This is the Power & Master Clock board for a Googol Seconds Counter, and will never complete the entire count. A googol is an extremely large number, 10 to the power of 100, or simply stated as 1 followed by 100 zeros. The systematic name can be ten duotrigintillion or ten sexdecilliard. So why build a counter that will never complete? I like a good challenge, and tinkering in my workshop is a favorite past time of mine, and I think this will make a nice display as well.

The Googol Seconds Counter is made in two parts, the Power & Master Clock Board, of which there is 1 board, and the Counter Boards, of which there are 11 boards. Boards are joined with jumper wires. The counter boards are here.

This board features two inputs, +12 VDC and +9 VDC, separated by two Schottky diodes. The 12 volts is primary, and if that fails, 9 volts takes over so the +5 volts is not interrupted. The 5 volt regulator provides power to the two ICs on this board as well as the Reset to all boards connected to it. Test points are provided as well as a Reset button that requires two header jumpers in place to be used. The reset does not affect the CD4060 ICs, only the counters on the counter boards connected to it. The 1 Hz master clock is generated by a pair of CD4060BE 14-stage counters and a 32.768 kHz oscillator.