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Results tagged with relay
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user 18522
A relay is a part that acts like a switch that can be controlled by an Arduino. They usually are powered by sending current through a coil, which moves a piece of metal to touch a contact within it. (Note there are also solid state relays which act more like a transistor.) The moving parts is why some devices make a "clicking" noise when they turn on/off a light or another device attached to it.
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4
answers
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Multiple non-blocking countdown timers?
I'm building a control system for three sump pumps using a single Arduino and a set of relays. I have float sensors for each one, and need the Arduino to trigger the relays when the float sensors are …
- 7,979
0
votes
Multiple non-blocking countdown timers?
void readFloatSensor1()
{
if (digitalRead(floatSensorPin1) == LOW) // If the float sensor is tripped (pulled low)
{
pumpState1 = RELAY_ON; // then trigger the pump relay … pin
pumpTimerMillis3 = 0; // and reset the timer to 0 for the next trigger
}
}
//========
void triggerPumps()
{
// Toggle the pump relay pins on and off …
- 21