Programmable Timer (CB25200E)

This timer has a divider programmed by BCD switches. The circuit is from a Radio Electronics magazine from February 1989.

| Clique na imagem para ampliar |

Temperature to digital converter (CB21287E)
This '90s circuit found in National Semiconductor documentation uses components from the time. |...
Digital Capacitor 4066 (CB25243E)
The figure shows how to obtain a capacitance digitally with 4066 switches. The table shows the...
Transformerless converter 220 V (240 V) to 110 V (CB1236E)
This interesting AC / AC converter is only indicated for resistive loads and was obtained in a...