Adding third hand to guitar play

Playing a guitar is fun as it is. But if you are a bit more nerdy, then why not adding something weird to it to amaze friends. Youtuber Make It And Fake It have been tinkering with Arduino, servo and couple of chopsticks and put together a crude guitar attachment which can stroke strings with different patterns. The functionality is yet still limited as for different strokes it needs reprogramming with three control buttons. For more functionality additional coding might be needed. The fun demonstration at the end of video proves to be real fun from both – funny and practical side. With a bit of tuning one hand really can be free to play another instrument to make song even better. Servo motor seems to be too loud while … Continue reading

An Arduino based IC tester with smart touch

IT is always a good practice to test every electronic component before mounting to PCB. You never know weather it is faulty, or worse counterfeit. Logic IC’s aren’t exception. With this smart IC tester, all you need is to wack it in and confirm it is working as should. The other potential other of IC tester is detecting unknown ICs on the fly. The design of IC tester consist of several building block including Arduino Mega 2560, 2.4 inch TFT LCD. Custom IC tester shield PCB with ZIF socket. Arduino code is located at git repository where you might find updates and feature enhancements. Probably the most tedious task was to rpepare IC database which is saved as .txt file on SD card. Currently the list is very short and … Continue reading

Biomedical engineering at your home – DIY PPG sensor

Photoplethysmography (PPG) sometimes called pulse oximetry is on of the easiest ways to get heart rate information. With a little more analyze and signal processing it is possible to extract even more information related to your heart condition like arrhythmia. But first lets focus on how to acquire PPG signals with the things you might have lying around. SteveQuinn have built a PPG device around Arduino Mega2560, 128×160 TFT LCD, and several passives. The measuring of PPG lies on blood perfusion to the dermis and subcutaneous tissue of the skin. Every cardiac cycle pumps blood to peripheral organs and this flow change can be measured with simple optical method – LED and photo diode. There are two ways of measuring PPG waveform – transmissive and reflective. Transmissive method seems to … Continue reading

Arduino based GPS data logger to SD card

You can use GPS data for many interesting projects and experiments. By analyzing logged data you can track the movement of the object, analyze you hiking route, RC plane model, weather baloon and other crazy stuff. Building such logger isn’t very complex task as it involves only standard modules and practically no soldering needs to be done. Almost all standard GPS modules support so called NMEA0183 data format – a short message which contains all data including position and time stamps. Once connected, GPS module automatically sends this data via serial interface. Arduino simply needs to capture it and store data to memory like SD card. In this project, data is stored in FAT32 (or FAT16) formatted SD card. Arduino accesses SD card through SD card V4.0 shield. This is … Continue reading

Laser engraver controlled by Arduino

Laser engraving can be a great way of adding ornaments, labels and other graphics on wooden surfaces. Nobody wants to buy industrial engraver for hobby projects, and if you follow MichielD99 instructable, you can build one by yourself. He used 1.8W 445nm laser module which is enough to burn engravings on wooden surface, but not close to laser cutting. He build his own parts out of MDF boards. Electronics part consist of Arduino UNO which drives two stepper motors by using motor driver boards. Arduino by using pen source grbl-mster software library accepts Gcodes to drive the laser position. Images can be generated with software like inkscape which supports the extensions provided by himself. He tried to keep make all system free and accessible for everyone , so he used … Continue reading