Battery Status Indicator (CB6064E)

This bargraph circuit is from an ancient American documentation. It indicates the charge state of a set of 4 batteries from 9.6 to 5.2 V.

| Clique na imagem para ampliar |

High Q Crystal Filter (CB19698E)
For the 1 MHz frequency, the pass band of this filter is only 120 Hz wide. The filter is suitable for...
Astable with voltage limitation (CB21826E)
Found in a 1974 Ferranti manual, this circuit uses diodes to limit the voltage on the transistors. The...
12 V output for 5 V regulator (CB8182E)
Found in a 90s Electronic Design this circuit provides an additional 12 V output to a 5 V...