I've been trying to adapt the circuit found at thrustgear.com for multiple relays - I figure I can use a DB-9 cable and get control of four pads (or engines) with continuity.
I've been puzzling over the schematic (found at https://thrustgear.com/relayer.pdf) and I'm a little puzzled by the stuck-relay alarm (referenced at https://www.rocketryforum.com/showt...y-launch-controller-plans&p=154172#post154172). It looks as if it will only sound if the igniter clips are shorted - or if an igniter is installed.
Am I missing something?
I'm attaching my attempt at scaling up the circuit to multiple pads.
I've been puzzling over the schematic (found at https://thrustgear.com/relayer.pdf) and I'm a little puzzled by the stuck-relay alarm (referenced at https://www.rocketryforum.com/showt...y-launch-controller-plans&p=154172#post154172). It looks as if it will only sound if the igniter clips are shorted - or if an igniter is installed.
Am I missing something?
I'm attaching my attempt at scaling up the circuit to multiple pads.
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