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Posts tagged 555

Digitouch Switcher Circuit Diagram

Automatic Switcher Circuit Diagram using 555, IRF540

Build magnifying transmitter

Build magnifying transmitter circuit

need schematic diagram RCA ac/dc TV set, model E09304WH, chassis TX825NC. AC power supply resistors burned up.

Bernie H asked: The model no. and chassis no. are on the back of the set, not on the remote. Date of manufacture Oct. 1995. Small portable TV set 115v./12v for RV use. Works ok on 12 volts, 3 or 4 resistors in 115v circuit fried.

Making DIRECT PCB PLOTTING

This article is about another method I tried and had 100% success first time. The object is to modify an old plotter pen so that you can draw direct onto the PCB material itself. No photography, just a new pen. All you have to do is the use one of those Faber Castell S overhead […]

Control input lines On off Switching circuit diagram

Control input lines On off Switching circuit diagram using 4011, 4518, 4066, BAT42, VNB8AF

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