Thread: MPGuino not timing out / backlight stays on
View Single Post
Old 02-24-2015, 04:52 PM   #4 (permalink)
AndrzejM
Master EcoModder
 
AndrzejM's Avatar
 
Join Date: Oct 2011
Location: Poland
Posts: 840

Berta - '97 BMW 318 tds Compact
90 day: 62.03 mpg (US)

Charlie - '07 Citroen C4 Grand Picasso Exclusive
90 day: 37.58 mpg (US)

Corsa - '05 Opel Corsa C
90 day: 53.22 mpg (US)

Mruczek - '03 Audi A2
90 day: 60.61 mpg (US)
Thanks: 185
Thanked 167 Times in 117 Posts
I know what's the issue there... You've used PNP transistor instead of NPN transistor to take care of the LCD backlight (or the other way around NPN instead of PNP - depends on the LCD setup). Switch to similar transistor but of different type and your problem will disappear.

Good luck!
__________________


Quote:
Gerhard Plattner: "The best attitude is to consider fuel saving a kind of sport. Everybody who has enough money for a strong car, can drive fast and hit the pedal. But saving fuel requires concentration, self-control and cleverness. It's a challenge with the nice effect of saving you money that you can use for other more important things."
  Reply With Quote
The Following User Says Thank You to AndrzejM For This Useful Post:
firehawk618 (04-02-2015)