- Wed Jan 27, 2021 11:30 pm
#47861
Weaver
Gshorten wrote: this should not kill the TC4424, @ 12v through the 160 ohmHi, Sorry I did not see this sooner. I'll start with your answer which is your 4424 is dead. On the 0.4.4b/c the 4424's output actually goes though a 10 ohm resistor not a 160 ohm, but that is not the cause, though it is an issue. What type of coil are you trying to drive? More than likely it will operate at 5v, many people assumed that a lot of coils needed 12v because the earlier Speeduino boards limited the current to much for them to work at 5v, even though they should have. Switching to 12v, while not technically correct for the coil, allowed it to work with the higher resistance. The cause is that the 4424 is only rated for 18v, and you more than likely had a spike big enough to kill it. If you bought it from me send me a message on my website and I can arrange to get it repaired for you.
Weaver