Locked relay shield (CB8837E)

This interesting configuration was found in a 1965s Electronic Design. It makes use of components of the time.

| Clique na imagem para ampliar |

Modem protector (CB8190E)
This protector was found in an Electronics Now from the 90s. The 250 V transient suppressors are common...
Simple Nicad Charger (CB13200E)
This circuit carries small batteries of Nicad that can be connected in series in number of up to...
Ring Counter using Lamps (CB6599E)
This circuit was found in Motorola documentation from 1966. The lamps are according to power and...