Circuit Lake

How to build Antenna Analyser for ham-radio? this project will show you how to build it. The IW3HEV antenna analyser is a relatively simple antenna analyser designed by pa3ckr. The main part of the project is Microcontroller AVR Atmel ATMega32. It has a 1-60MHz DDS signal generator and uses a homebrew directional coupler plus the Analog Devices AD8302 IF Gain Phase detector. Controlled through a PC's parallel port it can measure SWR, Return-loss, Phase and Z, but It cannot determine the real and imaginary parts of Z however. src Download : Antenna ...

This is an experiment to show how some realtime audio processing can be done with the Arduino. The first set of examples alter an incoming audio signal and put it back to an audio output. Through this project you can achieve effects like Reverb, Phasor, Flanger or Ringmodulator. The second set of examples are outputting computed waveforms like Sinewave, Bell and Xylophone sounds. src

Usbpicprog is an USB in circuit programmer for Microchip PIC processors. The hardware is as simple as possible, the current version only contains one PIC18F2550, 3 mosfets, and besides the connectors a hand full of passive components. As the therm "open source" implies, the hardware design, the software and the firmware are all available for download free of charge. Open source programmer Download hardware, software, firmware usbpicprog.org

If you interested build a Robot that can walk without confused with programming a microcontroller then this project for you. Jerome Demers show you how to build One Motor Walker Robot. This design is base on the principal of B.E.A.M robotics! Building simple and elegant robot inspired by insect. Since the robot build without "brain" part, it only walking without considering its environment. But, if you have microcontroller programming skill then you can developed it further by adding sensor for better walker robot. One Motor Walker Robot in Action Walker Robot Documentation to ...

This PIC programmer supports pic10F, 12F, 16C, 16F, 18F,24Cxx Eeprom. It works with only Winpic800 v.355. The designer said that he have succesfully tried it with some pics; PIC18F252, 18F2455, 18F2550, 18F2520, 16F84, 16F628 and 24C32 eeprom. But firstly, you need program pic18F2550 with hex file by a classical programmer. You can download usb driver, layout of the circuit , all of the pics of the circuit, and hardware setting program here rename the file extension with .rar and document here (PDF)

If you want to boost the output power of your low power FM broadcast band exciters then you can try this project, 40W broadband VHF RF Power Amplifier. The amplifier design is based on the recently introduced (1998) Motorola MRF171A MOSFET. The initial feasibility was performed using a linear RF and microwave simulation package, specifically Supercompact. The project has 40W min output power, 20dB gain, 88 to 108 MHz frequency range broadband, High efficiency, Low component count, +28V DC operation, Integrated 7 pole Chebyshev low pass harmonic filter (LPF), ...

This project will show you how to build DIY LeachAmp 200W Audio Amplifier. Pavel build this audio amplifier based on Marshall Leach project, that's why the amplifier dubbed as The Leach Amp. This HiFi amplifier has a good parameters, enough power reserve and simple construction. This audio project has better output compared to integrated circuits MBA810, TDA2005, LM3886, said pavel. Audio Amplifier Download Document, schematic and PCB pavouk.org