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

Did you finish your digital thermometer?

I have noticed that there are lots of temperature sensor projects out there in the internet, but the question is how many of them end up to be left on breadboard. I also found myself not hawing one that I could do simple temperature readings when ever and where ever I need. Lets see another simple temperature probe which is also a breadboard prototype. But with some work can be made in to portable probe. rahulkar built this thermometer using Attiny85 microcontroller and LM35 temperature sensor. His probe is able to measure temperature from 0 to 150ºC or in Fahrenheit (selectable with button). Since Attiny is small IC he used MAX7219 7-segment LED display driver which accepts serial data. So he placed five digits to display full range of temperatures. He programmed Attiny85 with Arduino code which takes only few lines. To make probe more useful I would change circuit a bit to extend temperature range to negative as sensor can measure from -55 to +150ºC. Continue reading

Hacking NES controller to work with PC USB

NES game pad has it’s own connector that doesn’t for in to any PC socket. In case you still would like to play PC games with it without breaking then try building simple USB-NES controller adapter. Cool part with this is that adapter can be unplugged any time if you would like get back to console. USB adapter is based on Attiny85 microcontroller running V-USB stack. All it does – reads NES controller commands and sends them to PC. Adapter uses USB HID class, so no drivers are needed. Once plugged in it appears in game controllers list. Tested with Win7 and Ubuntu. Continue reading

Battery powered motion detector for nigh walkers

HackSkunk had and assignment to develop simple system that would allow to detect when sisters son leaves his place at night. So he came up with prototype of motion detector based buzzer alarm based on Attiny85 microcontroller. As circuit has to be active only at night so he put a LDR resistor that cuts power in daylight. The other principle is obvious – microcontroller simply gets trigger signal from motion sensor and then rises alarm on buzzed. No more sneaking around! Continue reading