THIS IS THE UNIFICATION OF GEOMETRON AND TRASH MAGIC IN A SELF-REPLICATING SET
Materials
- 3x$12 = $36 pololu robotics stepper driver
- $15 bojack capacitor kit
- $6.32 10k resistors 100 units
- $10 50 pin 0.1 inch pitch right angle header strips
- $7 50 units LM358P op amps
- ribbon cable from amazon
The SlimeZistor is a relaxation oscillator which uses an LM358P op amp to charge and discharge a capacitor through some sample which is connected to the two probe wires. The schematic is as follows, and should be copied and pasted on the bottom of each unit:
These are the kit parts:
Here are links to buy the parts from amazon(enough for about 50 units for about 40 dollars):
- $15 bojack capacitor kit
- $6.32 10k resistors 100 units
- $10 50 pin 0.1 inch pitch right angle header strips
- $7 50 units LM358P op amps
The circuit board is a 1x2 inch rectangle cut out of thin cardboard like a cereal box:
Remove pins 1,2, and 3 of the 8 pin IC:
Assemble as follows, with 0.1 uF capacitor to the far left, then 1 uF and then the two to the far right which are horizontal are the 10 uF capacitors:
This is a 5x blowup of the board, with parts labeled. Replicate this as a tool for replication to carry with you as you replicate the set:
An array can also be cut out using a laser cutter with the following .svg file(cut out a 4 inch square of this, with the blue layer as raster and black layer as cut):
Here is an .svg of just one board:
This is what the bottom looks like after full assembly:
The enclosure is made from 4 squares each 4x4 inches in size cut from corrugated cardboard using the tools of Geometron:
Stack and glue with Elmer's glue or wheat paste:
Second layer:
Add the circuit board to the box before adding the lid:
Full assembly with lid and rubber bands:
Fully assembled system with speaker connected to audio output and a solar panel connected to the USB power:
- boards/trashotron-slimezistor.brd
- boards/trashotron-slimezistor.sch
- buy boards from pcbway.com
- wikipedia link about relaxation oscillator
The board is 2x1 inch and it fits in a cavity centered in a 3 inch by 3 inch cardboard square with ports as shown. Find USB and audio in the trash and another cable from the trash with two wires . This can run on a direct solar panel, since it should work at random voltages.
- 30M resistor
- 10 k resistor
- 0.1 uF capacitor
- 0.47 uF capacitor
- 10 uF capacitor
- link to whole digikey cart
self-replicating cubes from cardboard trash based on a 4 inch by 4 inch square.
