I want to use a DPDT relay it is a 9v rated 420 ohm relay but picks up dependably at 6v. Will the relay cause any problems with the board, having more inductance, than the 6v bulbs it would replace? I would use this to control 2 pin Red/Green LEDs for directional marker lamps. j
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I'd put a diode snubber on it to avoid any inductive kickback. Other than that, it's not going to draw that much current, so that should be fine.
Their switching negative on this board ?? Purple + wire stays permanently on. Just want to make sure I'm pointing the diode in the right direction. j
@JohnActon posted:Their switching negative on this board ?? Purple + wire stays permanently on. Just want to make sure I'm pointing the diode in the right direction. j
Yes, like most boards switching negative returns. Kind of the 101 of modern electronics because N-channel MOSFETs have lower ON resistance and it's easier to implement the gate drive, compared to a P-channel MOSFET switching the positive or "high side".
https://www.youtube.com/watch?v=g8I_upSEGz0
Also- purple wire is PV (Positive Voltage) more or less + right off the main rectifier.
That video link is not about N or P channel, but low versus high side switching. G
@JohnActon posted:Their switching negative on this board ?? Purple + wire stays permanently on. Just want to make sure I'm pointing the diode in the right direction. j
Yes, and remember that the diode should be reverse polarity to the coil energizing power, we're trying to kill the inductive kickback. The cathode (band) should be to the positive PV voltage.
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