.:: Shape Memory Alloy Robot ::.
Shape Memory Alloy Robot
A robot built using an erector set, shape memory alloy actuators, some MOSFETs and a BASIC STAMP microcontroller.
This is the back of shape memory alloy (SMA) actuator that I ordered sitting on top of the spec sheet. Each one requires at least 1 to 2 amps of current in order to contract. Contraction times are less than a second with no load. Then 12 seconds of rest is required before pulling the actuator apart to its original state.
This is a close-up photo of an SMA linear actuator. Notice the protection spring which protects the internal SMA spring from straining itself too much in the case that the load is more than expected. A typical maximum load for such an actuator would be around 1lb. The electrical contacts include the spring-covered chassis and the actuator plunger.