When it comes to electronic design, breadboarding a circuit is the fun part — the creative juices flow, parts come and go, jumpers build into a tangled mess, but it’s all worth it when the circuit ...

I purchased one of each of these cheap sensors recently from aliexpress for testing purposes. Compared with the ubiquitous HC-SR04 (*), I liked the idea of having a combined emitter/receiver, i.e.

Compared to the Arduino Uno of old, modern microcontrollers are absolutely tiny — especially for the amount of processing power and I/O you get. But if you need something really small, like ...

Both of these sensors use the MMC5983MA from MEMSIC - a highly sensitive triple axis magnetometer capable of sensing down to 0.4mG, enabling a heading accuracy of ±0.5°. Output rates of 1000Hz, ±8G ...