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??? 12/28/08 21:05 Read: times	#161193 - use PNP at the high side Responding to: ???'s previous message

List of 40 messages in thread

Topic	Author	Date
Help with 4 digit LED 7 segment display		01/01/70 00:00
common cathode		01/01/70 00:00
Maybe it is a standard display		01/01/70 00:00
It's standard, but I can't find a spec sheet		01/01/70 00:00
an old-time part, perhaps?		01/01/70 00:00
The 8650 is a standard alarm clock IC		01/01/70 00:00
add up the forward voltages, adjust the resistors ...		01/01/70 00:00
Diagram		01/01/70 00:00
It's all up to you ...		01/01/70 00:00
Too soon to start worrying about voltage		01/01/70 00:00
Be careful ... you only have one of these ... right?		01/01/70 00:00
beware		01/01/70 00:00
Interesting concept		01/01/70 00:00
Don't think so		01/01/70 00:00
make a FULL schematic		01/01/70 00:00
Of course		01/01/70 00:00
Careful, now!		01/01/70 00:00
Diagram mis-labeled, sorry		01/01/70 00:00
Please consider that....		01/01/70 00:00
Lookup table		01/01/70 00:00
'Ohm" it out		01/01/70 00:00
I don't see how		01/01/70 00:00
then forget transistors		01/01/70 00:00
2-Anode 12-Cathode Drive Diagram		01/01/70 00:00
Thanks		01/01/70 00:00
It works like this....		01/01/70 00:00
Vbe, not Vce		01/01/70 00:00
that was probably I who did that ... and you're right		01/01/70 00:00
Well...		01/01/70 00:00
take a close look		01/01/70 00:00
I doubt it		01/01/70 00:00
Possibly a radio section too		01/01/70 00:00
Crystals		01/01/70 00:00
That C### is a capacitor number, I think		01/01/70 00:00
How about this?		01/01/70 00:00
use PNP at the high side		01/01/70 00:00
...And get rid of the extra resistor in the...		01/01/70 00:00
Thanks. Time to test and draw		01/01/70 00:00
multimeter solution		01/01/70 00:00
Similar to what I did		01/01/70 00:00

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