(from the project archive)
I wanted to install the option of an alternate Microphone for a Yaesu mobile radio which uses a modular (RJ11) type hand mic, whilst keeping the original microphone DTMF Functions.
I made this modification because I want to use the Headset from my Hand Held Transceiver, a Pryme SPM-1500 Throat Microphone, with my mobile unit for a hands free operation. This would also block out noice form my car stereo, or noise from other influences like a rolled down window.
(another project from the archive)
I built a capacitor pulse bank a while back. It was installed into a large suitcase, and was using Electrolytic capacitors (so no super-fast rise times, but a fairly decent amount of energy density for the cost).
Caps: 6x caps rated 5600uF @ 500V ==> E =(1/2)*C*(V^2) = 4.2 kiloJoules of energy.
The Pulse Bank was designed to fit into a Pelican 1600 case for durability and ease of transit. The case included a wired remote control, the capacitors, and a triggered spark gap. It was fairly simplistic in design, but useful for a time. While most of my project videos and files were lost in a set of failures long ago (who would have expected an entire RAID 6 and backup system to go within the same week), these photos are here at least as what was recoverable.
This project is a favorite of mine, and the one shown here was built for the “laboratory of the Scientists from Krypton that saved Superman from the exploding planet room thingy” of a past event.
The Jacob’s Ladder is a pair of vertical (or in extreme cases, horizontal) electrodes that are parallel to each other and connected to a source of High Voltage. The air between the bottom of the electrodes has a Dielectric Breakdown due to the high voltage potential and creates an Electrical Arc.
(another from the project archives)
I have been interested in the quirky sides of electronics for as long as I can remember, but I don’t know how Nixies evaded my eye for so long. Only during my first semester of college did I come across them. Such an awesome looking display, the 3D look to it and the glow of a tube-like device. Like many before me, I instantly decided that I needed to make a clock.