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Results tagged with relay
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user 78655
Electrical device which, when energised by a small electrical current (low-power, control circuit), safely switches a larger electrical current (controlled circuit).
1
vote
gpio turning on/off relay, seems backwards
Here is how it works in simple terms.
Consider the following schematic.
Applying a LOW to a lamps turns it on.
It is sometimes referred to as "active low" signal.
simulate this circuit – Sch …
- 662
3
votes
Accepted
why GPIO.LOW is used to turn the switch on?
Here are some ways to connect a bulb.
simulate this circuit – Schematic created using CircuitLab
- 662