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Whipped Cream Solenoid Circuit

Table Drive Motor Circuit

 

The circuitry necessitated by our design was very simple as you can see. One large factor which allowed us to do this was using limit switches to control the motor instead of the photo-detectors. Limit switches can be connected directly to the handyboard, whereas each photo-detector requires a signal buffer and a debouncing circuit. The whipped cream solenoid is controlled by a TIP 32 NPN transistor which functions as a switch. The DC motor was controlled by a small reed-type relay from Radioshack.

 

Also, we were able to drive the chocolate sauce motor bidirectionally from the handyboard. We hadtried making an H-bridge amplifying circuit to limit the current draw on the batteries. Though we could get the circuit to work when applying a +5V signal, we could not get it to work when using the handyboards motor outputs, so we abandoned the circuit.