The hardware schematic for the wooden menace (robotic arm) is fairly straight forward. The PIC microcontroller has one control line feeding to each servo and it also connects to the RJ45 connecter. The RJ45 connector is used for getting input from the....

A larger version of the circuit diagram by clicking here. The circuit was drawn using Eagle from CadSoft, a schematic and PCB layout package that is free to use for small non-commercial projects. The heart of the keyer is the PIC16F877A chip. This is a 20MHz....

It would be convenient to use momentary contact push button switch to turn ON and turn OFF your Raspberry Pi (RPi). A press of button should apply power to micro USB header, and keep it ON while Raspberry Pi initializes and starts its application....

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A popular project among microcontroller aficionados is to build a radio-controlled clock. Tiny receiver boards are available, with a pre-adjusted ferrite antenna, that receive and demodulate the DCF77 time signal broadcast from Mainf lingen in Germany. DCF77....

Use the Maxim MAX292 switched-capacitor filter IC to round a square wave into a sine wave; the circuit`s frequency range is between 5.2282 Hz and 8928.6 Hz when the microcontroller is operating at a 16-MHz clock frequency..

Are you a beginner in micro controller projects and are you stuck where to start from if yes, then this is one of the simplest mini projects that you can start from. This mini project will give you a clear understanding of programming your micro controller.....

For a project I need to display a progress bar of the activity performed by my MCU. For this purpose I am going to use a bargraph display, but the problem is that bargraph display driver driver IC LM3914 uses analog input where as MCU produces a digital....

This is a simple application of internal 10-bit ADC(analogto digital converter) of PIC16F676 microcontroller. you can use this circuit to measure up to 30 v dc. the possible applications are on bench top power supply or as a panel meter invarioussystem.....

A simple RS232 example project that takes all the power it needs from the serial port. Use it to power your microcontroller and communicate between serial port and microcontroller. Takes advantage of the fact that pc serial ports will accept 0-5V rather than....

Most of my circuits still use 5 V regulated power for the chips, because 8-bit microcontrollers run faster and some sensors require 5 V. Since 5 V is more than enough for even a white LED, I`m not concerned with the voltage needed by a particular LED in use.....

Drive a small (3. 6V, <1A) brushed motor bidirectionally with a PIC MCU. My available space is extremely limited, so I`d like to use a single 3. 6V power supply for both the motor and PIC, and a minimum of drive circuitry. I haven`t found a dedicated motor....

Heart rate monitor using 8051 microcontroller. Measures the heart rate from the finger tip using IR diode photo transistor pair (Photoplethysmography). AT89S51 is the microcontroller used here....

Did you check if you actually see the zero crossings on your input pin You might want to write a sketch that toggles the pin13 LED every 50 or 60 or zerocrossings. You should see a visible 1Hz blink. jippie Mar 3 `13 at 11:41 Which input pin did you use for....

This is a project that I started back late 2003 when I just starting to learn PIC programming. I wanted to building something that actually did somthing us....

The eyes of the switch control system allow the microcontroller`s "brain" to know where the trains are located on the layout. This insures that only one train is on the main line at a time and that the switches are set so that the train returns to the proper....

This motor overload circuit does not simply disallow overloading since it is permissible to overdrive a system but only if it is done for a short time (typically dependent on heat buildup). An overload detection circuit protects a motor against currents....

This is a variable power supply controlled with PIC microcontroller. There is LCD display in this circuit which will show the actual value of power supply output. This power supply use push on switch to adjust the output voltage and current value. The top....

The schematic show that the AccelR8 only uses 3 IC`s. An AVR 8515 microcontroller do the calculation work and controls the other circuits. An MAX603 controls voltage and power-on/power-off. And the chip that makes it all possible, the ADXL202 from Analog....

The microcontroller within A / D converter can use PIC MCU within A / D converter produced by the Microchip. MMA1220D`s state end and self-test end are connected to the P1, P0 ports of ?C, its output voltage is sent to the A / D converter input end. C1, C2....

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Arduino Uno has a ATMEGA328P-PU microcontroller, and bunch of other stuff on the board. I`d like to program the chip without the Arduino software, and only the minimum of other components. I want to eventually create things without the cost of Arduino, and I....

Since I finished my degree in April, I have been looking for work. The search has been slow but hopefully soon I will be making the big bucks. To fill my s....

The circuit is bell timer. This new project uses AT89S52 microcontroller and I2C EEPROM to store the alarm timings. Also the 7segment display is replaced with LCD display. DS1307 is used for Real time clock. The user can store upto 25 bell timings and they....

This light sensor circuit that is photos sensor is the gap between light and electronics. This circuit is built by op amp and microcontroller PIC16C63 for control the sensor. This circuit is not precision application, but they can be effectively used in....

This wireless transmitter and receiver pair operate at 315Mhz. They can easily fit into a breadboard and work well with microcontrollers to create a very simple wireless data link. Since these are only transmitters, they will only work communicating data....

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This project illustrates how to use an ATTiny microcontroller and an RGB LED to create a coloured light that cyles continuously through random colours, but changes colour dramatically at the press of a switch. Why My kids had this $2 novelty pen that did....

Chris from PyroElectro.com has a great article about a do-it-yourself radar system build with PIC18F452. It’s a great hobby project although the schematic is very complicated. This project uses three main devices to create a personal radar system. The IR....

LCD initializations in 8051 C programming words What is the logic behind the serial communication As in, how long should the SIG send out pulses and what should the delay be These statements are used to tell the compiler that a 16X2 LCD is connected to the....

In previous article about the Atmel AVR We have only blinked with LEDs, without influence of events outside the microprocessor. All ports operated only as outputs, there was no input. Now we will show how to connect control buttons to the microcontroller and....