Home Made Digital Tachometer for my Car with Gear Shift Warning LED

eronfx

Active member
  • Jul 4, 2007
    1,998
    22
    38
    Maharagama
    Mamath issara eka eka ewwa heduwa, thaniyama nanang circuit ekak design karanda be , owa kohenda ganda thiyenne, lankawe thiyena baduth ekka hadanda puluwan curcuits thiyenawanang denawada, photo cell kiyala device ekak ahala thiyenawada, lankawe thiyeida hoyaganda?
     

    pasanlaksiri

    Member
    Aug 22, 2006
    4,179
    0
    0
    Thalawathugoda
    eronfx said:
    Mamath issara eka eka ewwa heduwa, thaniyama nanang circuit ekak design karanda be , owa kohenda ganda thiyenne, lankawe thiyena baduth ekka hadanda puluwan curcuits thiyenawanang denawada, photo cell kiyala device ekak ahala thiyenawada, lankawe thiyeida hoyaganda?

    Actually what is ur application. Photodiodes r much faster than Phototransistors.

    Normal resistor type photo cells nam oona tharam hv machan.