[sdiy] 4017 sequencer

[Scott Gravenhorst]

I have also seen schematics (few thankfully) that do not
have an arrow at all.  These have been simple things
like amplifiers where if you look at the topology, you
can tell collector from emitter.  You have to figure out
NPN from PNP by looking at the polarity of the biases
applied.  Not fun, but can be done.  (I have a guitar
amp book that has some like this.  I took a pencil and...)


Dave Magnuson <resfreq at hoohahrecords.com> wrote:
>At 03:59 PM 8/20/01 +0200, you wrote:
>>Was this the one? (attachment)
>>
>>The transistor is NPN you can tell by looking at the direction of the arrow.
>>Arrow pointing FROM the basis = NPN
>>Arrow pointing TO the basis = PNP
>
>
>A good way to remember:
>
>the emitter of an NPN is (N)ot-(P)ointing-i(N)
>
>Dave
>
>
>
>Resonant Frequency:
>resfreq at hoohahrecords.com
>http://www.hoohahrecords.com/resfreq/index.html

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