Circuit Lake

If you need GSM controller but you are not familiar with microcontrollers then this project is for your. The project consists of cheap GSM phone that has port and can be configured to auto-answer incoming call, DTMF decoder (MT8870) and a few controlling relays. How it works? First call this GSM controller with your cell phone. By pressing on any key on your phone's keypad, GSM controller will receive that DTMF signal and MT8870 circuit will set the appropriate binary value on it's data pins Q1-Q4. Those data pins will turn on ...

PIC GSM SMS Alarm is a electronic project by trax tha has capability to sendi SMS when alarm triggered. It use Siemens GSM phone as sms sender and PIC 16F84A as main processor. The project has 5 inputs so it can send 5 different SMS messages.  Trax said that when alarm condition happens each sensor there will be a SMS text for each sensor input to receive by your cellphone. GSM Alarm GSM alarm Shematic and documentation www.elektronika.ba

The project will show you how to build inductor and capacitor meter (LC meter) with AVR microcontroller ATmega32 as main processor. Sylvain Bissonnette said that this LC meter has few features: inexpensive, high accuration, auto scale, auto calibration, can be use as a frequency meter with only small modification, measure capacitance and inductance. The calculation result will be displayed at LCD. Download AVR LC meter Document, Schematic, Source code Tag: LC meter, AVR project, Measurement tools src

If you need a power supply that can deliver high currents, try to make it from old ATX PSU. You just need a little modification in front panel like what Peter Sandström did. Here few example uses of this power supply: power source for a 12V car amp, cheap alternative for replacing your broken WLAN access point, flatbed scanner, printer, LCD monitor. Download DIY 250W LAB Power Supply Documentation and schematic www.box.net Power Supply Source 250W project detail source description www.spaceorbit.net

VGA Test Box is VGA tester project created by Chris. The goal of this project is to create a device that is capable of outputting VGA signals to a CRT monitor in order to display figures, text and characters. Timing is a core essential in this project. The project use Microchip PIC microcontroller at 4 MHz clock speed. The hardware assembly is just basic buttons, switches & wire that you can purchase from local electronics stores. Download PIC VGA Schematic and Document www.pyroelectro.com

We know that most flashlights require three cells because they are regulating output current with only series resister. The odd number of cells except one is not good, and a margin between VLED and VBAT is too small, intensity of light is affected by variation of input voltage within the battery life. The project is a white LED head lamp which can operate with only two AA batteries. The LEDs are driven in constant current, so that the brightness is maintained until end of battery life. The project designed by Chan White ...

This electronic project will show you how to build simple Line Following Robot. Main part of this project are ATmega8 as main processor, Six photo-reflectors as line sensor, vibration motors to drive the wheel and Two CR2032 lithium cells as power source. Here is short description how it works, The line follower is one of the self operating robot that follows a line that drawn on the floor. The basic operations of the line following are as follows: Capture line position with optical sensors mounted at front end of the robot. ...