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by JGrave
Fri Feb 14, 2020 2:53 pm
Forum: General discussion
Topic: Which resistor and diode to use ?, for tip120 for 24v solenoid valve.
Replies: 14
Views: 523

Re: Which resistor and diode to use ?, for tip120 for 24v solenoid valve.

Since you're dealing with 24v and not 3v or 5v, a diode across the solenoid makes a tiny bit more sense. Still not technically required. Using a higher voltage FET like IRF840 would make it generally pointless. But those HV FETs are not 10 cent parts, maybe even up to 30 cents ea. The price does no...
by JGrave
Wed Feb 12, 2020 4:02 pm
Forum: General discussion
Topic: Which resistor and diode to use ?, for tip120 for 24v solenoid valve.
Replies: 14
Views: 523

Which resistor and diode to use ?, for tip120 for 24v solenoid valve.

Greetings to all in the forum. I have found good schemes to control 12v soleniod valves, which I show in the image. But I have 24v 9.5w solenoid valve. Does the same resistors and diodes help me? If not, which ones should I use? Resistor: 180 ohms (I've seen schemes with 390 ohms) Diode: 1N4004 Than...

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