The bi-color ones intrigued me however they are a few bucks a piece on digikey compared to tri-color being about a buck a piece.
A consideration with the tri-colour is how the fact you have the common cathode that would somehow have to switch sides if you wanted to run it off a spike switching direction.
Additionally blue and red LEDs run at different voltages so you have to factor in resistors and how to potentially run it off a single spike. The nice part about two sets using the diode breakdown voltage is you can use a single spike and a little breadboard rather than potentially two spikes.
I suppose you could hook up one color to the positive on the spike, one to the negative and the cathode to the negative on the power distribution board.(provided there isn't a rule against this, because it wouldn't be protected by a circuit breaker as those are only on the red blocks) You could also have it merge in with the spikes negative which may violate rule R43) below.
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Originally Posted by R43
Custom circuits shall NOT directly alter the power pathways between the battery, PD Board, speed controllers, relays, motors, or other elements of the robot control system (including the power pathways to other sensors or circuits). Custom high impedance voltage monitoring or low impedance current monitoring connected to the ROBOT'S electrical system is acceptable, because the effect on the ROBOT outputs should be inconsequential.
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