Turn-key PCB assembly services in prototype quantities or low-volume to mid-volume production runs

Turn ON or OFF TV with TV-B-Gone

Are you tired of LCD TV’s around you in public place, or restaurant. Tired of advertisements while you want to have peaceful time. Didn’t you think how good it would be to have magic remote control that could turn those annoying screens off. TV-B-Gone kit might be just what you need.   This fantastic remote can turn off almost all popular TV’s including latest plazma. Thanks to 4 IR LEDs used, distance may reach more than 100ft. The device uses Attiny85V microcontroller for storing 50 most common codes. You can download project files or buy a kit, and this way support author for nice ideas. Continue reading

Control up to 8 devices with IR remote

This cool device can be used in many areas. You can connect up to 8 different devices to 8 relays and control them remotely with IR transmitter.   The whole system consist of two parts: IR transmitter and receiver with controlled relays. Transmitter sends RC5 format IR signals modulated to 38kHz carrier. Code is generated by PIC16F630 microcontroller depending on which key is pressed. Receiver also has same PIC16F630 on board which decodes received signal and activates related relay. If you like this project you can build it by yourself as all necessary files are available for download. Continue reading

Simple and cheap AT89S learning board

If you decide to learn microcontrollers you always need a real board to test programs in reality. Using development boards rather than simulators is more exciting as you can see really working results…or not:). Tahan Prahara have developed simple cheap AT89Sxx development board that every beginner can build for learning assembly or C language programming.     Board can be equipped with one of 40pin MSC-51 series microcontrollers: 89S51, 89S52 or 89S53. S letter means that these microcontrollers are ISP programmable. Board schematic is simple as it has plain 32 GPIO pins available including serial port communication TxD and RxD pins. It is powered via simple 5V voltage regulator circuit. ISP programming adapter probably is the lowest budget. Personally me – I wouldn’t recommend to use it without additional protection circuitry like 74HC244 buffering. But anyway this also works ok if there is no power problems. PCB is single side and easy to build by using any methods you use at home including Laser printer toner transfer or ultraviolet exposing. Continue reading

Proteus projects and tutorials

Today you don’t have to mess with wires in order to program and run microcontroller programs. There are so many tools that allow you to develop complete projects, simulate and debug them like they are real world examples. smainj in his French page has compiled ad nice collection of Proteus projects mostly for PIC microcontrollers.   His projects include positioneer, simple security system, data acquisition system with 16 analog and 16 digital inputs. But most exciting thing is that he publishes nice tutorials on how to set up embedded projects on Proteus Design Suite. Video projects include: -Designing a Schema Using ISIS; -Using mikroC compiler to Write a program for PIC16F; -Simulating programs; -Converting circuit to PCB; -Sending information from Computer to LCD Using virtual USART communication; -Software development : VB.NET and setting simple COM port communications; -Analogue simulation using PROSPICE; -Simulating ASM programs; -Viewing variable using Watch Window. Despite language is French, but video tutorials are self explanatory. Continue reading

Fun with Tengu project

Do you know what is Tengu? It is known as a toy which responds to music sounds and animates along with it. Tengu analyses sound and according to it’s loudness or other parameters it changes faces made of LEDs or other imaging device. Alex inspired by original Crispin Jones Tengu have decided to build one on his breadboard. He used a LED matrix for displaying face.   Tengu heart is an Atmega48 microcontroller running at 10MHz speed. Sound sensor is based on electret microphone from old mobile phone and LM386 operation amplifier. Sound is sensed on AVR ADC input and according to its level the face is updated on LED matrix. Simple and fun. Want to build one – project files are available. Continue reading

RC5 code analyser

This small adapter allows to experiment with various RC5 infrared adapters. It simply reads IR signals lets say from remote control and gives a code. Holger Klabunde have constructed couple versions of RC5 analysers: One stand alone with alphanumeric LCD second sends code via USART to computer COM port.   Circuit uses TSOP1736 IR receiver modules that are optimized for 36kHz carrier signal. RC5 tester also accepts extended codes – up to 128 commands. Continue reading