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
Ben Emmett
Why Are Complex Numbers in the Discrete Fourier Transform?
Why does the Fourier Transform generate complex numbers in the frequency domain? The Discrete Fourier Transform (DFT) of a signal x (lower case) generates a… Read More »Why Are Complex Numbers in the Discrete Fourier Transform?
Ugly Remote Control Battery Mod
I modified the remote control for my office light & fan so that it takes a 9 volt battery instead of the “23A 12V” battery… Read More »Ugly Remote Control Battery Mod
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++ Code Templates
Here are a couple of basic start point templates for C++ programs. The code can also be found in this Github repo. Input Argument Parsing… Read More »C++ Code Templates
Python Code Templates
These python code templates are based on software tools that I have developed lately. They can be a helpful reference for future projects. The code… Read More »Python Code Templates