Telephone Line Simulator (CB25592E)

This circuit was found in the August 1993 Electronics Now magazine. It is for telephones used on common old-style analog lines.

| Clique na imagem para ampliar |

Current Controlled Oscillator (CB13512E)
This circuit was found in a 1973 publication. The operational ones can be exchanged for...
Magic Neon (CB23643E)
Place the lamp on the ignition threshold via R2. Your approach causes it to light up. The secret is...
RIAA Stereo Preamplifier (CB19520E)
This circuit is from an 80's publication, using components from that time. Integrated circuits are...