Category Archives: Uncategorized

Resolving a Synchro Shaft Angle Using Modern Hardware

This project uses modern data acquisition hardware to track the shaft angle of a synchro transmitter as the shaft is turned through various angles. How difficult could it be to get the absolute angle of a position sensor from the … Continue reading

Posted in Uncategorized | Comments Off on Resolving a Synchro Shaft Angle Using Modern Hardware

Converting a WW2-era Landing Gear and Flaps Indicator into a USB Peripheral

In this project, I convert a WW2-era landing gear and flaps indicator into a USB peripheral using a Raspberry Pi Pico development board and eight channels of programmable current sources. This project is similar to my WW2-era engine cowl flaps … Continue reading

Posted in Uncategorized | Comments Off on Converting a WW2-era Landing Gear and Flaps Indicator into a USB Peripheral

Converting a WW2-era Engine Cowl Flaps Indicator into a USB Peripheral

In this project, I convert a WW2-era engine cowl flaps indicator into a USB peripheral using a Microchip PIC16F1459 microcontroller and four Microchip MCP41HV31-502 digital potentiometers. This project is reminiscent of my USB analog panel meters project but the drive … Continue reading

Posted in Uncategorized | Comments Off on Converting a WW2-era Engine Cowl Flaps Indicator into a USB Peripheral

Building a DIP Switch USB Stick Using the Microchip PIC16F1459

Tired of editing XML and JSON files to store configuration settings for your hardware or software? What if we could go back to using DIP switches for configuration settings? Well, with the DIP switch USB stick, you can! No more … Continue reading

Posted in Uncategorized | Comments Off on Building a DIP Switch USB Stick Using the Microchip PIC16F1459

The Scramblepad Hardware and Protocol

I first saw a Scramblepad on the door of an office building I worked at while in high school in the late ’80s. I always wanted to own one or to make my own based on seven-segment LED displays but … Continue reading

Posted in Uncategorized | Comments Off on The Scramblepad Hardware and Protocol

Building a Simple RFID Door Access Controller

In this project, I build what is quite possibly the world’s simplest (and least intelligent) door access controller to let me open and close my garage door using my mountain bike helmet. We’ll take a look at my motivation for … Continue reading

Posted in Microchip, PIC18, Uncategorized | Comments Off on Building a Simple RFID Door Access Controller

USB Knob Box Doubles as a Blackmagic Designs Camera Remote

I have a Blackmagic Designs Micro Studio Camera I wanted to use as a webcam for video conferences. Even with a 16mm sensor, it has better quality than any small sensor webcam. The only issue is all the exposure and … Continue reading

Posted in Uncategorized | Comments Off on USB Knob Box Doubles as a Blackmagic Designs Camera Remote

The Interesting Multiplexing Scheme of the Grass Valley Series 300 Crosspoint Switch Panel

After reverse engineering parts of a Grass Valley Kalypso video switcher control panel and after making a YouTube video describing how I modified a Grass Valley Series 300 transition logic panel to be a USB peripheral, it was time to … Continue reading

Posted in Uncategorized | Comments Off on The Interesting Multiplexing Scheme of the Grass Valley Series 300 Crosspoint Switch Panel

USB Panel Meters Enclosure and Windows 10 App

In the first part of this project, I acquired four round HUA SO-45 10 mA analog panel meters and built a board to control them over USB as a vendor-defined USB HID device. The next steps in this project are … Continue reading

Posted in Uncategorized | Comments Off on USB Panel Meters Enclosure and Windows 10 App

Converting More Vintage Grass Valley Hardware to USB

In this project, I convert two panels from a vintage Grass Valley video switcher into general-purpose USB input and output devices without modifying the original panels. This project required both reverse engineering the hardware and deciphering the software protocols used … Continue reading

Posted in Uncategorized | Comments Off on Converting More Vintage Grass Valley Hardware to USB