Color Timer with Circuit Python
This color changing timer shows when an hour passes by going from blue to red in reverse rainbow order. It’s a subtle and non-intrusive reminder… Read More »Color Timer with Circuit Python
Electronics
SDR FM Radio with Python
This project uses GNU Radio Companion to generate python code from a flow graph that plays FM radio stations using an RTL-SDR. The screenshot shows… Read More »SDR FM Radio with Python
JDY-40 Wireless Broadcast
A commenter on a previous post asked about JDY-40 broadcasting to multiple nodes, where only a specific remote node will reply to the broadcast. This… Read More »JDY-40 Wireless Broadcast
Simple Game Buzzers with Arduino
My son was in need of game buzzers on short notice. So I put together something quick & simple that got the job done. This… Read More »Simple Game Buzzers with Arduino
DIY GPS Unit with Arduino Uno
This DIY GPS unit consists of an Arduino Uno, SSD1306 OLED display, and BN-220 GPS. It is powered by a 9V battery. In another post… Read More »DIY GPS Unit with Arduino Uno
Arduino Heap Space Workaround
I thought this GPS project would be done quickly, but found myself scratching my head for days on a weird issue. I still don’t know… Read More »Arduino Heap Space Workaround
JDY-41 Wireless Range Test
The JDY-41 is a wireless transceiver module with some improvements over the similar JDY-40 which in highlighted in the post, Simple Wireless Serial Communication. The… Read More »JDY-41 Wireless Range Test
Flashy Paper Christmas Tree
This Christmas-themed paper circuit uses no microcontroller, only a 555 timer and CD4017 decade counter to drive blinking LEDs. The KiCad project and other files… Read More »Flashy Paper Christmas Tree
C Linker and Fresh Eyes
It’s often valuable to set a project down for a while. After setting down the Flight Logger project for a few months, I came back… Read More »C Linker and Fresh Eyes
Simple Wireless Serial Communication
Notes on basic setup & testing of the JDY-40 wireless serial port module. These are simple wireless serial communication modules that work fairly well and… Read More »Simple Wireless Serial Communication