Ciat-Lonbarde 晶森品

七管电风 Sidrassi Organ

Radio Zither 电子古琴

三角电脑 Trimin Triangle

Namastitar Lute 三弦吉他

四马火啸 Fourses Fyrall

石工盆景 Masonic Planters

Paper Circuits - Greyn - DDDM2 - Rollz-5 - Stuber - Cocolase - Prismatic Zuchini - Ambrazier - Din Datin Dudero - Shinths - Princeps - Cianbara - Crowns - Scrolls - Sejayno

三角电脑 Trimin

The trimin is like a theremin, but in triangle form. It is a radio instrument- you do not need to touch it- it is a tribute to our souls which have no body. With three antennae, it goes beyond the theremin's simple tone, and develops cross modulations in the radio realm, producing more possibilities for complex timbres. It has three audio outputs, but it also transmits to any AM radio, so you can dial further sound possibilities between the stations.

三角电脑，无线乐器，三角形式。无用触摸，只要动静，乙醚交通。有三天线，互相影响，超过单音，开发扭曲口音。有三个声音，也可以给收音机发送讯息。

Christmas Jam 1 - Christmas Jam 2 - Trimin 1 - Trimin 2 - Trimin 3 - Trimin 4 - Trimin 5 - Trimin 6

I will contact you ASAP after payment, to notify you of the ETA.
买后，我给你打网，告诉制造的时间。
Peter Blasser, 410 362 8364
I sleep in your bookshelf, I charge in your fridge. Lying upside down, hearing a train, leaves wagging in the wind.

Experiment done with trimin: wrap a coil of wire around stem of "Wandering Jew Plant" so that it becomes a reflex antenna. Listen via radio umbilical to reactions to different kinds of colored lights:

The Trimin is a silicon version of research done with the Vacuum Tube Trimin: A New Experiment in Vintage Electronics, The Medieval Age of Tube Radio, crossed with Leon Theremin's zen simplicity.

This Tri-Min has three radio oscillators that control a Green CRT tube. It is very sensitive to human movement, capacitance, and it heavily interacts with a wide range of stations on the AM band. As Shown, it has steel peacocks acting as antennae. It has no "audio out"; it is played by moving portable transistor radios within range. It is solid wood "3rd World resourcefulness", with some clear "That 70s Show" plastic, as well as vintage tubes and knobs. Thanks to Dan Conrad and the Baltimore City Schools for letting me reuse stuff that would be thrown away!

It is quite hard to describe what it does, only that you can dance around it and the green ghost will follow your dance. In the viewing window, you can monitor the red glow of the tubes.

Here is a detail of one side. Note the turned-wood, hand-wound coil in the center. There is an antenna connection as well as modulation output for weaving the signals.

Here is a simplified schematic of the radio circuits. (click for larger view). Each hartley oscillator has a 50:100 coil of fine wire and a variable capacitor. It is buffered by a second triode, which then feeds a mixer pentode (note there should be a 1M resistor on the pentode grid and supressor). The output of each mixer pentode goes to the CRT as X, Y, and Z (intensity). Thus you see a woven pattern based on the interactions of the three radios.

For the CRT tube I used a 5CP1 for which I also salvaged a heavy-ass transformer, which generates the +1500 and -1500 volts for Anode and Cathode, as well as +400 volts for everything else. I have a dream of making such high voltage stuff with silicon solar panels, converting high current to high voltage via switching inductance.

Here is the first prototype, horizontal projecting tri-min. Similar schematic, except the variable capacitors all feed back into each other. Much more chaotic.

Start planting!! Enjoy weeds!! Cactus barbs are sharp!! Relish the romanticism of dinosaurs without burning their bodies!!