This is a PCB version of my earlier digital signal generator that generates a crystal accurate square-wave signal from 2Hz to approximately 33.5MHz in precise steps of 2Hz. The frequency is continuously adjustable over this range using a rotary encoder, or you can enter an exact frequency using a numeric keypad, with…
Visit technoblogy.com → RSS feedOn Hacker News Sep 2016 – Aug 2025
Hardware & Electronics 6Tools & Productivity 3Programming Languages 3
The Walkie-Textie is a simple handheld device with a 12-key keypad and OLED display that allows you to send and receive text messages using the LoRa wireless protocol. It's ideal for situations where there's no mobile signal, such as when you're camping or hiking in a remote area, when you don't want the cost of a…
The Logic Lab provides a selection of 12 logic gates that you can interconnect with patch cables to make a variety of different logic circuits, for experimenting with and learning about logic:
Sound Lab is an analogue synthesiser, consisting of six modules that can be combined in a variety of ways. It uses a single printed circuit board that doubles as the front panel and wiring, with surface-mount components and PCB-mounted controls to make the construction as easy as possible: