[Arm-netbook] help needed with a ttl logic circuit

Dominique Dumont domi.dumont at free.fr
Sun Aug 23 19:24:08 BST 2015

On Sunday 23 August 2015 20:14:18 Dominique Dumont wrote:
> When the input is 0, the transistor emitter is driven to ~ 0.3V which
> should  switch off the transistor.

Even better, the emitter can be driven to 0 V bby putting the 100k resistor 
before the 10k. (attached png)

Hope this helps

 https://github.com/dod38fr/   -o- http://search.cpan.org/~ddumont/
http://ddumont.wordpress.com/  -o-   irc: dod at irc.debian.org
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