This is my first post.
I’m building a dyno for mopeds/motorbikes and are going to use an arduino uno together with Simple Dyno software.
I need a way to pick up engine rpm and found this circuit:
My problem is the pins of the ne555 in the circuit I found is not named correctly.
Pin diagram for ne555:
Here’s the pins I’m pretty confident about:
Pin 1(gnd) - Ground
Pin 3(output) - Out (to arduino)
Pin 7(discharge) - DIS
Pin 8(+Vcc) - +5v
and the one’s I’m not confident about at all:
Pin 2(trigger) - IN-?
Pin 4(reset) - not connected?
Pin 5(control voltage) - not connected?
Pin 6(threshold) - IN+?
If there’s anything else with the circuit worth commenting on, please feel free to do so.
I’ve just started learning electronics and hope to in time be able to figure out stuff like this myself but at the moment I’m really eager to get this dyno up and running!
Picture of the dyno project attached.