"John Fields" wrote in message
...

I do not see any power or ground connections to the ICs. The 74HC194s
should
have ground on pin 8 and Vcc on pin 16. The 74HC00 should have ground on
pin 7
and Vcc on pin 14.

---
Good catch.

'HC164s, BTW and, for Ian, Vcc is 5V.

So I need to step the voltage down from the 9V source, ie: about a 220ohm
resistor from the positive rail to pin 16 on each 164 and the 00?

IanW


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