[Arm-netbook] help needed with a ttl logic circuit
domi.dumont at free.fr
Sun Aug 23 18:37:32 BST 2015
On Sunday 23 August 2015 15:52:27 Luke Kenneth Casson Leighton wrote:
> still don't feel completely happy (esp. with the schottky diode), i
> feel another transistor might be needed especially because VREFTTL
> (for the EOMA68_BOOT0 TTL level) could be *lower* than 3.3v.
There's no resistor to limit the current when ext_boot0 is up (from ext_boot0
But the schottky diode will prevent any current to go there... I don't see how
the first transistor can be switched on...
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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