Fourchem - chain of events

Artificial chemistry with 4 atom types : fourchem

Aluminium-air battery

Checking that the output from the divide by 3 circuit can drive a motor

Divide by 3 circuit using homemade relays

Full adder made from single throw reed relays

A relay oscillator driving a toggle flip flop

A simple SPST relay oscillator

Divide by 2 flip flop made from copper-contact relays

Testing an SPST relay with copper wire contacts

First attempt at a divide by 3 circuit

Reading information from a punched card

Mechanism for advancing a punched card

A better bidirectional movement mechanism

Stepping the platform more quickly

A bidirectional platform stepped by two gravity powered motors

Homemade relay toggle flip-flop fed from a 1.5Hz signal for 5 minutes

Experiment with a mechanism for reading a pegboard memory

DPST reed relay toggle flip flop

Testing another relay

A fluid simulation model of motility and tube formation

Simulated remotely controlled self replication

Bidirectional linear motion from two unidirectional rotating shafts

3D printed relays

A simple 2 motor controller

Modulo 12 counter and clock dividers made from relays

A 3D printed punched card reader

Speed and direction control circuit for a stepper motor, made from relays

Stepper motor driver made from fewer relays

Stepper motor driver made from relays