The Problem During short instances of nice weather in upstate New York I enjoy going for a bicycle ride on the local multi use trails. I have to pass pedestrians or slower bicycle traffic and find it to sometimes be a hassle to get their attention. During one of my rides I got to thinking […]Read more "Bicycle Announcer"
I designed a printable enclosure for my DPS5015 power supply. The case is a tight fit but results in a nice compact unit with minimal footprint. An external DC power supply is needed, I plan to use my large Sorensen 150V linear power supply for this. As with most of my designs the first iteration […]Read more "DPS5015 Power Supply Enclosure"
I aquired a car USB charger in need of repair and was inspired by a recent video from the EEVBlog to measure the power efficiency. The device become damaged when the insides flew out during insertion into the 12VDC car jack and the inductor was nearly sheared off the PCB. I was able to reinstall the inductor and slightly modified the circuit for easy measurements and connection to my DC electronic load.Read more "DC-DC Converter Effeciency"
…the thief said “Let there be light. Behold a single candle lit by the joules of a dead cell.”
There is something about LEDs and the joule thief circuit that keeps me coming back. This time around I went for something festive for the December holiday season along with a SMD transformer, no longer will I have to hand wind toroidal transformers.Read more "Single LED Joule Thief Candle"
Since June of 2016 I have been logging atmospheric pressure using a Raspberry Pi B+ and STEVAL-MKI165V1 evaluation module which features the LPS25HB atmospheric pressure sensor. The Raspberry Pi uses a small Python program I wrote to log the pressure data and time to the system SD card and also plot the past 24 hours […]Read more "Atmospheric Pressure Data Logging and DST"
I believe it is inevitable that most newcomers to electronics will at one point or another build a Joule Thief circuit. To me it is the hello world of circuits and was one of the first circuits I prototyped on a breadboard when I first started experimenting with electronics. This multi-LED PCB is a callback to those days, something I wanted to do the first time I laid out a hand wound transformer, transistor, and LED on a breadboard.Read more "Multi-LED Joule Thief"
An ATTINY adapter to make programing with the AVR Dragon simple and quick.Read more "AVR Dragon ATTINY Adapter"