Control circuits can be connected directly to the line leads (as shown in the diagram), or can be isolated from the power circuit with a transformer. Lower voltages, such as 120 or 240 V, are used if ...

Fig. 2 shows a simple motor control circuit that will only allow the motor to start — and remain running — when its lube oil pump is running, at least one valve is open, and no alarms exist. Pressing ...

[manuka], aka [Stan Swan] is a teacher in New Zealand who enjoys enlightening his students on the wonders of electrical circuits. He primarily uses “snap connector” circuit kits, sold under ...