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Tools and measuring circuit diagrams
June 22, 2010
This design offers a way to trace resistance in the milliohm range, right to a short between bridged traces beneath a solder mask. [more]
April 23, 2010
The design shown will test PNP and NPN transistors, diodes and SCRs both "in-situ" (equipment of course de-energised) and also by direct connection to a stand-alone component. It is a simple GO/NOGO test which can... [more]
April 23, 2010
This circuit is a frequency meter, low cost. [more]
April 23, 2010
Even if the digital multimeters have dominated in a lot of applications, in the measurement, exist the need for existence of instruments of clue in various appliances, voltage and current, as in power supply or... [more]
April 23, 2010
The MOSFET input of the CA3140 makes it ideally suited for use in a high impedance DC voltmeter. Switch S1 is the range selector. The input impedance is limited to 10M by the resistors used... [more]
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