AFSK Tone Generator (CB4201E)

We find this encoding circuit in an American 1980s amateur radio documentation. The circuit can be implemented with equivalent modern components.

| Clique na imagem para ampliar |

Motor Starting Circuit (CB13803E)
We found this circuit in Motorola's Circuit Applications for the Triac 1971 manual. The circuit is for ½...
Simple Multimeter (CB16271E)
The assembly of a good multimeter meets only one obstacle: the precision that is obtained depends on...
85 mA Output Operational Amplifier (CB4549E)
This circuit was obtained from an Electronics World magazine from 1992. The circuit provides an...