Repair and Cleanup of a ESI 250 DE Universal Impedance Bridge.
A GPS disciplined 10 MHz oscillator and distribution amplifier project using a Sparkfun Pro mini microprocessor and an Isotemp 134–10 OCXO. (Click on images for larger version)
Cleanup, repair and Calibration of a Power Designs Inc. C500 Precision DC Source.
Cleanup and Calibration of a Power Designs Inc. 2005A Precision Power Source.
Repairing and clean-up of a Hewlett Packard (HP)5300B Measuring System with a 5305B 1,300 MHz Counter module.
This was supposed to be just a clean-up project, but this one turned into a bit more work that I had expected.
Restoring a Power Designs Inc. 6150 power supply
Bringing a Power Designs Inc. 6050D Universal DC Source back to life.
Constructing an ATtiny85 breakout board for prototyping and testing.
Building a 10 volt reference using some vintage AD584 IC’s from 1983.
Teensy 3.5/3.6 Breakout Kit (Revision A, DIP-64)
Assembly of a 64 pin breakout board for the Teensy 3.5/3.6 USB development board. Continue reading “Teensy 3.5/3.6 Breakout”
A project to design and build a Low Noise Amplifier (LNA) and 1,090 MHz bandpass filter for receiving ADS‑B transmissions on a Software Defined Radio (SDR).
Construction and circuit information for the DIY Open EVSE V4.23 electric vehicle charging system.
The DIY Open EVSE circuit board Version 4.23 is used for electric vehicle charging using the J1772 standard. It is an Open-source hardware project which uses the GNU General Public License and is based on the original designs by Chris Howell and Lincomatic. Continue reading “DIY Open EVSE V4.23″
Quick Projects Update
A new project for 2017, the dual channel 300 W
programmable DC electronic load. Continue reading “Linear MOSFET Electronic DC Load — Part 1″
4‑Wire DMM Shorting Plug construction project
This was a quick project to construct a 4‑Wire shorting plug for my recently acquired Keithley 2015 benchtop THD Multimeter. Continue reading “4‑Wire DMM Shorting Plug”
An updated version of the
Voltage Reference Quad Project’s circuit board.
This is my version 2 board update, which incorporates supply voltage regulation, over-current protection, and trimmer for the 5.000 volt reference all on the same board. Continue reading “Voltage Reference Quad Project Version 2 — Part 1”