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Type: Posts; User: sabahan

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    [SOLVED]Closed: PIC16F877A TQFP Pinout

    137734
    137735

    I found two version of the TQFP package for the PIC16F877A,which one is the correct one?
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    Closed: Re: Insulating glove from tube amp building

    Well,I think the video is misleading me,Thank you
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    Closed: Insulating glove from tube amp building

    I saw in YouTube that some have wearing glove for safety issue to protect from electrical shock,it looks like linens,I had purchased few but are are thick rubber of leather glove which is mostly for...
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    Closed: Re: Electrytic Capacitor and Ceramic capacitor

    Yes,the working voltage is 12VDC,from a SLA battery,here are no alternating wave form from the circuit,all are DC operation,the circuit is to control a set of 12V LED light that I'm planning to...
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    Closed: Re: Electrytic Capacitor and Ceramic capacitor

    This is the capacitor I ordered from RS components
    http://my.rs-online.com/web/p/ceramic-multilayer-capacitors/7900610/
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    Closed: Re: Electrytic Capacitor and Ceramic capacitor

    I'm using a Digimess HUC3100 LCR meter to measure both the capacitor and the resistors,all component are ordered from RS components,which I believe it should be in its stated tolerance ,even if the...
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    Closed: Re: Electrytic Capacitor and Ceramic capacitor

    Sorry I had forgotten to mention,both capacitor capacitance are the same ,value of 10uF with a voltage rating of 10uF,except that the ceramics is a non polarized 50V capacitor and the electrolytic...
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    Closed: Electrytic Capacitor and Ceramic capacitor

    I uses a 10uF electrolytic capacitor on a bread boar to test the circuit,the diagram shows part of the circuit with act as a timer circuit when the opamp goes high,when voltage from the charging...
  9. Closed: Re: I need a isolation Variac,can this works

    Yes I know,I can't find a 230 to 230 transformer with large enough power for my need
  10. Closed: I need a isolation Variac,can this works

    I need a isolated Variac but can't find it locally,I can only find normal variac that are not isolated from the main,can I couple two transformer of primary 230,secondary 115 together and the variac...
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    Closed: Re: Current Mirror experiment

    I would like to add a constant current sink to my next amplifier project,current mirror seems to be a good choice,but I have no experience on this,so doing some experiment and try to familiar with it...
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    Closed: Current Mirror experiment

    121940

    I did a current mirror experiment with the simple setup,both Q1 and Q2 are MPSA42,the result are satisfying

    but when I connect another BJT to the setup,result are all ways off

    121941...
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    Closed: resistance of a constant current source

    I try to figure out how to I calculate the resistance of a constant current source,I am using a LED as a voltage reference to control the voltage,Iam tring to calculate the gain of a common emitter...
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