David engineered this circuit consisting of an ADI accelerometer (top) feeding an opamp with gain set to match the 2/3 Vcc operating point of the 555 timer modulation input. The 555 pwm output drives a 15 amp darlington power transistor (right) with a 12vdc incandescent lamp for a load. The circuit is perfectly balanced. Our plan is to secure the accelerometer underneath our trampoline with light weight shock cord. The result is lighting that responds to the users bouncing and jumping.
