Conductive slime

This is an experiment of using water and flour to create this conductive slime as a tangible control. To acheive this, think of the slime as a potentiometer,  simply read(analogRead Pin) the voltage change of the point where you moved,  then mapping it to the height of the graph.

In this video, the p5 sketch will morph in the corresponding direction of how I shape the slime. 

An equivalent comparison of the diagram:

(I should use a voltage divider so that I only need two wires :)  )

PCB Making: Customized Arduino & A Timer made with 555 Timer

1. Customized Arduino
A self-made ‘Arduino Uno’ tested on breadboard:

Arduino schematic drawn in Eagle:

2. An adjustable timer made with a 555 timer


The previous version with FTDI chip(USB to TTL converter), however, the chip was out of stock so I just abandoned the idea of intergrating it on borad.

Failure on the Othermill machine: It didn’t clear the whole ground surface even though it should according to the Eagle file, then we found the solution of milling one more time using an exported .svg file from Eagle so that we have the “clear all” option in Bantam.

Another way of fabricting PCB is to etch using etchant solution cupric chloride. We made this together on one of xFab’s classes:

Handmade Ukulele(Wood & Metal work made in THU)

Final work

Soft sensors & actuators

A collection fo self-designed circuits and sensors on textile

#1 A stretchy sensor knitted with conductive yarn

#2 A soft parallel RC circuit I want to play with capacitor in a DC circuit that functions as a breif battery to power the LED after disconnected with the power source.

#3 Speaker on farbic
A knitted conductive coil with AC flow through function as speaker

#4 Heating controling & thermochromic ink

A heating controling circuit using QP30N06L MOSFET

#5 Shape memory alloy(nitinol) control Hoberman shpere morphing
(linear motion to whole shpere motion)