and programming
Arduino Projects and Circuits
AVR Microcontroller Circuits
Microcontroller Programmer Circuits
68HC11 Microcontroller Circuits
8051 / 8052 Microcontroller Circuits
Geiger–Müller meter circuit project
In this page we will show how you can simply construct such a meter, which is good to have one, to show not only the existence of radioactive materials but also the dangers arising from them. The Geiger–Müller counter can be compared to a photometer. The photometer measures the visible radiation. That is, light, while the gm meter measures the...
255W Valve RF Transmitter circuit
This transmitter of 255W is depended on the coils we put at it to work in both the middle and the short waves. The power in the antenna is 255W and includes 4 states. The first consists of the EF80 that works as a COLLPITS CLAPP oscillator. Frequency selection is done in a somewhat unusual way: Instead of the variable capacitor, it uses a...
Arduino DAC Signal Generator project
Once the circuit gets current, all variables are initialized and the loop function is continually running. Initially all LEDs are off and there is no signal at the output. By pressing the signal switch, the first light that shows the most signal is at the output and the D0-D7 terminals give the appropriate signal which, when passing from the...
Recording circuit of phone conversations using PC
This circuit is used to record telephone conversations on your landline telephone. All you will need is this small circuit and subscription of your PC. There are few times when we forget what we said or told us. So we need recording. Sometime, not many years ago, recording of this kind of conversation was done with a small tape recorder. The...
FM Micro-Transmitter Bug Surveillance Circuit
The transmitter we recommend to build is quite simple. It can even be built by a beginner. However, unlike the ease of construction and its small size, it is almost certain that it will impress you with its outstanding performance. Its autonomy is 12-15 hours, with a 9 volt battery and its range is from 100 to 300 meters depending on the...
Construction of 50Watt 8Ω two-way Hi-Fi Speakers
The presented speakers are distinguished for their small dimensions and their extraordinary sound. Our home space is often limited and prohibitive for large speakers. This limitation does not mean that we will stay without high Sound Quality. Its design is simple, low cost and is easy to construct. Speaker types are too many and are designed in...
GSM modem circuit with Wavecom WMOi3
Modems are devices that connect either remote devices to a computer, or two or more computers to each other. Their connection is usually wired. The GSM modem we present is wireless. It can connect two computers, a computer with the internet or even be the central unit for a data acquisition system. Generally the construction is a GSM phone...
1W UHF Linear Amplifier with BLW33
This circuit is an amplifier for small transmitters operating in the UHF band, specifically in the 450-800MHz range. The amplifier works in class A and we used the well-known Philips BLW33 transistor for its manufacture. The construction, although simple, can be said to be quite critical due to the high frequency singularity. To achieve this, a...
8W Amplifier with TDA2003 circuit
Many times a small amplifier is needed to meet the needs of small spaces. This amplifier can be either mono or stereo, with this circuitry you can comfortably drive two small speakers. To build the amplifier you do not need anything but a few materials and a small power supply. The power of the amplifier, although low power, will solve many...
Digital Signal Integrity
Interconnection and Timing of Digital Circuits
CMOS Circuits Tutorial
Microchip Extends Custom Programming Service to Include AVR® and SAM Microcontrollers
Aug 21, 2017
Microchip's MPLAB gets new in-circuit debugger ICD 4
Aug 14, 2017
PIC MCU development tool gets faster, smarter
Aug 17, 2017
Microchip – Extended custom programming service available for more than 30 AVR and SAM MCU families
Aug 22, 2017
Microchip's fourth-generation in-circuit debugger
Aug 15, 2017
Microchip – Next-generation in-circuit debugger offers unparalleled speed and flexibility
Aug 15, 2017
In-Circuit Debugger (ICD) with unparalleled speed and flexibility
Aug 18, 2017
Sign of the times: "Free microchip implants in lobby today!"
Aug 1, 2017