Souped-Up Reflective Sensor Uses Itself for Wireless Programming

Proximity sensors are common enough in automation projects that we hardly give them a second thought — pick something with specs that match the job and move on. But they …read more Continue reading Souped-Up Reflective Sensor Uses Itself for Wireless Programming

Boards For Playful Exploration Of Digital Protocols

Two pairs of boards described in the article, with toggle switches and RCA jacks, shown interconnected, LEDs on all four boards lit up.

Teaching people efficiently isn’t limited to transmitting material from one head to another — it’s also about conveying the principles that got us there. [Mara Bos] shows us a toolkit …read more Continue reading Boards For Playful Exploration Of Digital Protocols

Did You Know That The Raspberry Pi 4 Has More SPI, I2C, UART Ports?

A pinout diagram of the new Pi 4, showing all the alternate interfaces available.

We’ve gotten used to the GPIO-available functions of Raspberry Pi computers remaining largely the same over the years, which is why it might have flown a little bit under the …read more Continue reading Did You Know That The Raspberry Pi 4 Has More SPI, I2C, UART Ports?