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prototype bootup problems

https://www.esp8266.com/viewtopic.php?f=13&t=6239

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Re: prototype bootup problems

PostPosted: Fri May 07, 2021 9:08 am
by Bee Gee
Reiterating for completeness, post #32540 has a link for calculating the resistors and choosing the PNP's:

NPN Transistor Maximum Collector Current Ic
PN2222 600-mA DC
2N2222 800-mA DC
MPSA13/MPSA14 500-mA DC
2N3904/2N3903 200-mA DC

Re: prototype bootup problems

PostPosted: Fri May 07, 2021 2:43 pm
by martinayotte
Those schematics are wrong, according to transistor arrow, they are NPN, so not wired correctly ...
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