873
FREE
circuits!

Recently added diagrams and projects

pages:
Sel 8 Sources Relay
Sel 8 Sources Relay
April 25, 2010

Sel 8 Sources Relay [more]

Baby Watch Out
Baby Watch Out
April 25, 2010

It's a very simple circuit, for the follow-up of baby. It can however be also used for other use, as intercom etc. In the place of M1 we can we use a simple electret mic... [more]

Vu Meter For Power Amplifiers
Vu Meter For Power Amplifiers
April 25, 2010

The circuit accosted in those who they want a Vumeter that will be connected in the exit of power amplifier. [more]

Tube Line Preamplifier Project
Tube Line Preamplifier Project
April 25, 2010

Tube Line Preamplifier Project [more]

Three Tube PHONO (RIAA) Preamplifiers with ECC83
Three Tube PHONO (RIAA) Preamplifiers with ECC83
April 25, 2010

Three Tube PHONO (RIAA) Preamplifiers with ECC83 [more]

Hampton Tube Preamplifier For Moiving Coil cartridge with ECC88
Hampton Tube Preamplifier For Moiving Coil cartridge with ECC88
April 25, 2010

A very good circuit of pre-preamplifier, for amplification of signals from heads of Moving Coil. It uses the two departments of tube ECC88, association parallel, for reduction of produced noise. [more]

Tel Protection Filter
Tel Protection Filter
April 25, 2010

It is a simple circuit of protection of telephone line from hypertensions. Placed in line and before the telephone appliance. [more]

ADSL Filter for Tel Line
ADSL Filter for Tel Line
April 25, 2010

It ιs a simple circuit for the noise reject that exists in the telephone line in ADSL connections. It works in PSTN and ISDN lines, and is placed in line and before the telephone appliance. [more]

Spy for Telephone Line
Spy for Telephone Line
April 25, 2010

Spy for Telephone Line [more]

Telephone Line Ring and Indicator
Telephone Line Ring and Indicator
April 25, 2010

It is a relatively simple circuit, with which we can have optical and sound clue, when we have telephone ring in the line of telephone. The calls in the line, are changed in pulses of... [more]



pages:

Subscribe