Extended VU Meter LM3915 (CB20610E)

This circuit is from the manual of the integrated circuit used. Similar versions appear on this website and even in this section.

| Clique na imagem para ampliar |

Digital to Analog Converter (CB6673E)
This circuit using only transistors was obtained from Ferranti's 1969 documentation. It can be...
Modulated Light ReceiverIR4199S CB13885E (CB13885E)
This sensitive circuit can be designed with FETs such as BF245 and MPF102. The sensor is a silicon...
Dual tone generator (CB21080E)
Found in Popular Electronics from the 90s, this circuit generates two tones that are selected by a...