Are we allowed to put a resistor on the robot

[Lalaland1125]

Our team has two 12V and two 24V solenoids, all of which we need to use.

We were thinking that we could power the 12V solenoids off the 24V solenoid breakout with a ~273 ohm resistor(from our math/measurements).
(We also tested with a 300 ohm resistor and it worked)

Is this legal for competition?

(We know that the "suggested" method is to use spikes, but if this is legal it would heavily cut down on the wiring, programming, space use, etc).

[Alan Anderson]

I won't comment on the legality of modifying the power path going to a pneumatic solenoid valve. I will instead suggest an alternative:

Use a second Digital Sourcing Module and Solenoid Breakout, powered by 12 volts. The power distribution diagrams include an example of this usage.

Or replace two of your solenoids so they all use the same voltage.

[MagiChau]

Seems to be against the rules with [R47]

[R47]

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 circuitry connected to the Robot’s electrical system is acceptable, if the effect on the Robot outputs is inconsequential.

[Al Skierkiewicz]

You can drive your 12 volt solenoids from a Spike. Remember that the two output pins on the Spike can be driven independently if the common on the solenoids is tied to battery common.
You may not use resistors in that application.