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Electronic Siren
Electronic Siren
April 14, 2010

With this circuit we can create a altered sound of siren. [more]

Electronic Switch ON-OFF touch or with push button
Electronic Switch ON-OFF touch or with push button
April 14, 2010

Here we have three choices, with which we can make electronic switches that use our touch or pressing (push button). [more]

Digital Ping - Pong
Digital Ping - Pong
April 14, 2010

This circuit is a double direction flash. Similar to Digital Ping- Pong 1, there is a movement of a lit dot, up and down along the LED's length. [more]

Digital Ping-Pong
Digital Ping-Pong
April 14, 2010

This circuit us gives the sense of movement of ball up down, after the LED turn on successively the one afterwards the other. As soon as it reaches in the one or in the other... [more]

Frequency Multiplier X100 with Noise Rejection for low frequency
Frequency Multiplier X100 with Noise Rejection for low frequency
April 14, 2010

The measurement of signals of low frequency is enough difficult in enough cases. Most meters of frequency have specifications, for measurement of frequency until 50 HZ or 100HZ and the depiction, if they are drive... [more]

Programmable Frequency Divider with 7490
Programmable Frequency Divider with 7490
April 14, 2010

This circuit will divide the frequency of a TTL compatible square wave signal by a factor from 0 to 999. [more]

SamClock Ringer
SamClock Ringer
April 14, 2010

The SamClock RINGER, constitutes natural extension of digital clock SamClock. [more]

SamGordon Digital Clock
SamGordon Digital Clock
April 14, 2010

SamGordon Digital Clock [more]

ADSL Filter for Tel Line
ADSL Filter for Tel Line
April 14, 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]

Discharge Indicator for 12V Battery (Lead Acid)
Discharge Indicator for 12V Battery (Lead Acid)
April 14, 2010

This circuit makes the work, this detection of discharge, protecting the batteries from destruction. At the discharge the polar voltage of batteries 12V of Lead acid, is not allowed it is decreased under 10.8V, thus... [more]



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