Digital Fuel Gauge (CB26173E)

This two-digit circuit was found in the 1999 Radio Experimenter Handbook. It uses the CA3161 and CA3162 A/D converter pair common at the time.

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10 kHz Low Pass Filter (CB14133E)
The circuit shown is suggested by National Semiconductor in its 1994 Linear Applications Handbook. We...
Simple AM radio ZN416E (CB8203E)
The ZN416E integrated circuit is uncommon today. It consists of a complete radio, like the one...
Voltage Reference with the LMV321 (CB4744E)
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