Take you measurements with superprobe

Sometimes seems that you can’t find a proper tool that would make your work easier. So why looking – start building it. This superprobe tends to be universal device built around PIC 16F870 microcontroller. It can do many useful things including generating and measuring logic signals, measuring resistance and capacitance, testing frequency and even reading addresses of 1-wire devices with ability to read standard thermo probes. Superprobe idea is taken from mondo-technology website. With some improvements and removing unwanted functionality it became even better. So building such tool isn’t very hard as it uses very few components, and there is always a room to add more functionalities at your desire. Continue reading

Attiny25 based motorbike gear indicator

If you own an older motorcycle, this tune-up might be worth your attention. Wouldn’t it be a fun actually to see the gear shifted on instead trying to sense or remember? So this project is a simple motorcycle gear detector that actually can fit for many motorcycles because it uses direct external sensor based on hall sensor and magnet fixed to gear shift lever. Project is based on ATtiny25 microcontroller which is powerful enough to read two hall sensors and display info on two seven segment displays through 4026 counter/decoder. Even if motor is turned off – the current gear is stored in EEPROM. I’d say this is a little handy circuit worth trying. Continue reading

Interface CD/SDHC cards with ATmega

SD/SDHC cards have lots of memory that may be useful in many embedded projects. Interfacing them with microcontrollers is fairly easy. In this project there is couple of examples on how to interface and read these FLASH cards with ATmega8 and ATmega32 microcontrollers. Code also supports FAT32 file system. So it makes easy to transfer data between devices and PC. So if you are looking for a way to add lots of memory to your project this is right choice. Continue reading

Sound based navigation

We are all used to GPS navigation and know that it mainly displays/tracks position visually. What if we would look at navigation process from different perspective? So this is what following project is about. Same GPS, same digital compass but no visual aid, just directional audio on headphones. Device can guide you to predefined place by sending sound pulses to headphones and this way creating a directions where to turn. It generates PWM signals that are sent to headphones and depending on direction these signals differ. Human has to detect this difference in order to turn. Depending on different users there were about +/-10 degrees of error, but still this device may have a great potential for blind people and of course for fun. Who knows it may be a … Continue reading