electronics circuit

Tag Archives: DIRECT

TTL RS232 driver circuit and Protect the PC from direct connection to hazardous voltages

By admin | Published: 11/20/2009
TTL RS232 driver circuit. TTL driver circuit consists of 2 transistors and a few other passive components, a negative voltage for RS232 logic generated by the capacitor C7. TTL to RS232 driver circuit and a variable voltage output driver has a parallel termination impedance to match cable and TTL driver circuit, and provides the best waveform. When driving [...]
Posted in Switches Diagram | Also tagged , , , , , , | Leave a comment

Making DIRECT PCB PLOTTING

By admin | Published: 11/12/2009
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 [...]
Posted in Electronic Circuit Design | Also tagged , | Leave a comment

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