rotaryswitches
I need help naming a type of rotary switch. (If it exists.)
I am looking for a rotary switch with no stopping point, so it would go around and around when turned, repeating each position infinitely.
Do these exist? If so, what are they called so I know what to look for when I try and buy one online?
Thanks in advance!
This should do it. SW1..SW3 are the contacts for positions 2,3,4.
R1 to R3 control the brightness of D1-D3 yellow LEDs, if you increase them also increase R4 proportionally.
R5 controls the brightness of the white LED.
simulate this circuit – Schematic created using CircuitLab
If you have a double pole rotary switch rather than a single pole, you can lose the transistor and R4 and just tie the second set of contacts to R5 to turn the white LED on whenever the switch is not in the 'off' position.
Digikey:
Off-Mom = Continuous OFF momentary ON SPST
Off-Mom-Mom = Continuous OFF two momentary ONs SPDT
On-Mom = Continuous ON momentary SPST
Mom-On-Off = Momentary ON continuous ON and continupus OFF SPDT
Off-On: = Toggle ON/OFF SPST
On-Off: Toggle = ON/OFF SPST
On-Off, Off-On: = Toggle ON/OFF DPST inverted poles
On-On-On-Off = Three continuous ON positions, one continuous OFF position SPTT
Mouser:
(ON) - (OFF) = Momentary both ways
OFF - (ON) = Momentary ON
ON - (OFF) = Momentary OFF
ON - OFF = Toggle
Best Answer
A Rotary Encoder
From Wiki.
The picture above depicts the waveforms found at points A and B of encoder. Depending on which signal (A or B) transitions to next state ,the host can detect the direction. Each click or step is called a detent and is a stable position of the encoder.
A normal connection would like this:
R should be sized in 100s of KiloOhm because in stable state, it will be connected between ground and the supply.
Things to look for
Most important things to look in rotary incremental encoder: