Cardputer-Adv: Compact Programmable Platform for Embedded Prototyping & IoT Development

I was reading the latest version of Make: Magazine, Make: Magazine, Volume 96, and I discovered this cool hardware based on the ESP32-S3: M5Stack Cardputer Adv Version. They are out of stock at the moment but I will have to check back later because I think I would love to have one of these!

555 timer

One day I intend to Build My Own 555 Timer.

In the recent past I posted How a 555 Works as a Timer which refers to an interesting video on the topic.

In that video the speaker gives us a mnemonic for remembering the transistor schematic symbols. Referring to the direction of the arrow on the symbol the “NPN” transistor “Never Points iN”. Good to know!