This circuit was obtained in the 1990 Motorola Linear Databook. The circuit uses a 139 series comparator, but other series can be used. The power source need not be symmetric.
This circuit was published in an English magazine from 1980. The magazine no longer exists, but...
This is the power source suggested in the old European publication for the CB19635E watch. The...
The EVAL-CN0397-ARDZ evaluation board from Analog Devices is compatible with Arduino shields to...