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CGS Pulse Divider transistor question
MUFF WIGGLER Forum Index -> Music Tech DIY  
Author CGS Pulse Divider transistor question
Leisure Cove
I am populating a CGS Pulse Divider board and have a question:

Two of the transistors in the circuit are BC557, and the remaining transistors are BC547. There is no indication on the silkscreen side as to which transistors go where (as there is for the resistors, caps and ICs).

Can anyone point me in the right direction-- in particular, where should I insert the BC557s?

Thanks!
Leisure Cove
(this is the Rev 1.2 board-- the most recent edition)
fluxmonkey
the bc547s are NPN; their symbol has the arrow on the emitter pointing outward. the BC557s are PNP, their symbol has the arrow pointing in.

b
Leisure Cove
Yes! Thanks!! thumbs up
zthee
PNP = Pointing iN Proudly
NPN = Not Point iN

wink
Tim Stinchcombe
zthee wrote:
PNP = Pointing iN Proudly
Very similar to the mnemonic I use: PNP = Point iN Plate - read it in a magazine years ago, and it has stayed with me ever since, and served me well!

Tim
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