Sine to square converter (CB7329E)

Using a 555 this circuit was found in old documentation, but it is still valid.

| Clique na imagem para ampliar |

Parallel Mode Aperiodic Oscillator (CB5126E)
This circuit was obtained from an American 80's documentation. The transistors can be 2N2222 and...
Low Voltage Flasher (CB6250E)
This circuit was found in Motorola documentation from the 1980s. PUTs are not common components...
5 Voltage Level Indicator (CB4892E)
This circuit is based on an uncommon Texas component today, as found in an American 1980s...