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19 Jan 2011

This project is a IR signal extender. It can receive the IR signal in one room and transmit it again where the PC is placed.

Philips RC5, RC6 IR extender – [Link]

19 Jan 2011

This is a heat sink calculator program based on formulas from Fischer Elektronik catalogue. The heat sink calculator is very useful when you are choosing power transistors, heat sink etc. for your project.

Software: Heat sink calculator – [Link]

19 Jan 2011

This project is a four in a row game using a PIC microchip 18F252 controller. You can play against one of your friends, while the PIC keeps track of games won and who’s turn it is. The device uses 43 two color 10 mm leds.

Four in a row game – [Link]

19 Jan 2011

This project is a stereo FM transmitter with RDS. The transmitter frequency is controlled by a Philips TSA5511 PLL IC through I2C communication. For the RDS part the author used a programmed RDS IC’s, the MRDS192.

Test stereo FM transmitter with RDS – [Link]


19 Jan 2011

This project is a headphone amplifier based on BUF634 and OPA627. The amplifier operates in class-A.

BUF634 / OPA627 headphone amplifier – [Link]

19 Jan 2011

This project is a LED mood lamp controlled by a PIC microchip 16F628 microcontroller. The device can be controlled by Sony IR remote control signal. The remote control codes are stored in the PIC’s eeprom.

3 Watt LED mood lamp IR remote controlled – [Link]

19 Jan 2011

This project is a Class-A Audio Amplifier based on 2SA1943 and 2SC5200 complimentary transistor pairs. This Super Class-A Amplifier is fully running at a bias of about 1.65A @ 35V, which it resulting in about 58W of continuous dissipation per transistor in the output stage. In this condition, you can highly imagine that the heat sink runs in a hotter temperature, where it can reach approximately 40 Celsius degrees!

Super Class-A Amplifier – [Link]

18 Jan 2011

Join Dave on the search for a single AA cell to 500mA 5V DC DC boost converter chip. Is it possible?, what will he find?, and how long will it take him? What is the Maxim Datasheet FAIL he uncovers along the way?

Let’s Select a DC-DC Boost Converter – [Link]

18 Jan 2011

electronics-diy.com writes:

This is a 1Hz – 2MHz XR2206 Function Generator kit that produces high quality sine, square and triangle waveforms of high-stability and accuracy. The output waveforms can be both amplitude and frequency modulated. Coarse frequency adjustment is accomplished using 4-DIP switch for the following four frequency ranges; (1) 1Hz-100Hz, (2) 100Hz-20KHz, (3) 20KHz-1MHz, (4) 150KHz-2MHz. Frequency output can be fine tuned using P1 and P2 potentiometers.

1Hz to 2MHz Function Generator with XR-2206 IC – [Link]

18 Jan 2011

electronics-diy.com writes:

Measurement of transmitter output RF power has never been easier and more precise. AD8307 USB 0-500MHz RF Power Meter allows to measure the power of transmitters from 1nW to 2W. Output is displayed in dBm, Watts (nW, uW, mW and W range) as well as input voltage. USB RF Power Meter is based on popular AD8307 watt meter IC and PIC18F2550 microcontroller. Instead of using LCD display module the meter connects to a PC via USB port and displays measurements on a computer via USB RF Power Meter software.

0-500MHz RF USB Power Meter using AD8307 – [Link]



 
 
 

 

 

 

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