PicoMite VGA check


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robert.rozee
Guru

Joined: 31/12/2012
Location: New Zealand
Posts: 1987
Posted: 01:43pm 19 Jan 2022      

  Mixtel90 said  The BAT41 has a Vf of about 700mV at 10mA though


oops, i should have selected the BAT42:
https://www.vishay.com/docs/85660/bat42.pdf

that will get us back to a maximum Vf of 400mV @ 10mA. it does look like there are better choices for the NPN transistor, and i could have used a much lower base resistor to help things along too. i'll let others experiment as i'm not using the VGA version myself.


cheers,
rob   :-)
Edited 2022-01-19 23:45 by robert.rozee