switches
Easy question here.
I'm designing a circuit which needs a switch for the main power supply. I would like a switch that keep the power OFF normally and the power ON while holding the push switch.
Is it what we called a SPST OFF-(ON) switch? How do we call the kind of switches that need to be hold?
If I understand correctly, the NKK M2027 (On-On-(On) SP3T) should do what you want. Just connect the circuit to terminals 2 and 4.
If I understand your question correctly, then this should work.
simulate this circuit – Schematic created using CircuitLab
Values are default. Its up to you to find the right values for each element.
Best Answer
When purchasing switches, the state in parenthesis is momentary. Thus an "OFF-(ON)" switch will normally be open/off, and require you to operate it to close/on the circuit.
The term for any such switch with a momentary position is simply called a "momentary switch" or some variation depending on type (i.e. "momentary pushbutton", "momentary toggle", etc.)