When I plug it into a multimeter’s hFE slot for E-B-C I get a reading of 140 hFE, when I plug it into the B-C-E slot I get a quick 1600 hFE, and then just a 1 in the far left digit of the screen almost like a processing/measuring reading, like what the multimeter does when you measure V and you first put it on the V source.
Sent from my iPhone > On Feb 9, 2019, at 13:10, GastonP <ghpic...@gmail.com> wrote: > > Did you verify that you verified that the layout is E-B-C? Or is it B-C-E? > >> On Friday, February 8, 2019 at 9:35:14 PM UTC-3, Thomas Kummer wrote: >> My understanding is that a MPSA42 is an NPN transistor and the MPSA92 is a >> PNP. My understanding of how an NPN transistor works is that when the base >> “P” is turned on the circuit from collector to emitter is shorted. When the >> base is off the circuit is open. I’m trying to use the decimal point on a >> Nixie tube rather than an LED for the alarm. So, I have the collector hooked >> to the tube the emitter hooked to the ground, and the base hooked to 5V >> signal, I also have a 10K resistor between base and 5V. However, no matter >> what the decimal point stays lit!! Even when the signal is off. The only >> time it isn’t lit is if the base is open, if I even touch the base the >> decimal point lights up!! The transistor has the the imprint A42 B331. It >> appears to be a knock off and that could be where my problems are coming >> from. I’ve tried looking for a datasheet, but to no avail. Any help would be >> appreciated. > > -- > You received this message because you are subscribed to a topic in the Google > Groups "neonixie-l" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/neonixie-l/Co4-e9YYLQo/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > neonixie-l+unsubscr...@googlegroups.com. > To post to this group, send email to neonixie-l@googlegroups.com. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/547f3d40-7c96-42a2-9306-b745f558b3a0%40googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/703B9D39-CAE5-4E80-BFEF-4BF38733C7ED%40gmail.com. For more options, visit https://groups.google.com/d/optout.
