+ Brymen
with the power supply are much troubles, the most PSU produce some noise, secondly very often a capacitors on output that has enough energy to blow you circuit , and then a current limiter woke up. So i building by myself, a lot different kind of filter capacitors, then variable trigger current protection (0.5A max) then simple circuit on LM10 and darlington transistor as a power repeater . 15W-15V transformer - simple .... so 0.5-15V ; current trigger, 5 digits voltage indicator. Made 1 channel, it will be 4 channels and current trigger linked together using opto, shut down all channels simultaneously - if need. as all 4 channels independent it possible to connect it in a diff variations. the power sequencer, i thing, will be a relay (no idea yet) ....