TTL Counter (CB21360E)

This counter from 0 to 9999 was found in English documentation. The power source must be 5V with at least 1A.

Constant current source (CB21992E)
Using a CA3130 and a power transistor, this circuit can deliver a current of up to 500 mA with the...
NiCad Charger (CB15654E)
Rechargeable Nicad batteries type AA, C or D can be recharged with this circuit, which is nothing...
1 kHz CMOS VCO (CB1528E )
We found this circuit in a 1977 CMOS oscillators documentation. The power can be sourced with...