J Thread Starter john4444 Joined Dec 13, 2016 2 Dec 5, 2021 #1 Any suggestions on how to switch a negative 12V 3A supply with an Arduino? Low cost so preferably not a relay! Thanks.
Any suggestions on how to switch a negative 12V 3A supply with an Arduino? Low cost so preferably not a relay! Thanks.
dl324 Joined Mar 30, 2015 14,321 Dec 5, 2021 #2 Welcome to AAC! john4444 said: Any suggestions on how to switch a negative 12V 3A supply with an Arduino? Click to expand... As in on or off? Use a suitable MOSFET; P channel or N channel.
Welcome to AAC! john4444 said: Any suggestions on how to switch a negative 12V 3A supply with an Arduino? Click to expand... As in on or off? Use a suitable MOSFET; P channel or N channel.
ronsimpson Joined Oct 7, 2019 2,008 Dec 5, 2021 #3 +5V is the supply for the computer. -12V is the supply for the load. R1 is the load. "in" goes to a IO pin on the computer. Then "in" is not connected or below 0.5V, Q2 is off. When "in" is at 3 to 5V, Q1 and Q2 are on.
+5V is the supply for the computer. -12V is the supply for the load. R1 is the load. "in" goes to a IO pin on the computer. Then "in" is not connected or below 0.5V, Q2 is off. When "in" is at 3 to 5V, Q1 and Q2 are on.
J Thread Starter john4444 Joined Dec 13, 2016 2 Dec 6, 2021 #4 Thanks very much. Won't be able to try it out for a few days but looks good!