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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Recent content by yusim

  1. Y

    Simple Diode question....

    i used this on an application a couple of years back - i got the idea from the PIC Tips n Tricks application note that can be found here - 8-bit Microcontroller Tips n' Tricks
  2. Y

    1.024 Voltage Reference for LM35

    i dont know how you change the resolution of the lm35 with a voltage referance but if you can - most pics have built in Vref module in mid range PICs the Vref ranges from 0.21v - 3.59v (using a 5v power source) as seen here :mid range voltage reference module you also must buffer the Vref output
  3. Y

    short circuit current question..

    then whats the value of the horizontal resistor connected to the ground node? - according to the calculations under the circuit its value is 10Ω the value of the 10Ω resistor for one :)
  4. Y

    short circuit current question..

    you state that between the green dot (9v) and red dot (V2) there is a 9v drop - if that was the case then V2 = 0 which would mean that there's no current through the 10Ω resistor which could not be the case because the current sources current has to go somewhere - so there is clearly not a 9v...
  5. Y

    CRT color TV loose its actual Color

    safety precautions! CRT displays can store thousands of volts even when it not plugged in! Make sure to discharge all capacitors within reach before you do that do not touch the board with 2 hands so as not to complete a circuit with your heart! do not open your CRT until you are...
  6. Y

    ful progrm

    nice, what does the program do? :)
  7. Y

    Guitar Parts(First thread)

    there are quite websites and forums dedicated to diy guitar effects - search for "guitar effects schematics" or "guitar effects circuits" and heres a link to start you off: Guitar Effects Schematics & Projects
  8. Y

    VGA, Composite, TFT

    here's a great place to find info on creating composite video signals using microcontrollers: **broken link removed**
  9. Y

    Finding R equal in circuit

    ok i dont know what an inside/outside network is so if i was givin this problem id just do a bunch of y -> delta/ delta -> y conversions to get the answer
  10. Y

    555 timer as a bistable multivibrator

    just google i searched google for "555 bistable circuit" this is the first hit: The 555 Bistable Circuit - Electronics in Meccano
  11. Y

    can someone help me figure out this ciruit?

    wow thank you very much audioguru and Electronworks, i now understand completely audioguru said: i actually built this circuit the way i posted it and it works fine - i guess the amount of light that gets through the finger must change only slightly thanks again for your great replies yusim
  12. Y

    can someone help me figure out this ciruit?

    thanks mel8030 for the reply :) im having some trouble understanding your answer - what do you mean by "The capacitor feeds the change" ? could you please elaborate thanks, yusim
  13. Y

    Boosting output to run LED's

    you can use a transistor PICs can usually source about 25mA per port which should be enough to light a LED if its not enough, like you said you can use transistor as a switch in which case the current would be limited only by the power sources current limit
  14. Y

    can someone help me figure out this ciruit?

    hi all this isnt realy a homework ques. but im trying to undersatnd how this circuit works so i figured this is the best place for this post. i built myself a heart rate monitor that i found **broken link removed** i had to add a bandpass filter to get the results that they got on the...
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