ericgibbs Well-Known Member Most Helpful Member Apr 28, 2009 #41 Connecting the n/o switch from the +V rail to the input pins of the 1st 4093, [pins 1 & 2] would be equivalent to having the beam 'unbroken', the relay would energise. Last edited: Apr 28, 2009
Connecting the n/o switch from the +V rail to the input pins of the 1st 4093, [pins 1 & 2] would be equivalent to having the beam 'unbroken', the relay would energise.
C carlson New Member Apr 28, 2009 #42 Fantastic Thanks heaps for your help I'll add a 2k7 resistor as well