Yes, I do realize that, from a current capability standpoint, the circuit doesn't make much sense. However, the OP seemed to want to know how to use a 555 with a PNP transistor, and the 2N3906 was the first one I found in my parts tray.Tracecom, you've used a 2N3906 in an emitter follower configuration, and the part number shows you're using a bjt 555 timer. Were you aware that the 2N3906 is designed for up to 100mA of collector current, whereas the output of the bjt 555 timer is rated for sourcing or sinking up to 200mA?
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