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it is working very well since i plugged the heat sink on 7805 regulator..
no more heating at all.. thanks,
mvs sarma.. i would like to do that but i've already bought some 5V relays.. and my supply is 12V ..
Joe S. - yes, that is what i have done.. i've used four bc337 transistors to switch the relays...
Sylvio
Last edited by sirvo; - 9th February 2007 at 01:20.
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Hi, what if? you canadd a resistor series to the coil to limit the current, or you can use the transistor in emitter foller mode where the volage at emitter is less than the voltage at base.Originally Posted by sirvo
it is working very well since i plugged the heat sink on 7805 regulator..
no more heating at all.. thanks,
mvs sarma.. i would like to do that but i've already bought some 5V relays.. and my supply is 12V ..
Joe S. - yes, that is what i have done.. i've used four bc337 transistors to switch the relays...
Sylvio
Regards,
Sarma
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Hi, Sarma
V. Good idea ...
If you use a series resistor AND a capacitor between resistor and ground ( say 100 to 470 µF ) you will have enough energy to power up the relay ... and the resistor will limit the quiescent current ...
Alain
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Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
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IF there is the word "Problem" in your question ...
certainly the answer is " RTFM " or " RTFDataSheet " !!!
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sarma.. yes, it was a possibility.. but now it's done.. thank you for giving solutions... next time i'll use this information..
Sylvio
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