Downforce is a major part of modern motorsport, keeping cars glued to the track at high speeds. However, for small radio control cars, adding a fan for a little suction can achieve even greater feats, ...

The HC-05, a Bluetooth to serial bridge, can be found for around $5 on the internet and therefore may be the cheapest way to add Bluetooth connectivity to your project. However, its default settings ...

I’ve been studying the schematic and noticed that the voltage divider (R8 + R9) is applied on the HC‑05 TX line (pin 5). Since the HC‑05 outputs 3.3V, this divider brings it down to ~2.2V, which is ...