Car Alarm (CB8925E)

This circuit was found in a 80’s Popular Electronics. The components are common and the 8-ohm speaker.

| Clique na imagem para ampliar |

Biestable photo (CB8336E)
This circuit was found in 1967 Philips documentation. It uses transistors from that time....
Current sensor protection with Transorb (CB20396E)
In current sensors such as the INA185 from Texas Instruments, protection against input transients can be...
Sinusoidal to Square Converter 741 (MSB017E)
This circuit converts sinusoidal signals to square. The upper limit of frequency is abour 100 kHz...