Keyboard Hexadecimal Encoder (CB13763E)

We found this CMOS circuit in a 1978 publication. It allows you to use a standard calculator keyboard with 16 keys for encoding in hexadecimal.

| Clique na imagem para ampliar |

Volt Analog Ammeter (CB7352E)
This analog volt-ammeter was found in an Electronics World of 1968. It makes use of a 0-1 mA...
555 Police Siren (CB25521E)
This is one of the many possible siren configurations for the 555 integrated circuit. We found it in...
Encoder For Binary Switch (CB5026E)
This circuit was found in an Electronics World magazine from 1990. The circuit can be mounted...