This 8051 microcontroller-based control circuit adjusts the speed of a small permanent-magnet dc motor via photosensors (see the figure).

To program these chips, [Aaron] first had to wire up the microcontroller into a circuit. This was just a bit of perf board, a resistor, a few caps, and a USB A plug.

Although this circuit connects the DS18S20 1-Wire temperature sensor to a Cypress CY8C26443 PSoC microcontroller, designers can easily adapt it to connect other 1-Wire devices to any microprocessor.

On a microcontroller, though, you’ll have to roll your own CPU load meter with a few parts, some code, and a voltmeter. We like [Dave Marples]’s simple approach to quantifying something as ...

The Raspberry Pi Foundation has announced the Raspberry Pi Pico, a $4 microcontroller. The computer features the new RP2040, which will also show up in other products, thanks to the foundation’s ...

In this paper, a simple cryptography algorithm for microcontroller was proposed for data (text) encryption and decryption. This algorithm can encrypt text (8 characters) with 8 key characters.