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| Frostillicus:
thanks - I picked up 2 transistors already - they are rated for 40V for 'collector-emitter', 40v for collector-base, but 5V for emitter-base. would this one work? It's pretty big(has a little heat sink connected to it). So if I use a separate power supply, should I connect the cathodes to both the powersupply negative and the gnd on the IPAC? |
| OSCAR:
Those transistors should work just fine. I would connect the cathodes to the power supply ground, and only pull the signal connections from the I-PAC like I did on mine. |
| Frostillicus:
--- Quote from: OSCAR on March 30, 2003, 02:29:01 pm ---Those transistors should work just fine. I would connect the cathodes to the power supply ground, and only pull the signal connections from the I-PAC like I did on mine. --- End quote --- I just have one last question - doesn't there need to be some return connection to the IPAC ? wait ...here I drew this(it's sloppy) out for one of the circuits: I know the symbols aren't right...but are the connections correct? |
| OSCAR:
That looks fine to me. The transistor is just looking for a signal on the base (it acts like a switch) so it will allow the current to flow from the emitter to the collector in the case of a PNP transistor. |
| Frostillicus:
cool - I just don't want to fry anything $$$ like my ipac4 :) Thanks for the help |
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