User manual

55
Fig. 44: Counter with touch contacts
15 Set and Reset
The inputs R and S can be used as for a RS flipflop. They are operated
with two switches here. Additionally, the inputs are applied with
impedances against GND that determine the quiescent state zero. The
first counter stage can be deleted (R) or set (S) as desired now. While
one of the buttons is pushed, the counter remains in the corresponding
condition. The condition of the second counter stage also will no longer
change.
The cycle generator was expanded by another buffer stage in the form
of an inverter with the NAND 3 in this circuit. This measure improves