- We’re going to use transistors (the normally open and normally closed valves). These are activated by a pressure on their blue tube (gate).
- Build the breadboard setup. Use the yellow plugs to ensure the tubes don’t pop out.
- Turn on the pump. Deactivate and activate the flag by (firmly!) squeezing the bulb.
- Now replace the normally open transistor with the normally closed one. How does this change the functioning of the circuit?
