IR Remote Volume Controller * General purpose infrared remote control receiver with RS232 output * MAX3420 - Maxim USB Peripheral Controller * Make a USB remote control receiver * Adjustable Voltage motor controller for motor testing * Talking to Your Gadgets Remotely * A remote controlled RGB light bulbs lamp * Make an Adjustable Voltage motor controller for bench top motor testing * 3in1 Stepper Motor Controller * Active Bass & Tremble Controller * Build A Motorized Window Blinds Controller Digital Clock with PIC16F84A This is a small ajustable clock, It’s made based on PIC16F84A microchip.The hardware part is very simple because it only uses 74hct238 demultiplexer, 4×7 segments, and some rezistors. The software part is programmed through a device connected to serial port with icprog and made/debuged with MPlab. OBD2 ELM327 compatible AllPro adapter with USB Posted by admin on April 20th, 2 This project is a Microchip PIC microcontroller with an RS232 serial interface on one side and an PS/2 (keyboard or mouse) interface on the other. The PS/2 interface uses bit-banging on a 12F683 device. The PS/2 interface operates as a host and initialises the keyboard or mouse before going into a never-ending loop of reading the data and sending it to the RS232 interface. LM4780 Micro-Amplifier Mark designed a very nice micro-amplifier based on LM4780 IC which is a 60W stereo power amplifier. His design consists of two boxes. One for the main amplifier and another for the power supply. He also included a thermal shutdown feature. Complete schematics and design photos can be found on his site below. Wireless Interactive Media Player (WIMP) WIMP is a project developed by 5 students as the 4th year project and supervised by Professor Trevor W. Pearce of the Department of Systems and Computer Engineering at Carleton University. But, what the heck is WIMP ? As the title says its a wireless interactive media player, basically a MP3 stereo system with a wireless link to a PC. Currently the students are still working on the project, but I can see some serious applications, for this system in the future, so good luck guys in finishing the project and scoring nice grades. [via] AVR audio spectrum analyser on dot LED matrix display This AVR fast Fourier Transformation implementation is actually a modification of Chan’s Audio spectrum monitor. Program is implemented on Futurlec Atmega32 control board. Cemo has adapted this project for 16×16 dot LED matrix display. You can download the entire project from AVRfreaks (including demonstration movie). LM3886 Power Amp with DIY Chassis This is a simple chassis using just 4 aluminum panels and 2 heatsinks. Designed around dimensions to tightly pack in a LM3886 chip amp kit. The top and bottom panels sit in ridges cut into the heatsinks with a table saw, and then the front and back panels just bolt into the end fins. Rear panel fixings are held with M3 nut and bolts, and panels that join to the heatsinks are held by M4 bolts tapped directly into the heatsinks so no additional brackets are required. Heatsinks are 75 x 160 x 50mm with a 10mm thick base. Open GPS Tracker The Open GPS Tracker is a small device which plugs into a $20 prepaid mobile phone to make a GPS tracker. The Tracker responds to text message commands, detects motion, and sends you its exact position, ready for Google Maps or your mapping software. The Tracker firmware is open source and user-customizable. The current supported hardware platform is… AVR Sound Effects Processor This project devised by two Cornell students in 2003,they wrote: For this endeavour, we first built an input stage that will amplify the input signal, as well as bias it to 2.5V (since the ADC can only sample positive signals). The ADC (MAX1111) is controlled by the microprocessor (Mega 32) using the SPI interface which was much easier than manually configuring a port to interface with the ADC(believe me, we tried that). We set the Mega 32 to sample the input at about 12 KHz which is fast enough to meet the Nyquist requirement for analog to digital sampling. The digital effects were done using by manipulating the input (which will be discussed in the Design page) and the output is passed to a R-2R DAC to a output amplifier stage and finally, to the speaker. [via] GPS LCD Display Project The circuit it’self is pretty simple, take in the data on one pin, parse it, format it and then display it to a 4×20 LCD module (Hitachi Chipset). That is the basic idea, but you might add in somthing like a mechanical encoder that would allow for changing options or changing settings in the display unit. This might be as simple as a SPDT (Singe Pole Double Throw) switch if the options are as simple as two settings. [via] |
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