1-in-4-sequencer freezes up--a noise problem?

I have a 1-in-4 sequencer (a Forest Mims circuit) that turns 1of 4 LED's on in a sequence over and over. I have the output (that goes to the LED's) also going to 4 CRYDOM solid state relays, so that 100 watt bulbs (120VAC) are also turned on in sequence. The problem is that sometimes the sequencer freezes up, or skips one light. Am I getting "backtalk" from the 120VAC that is causing this? Any way to keep my sequencer sequencing?

Bruce in Fresno

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ehsratcliffe
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