From Junk Jack Wiki
The JK flip-flop stores a value (whether digital or analog) according to the J and K inputs, as the output (blue).
It sets the output value on the rising edge of the main >input.
- If J is HIGH and K is LOW the output will set to HIGH.
- If J is LOW and K is HIGH the output will set toLOW.
- If both J and K are HIGH the output will flip from HIGH to LOW or vice versa.
- If both J and K are LOW the output will set to off/inactive.
- A LOW input to the J pin, and an analog input to the K will output an elusive LOW paired with an analog value.
- Analog inputs to both J and K pins will cause the output to toggle between those analog values each rising edge of the >input.
Can be rotated using a spanner.