I have a water tank and I have three of these float switches mounted at various depths: https://www.amazon.com/Black-Sensor-Controller-Liquid-Switch/dp/B073LN5PP8/ref=sr_1_15?s=automotive&ie=UTF8&qid=1506363848&sr=1-15&keywords=water+level+sensor ] When the float is raised in the horizontal positio…

Is a pullup resistor always required for a switch?

Grumpy_Mike September 26, 2017, 5:08am 17

This link might help you :- Inputs

Topic		Replies	Views
Why are switches followed by a Resistor? General Electronics	25	9393	May 6, 2021
Sensitivity of inputs? Troubleshooting	26	11093	May 6, 2021
Problem with using a pull down resistor to prevent floating input pin General Electronics	24	8949	May 6, 2021
help a noob understand PULLDOWN/PULLUP through the online forest of information General Electronics	17	2559	May 6, 2021
Did I stick the 100ohm resistor in the wrong spot? General Electronics	17	2253	May 6, 2021