Hello people, I was taking the standby cables, + 16v (which generates the IC1002), the + 38v and mass of the main of the Panasonic AKX36. * + 16v * POWER (between 2 and 3v) * + 38v (Then it stabilizes at 32.5v when turned on) *MASS I put a 7812 in series with the coil of a relay that is activated by the BC337. BC337 configuration Emitter to mass, collector to the negative of the relay and in the base I connect the pulse of power that are 2 ~ 3v by means of resistance of 1k. Problem: The emitter burns by melting its leg. Alternative with proven TIP41, results: TIP41C, when configured as the bc337, did not polarize the base of the TIP41 with the PowerON pulse. I tried disconnecting everything (transistor) from the PowerON pulse line and it was still at 0.3 ~ 0.6v. I didn't know why the voltage went down; I disconnected the positive from the relay and returned to normal. Details, the test with the TIP41 by giving powerON pulse I did without the current limiting resistance. My thought is the following: Why limit the base current if the maximum that will serve as a collector and emitter is the one that consumes the coil in series with the 7812 (70mA I measured it) In the protoboard this gives me a consumption (with the bc337) on the basis of 0.6mA nothing. Where is the problem? When I tried the bc337, the relay was activated and deactivated a couple of times, but I don't know why; Perhaps a positive terminal has been moved that was not welded but spliced by hand. See a problem? I have some questions: Did the case with Tip41 not work because it did not have the current limiting resistance? OBJECTIVE OF THE PROJECT: [b] Using the PowerON 2 ~ 3v pulse, activate a relay that powers the LM317 that generates the 16v (from the source 38) to inject it into the circuit used by the main that is originally generated by a PWM ( 54240) that some clues were damaged so I found this alternative to save the plate. [/B] Greetings and thanks

Now the BC337 is no longer mixed but the relay is not activated either. In the protoboard simulating the 3.12v pulse yes but here in the equipment with its 3.12v pulse no. Is it so fast that it doesn't give the relay time to move? Another thing was that I had to change the 7812 because when burning the previous bc337, I also burn the 7812. Now all are well, the components but I don't know what's going on