P Panos New Member May 20, 2013 #1 i built a 12V switch driven by Arduino and instead see 0V on the load when it is not driven i have abt 3.2 to 3.4 V (with no load). I use it to drive a 78L05 and i am not sure i need this voltage there when the circuit is open. Any suggestions? Thanks in advance Panos
i built a 12V switch driven by Arduino and instead see 0V on the load when it is not driven i have abt 3.2 to 3.4 V (with no load). I use it to drive a 78L05 and i am not sure i need this voltage there when the circuit is open. Any suggestions? Thanks in advance Panos
alec_t Well-Known Member Most Helpful Member May 20, 2013 #3 It should work ok if wired as in the schematic. Double-check the component connections.
K kubeek Well-Known Member Most Helpful Member May 20, 2013 #4 ..And correct orientation and type of the two transistors
P Panos New Member May 20, 2013 #5 ..thanks Kubeek, you are rigth on the point . PNP collector.. Thank you all. Its ok now. Panos