Printer Error Alarm (CB6519E

Details: Written by: Newton C. Braga

)

This circuit was found in a 80’s Popular Electronics. It issues a warning signal with the signal of the old type printer with parallel port.

| Clique na imagem para ampliar |

Circuit Bench

Divider by 2 or 3 (CB6824E)
Found in old American documentation, this circuit can divide the frequency of a signal by 2 or 3...
Four-Transistor Timer (CB1261E)
The transistors of this timing circuit may be more modern types such as BC548 and BC558. The...
OR Gate Using NAND (CB197E)
An OR gate can be improvised using NAND gates of a 4001 as shown here. The diodes are...