No. As what I post on thread #118, I measured 80mA for 14 leds. But the brightness is quite dim. Do you know why?The led brightens is exactly the same when it has the same current no matter how it is placed.
Your previous test was with 40mA which was shared in the two leds that were in parallel so how do you compare the brightness of that to the brightness of 80mA for one led
Noted.Maybe i can help.
post 118 show u getting 80ma...right ?..now if u know ohms law the total 80ma is divided in 2 leds led 13 and led 14
so each led gets approximately 40 ma.
now on post # 120 you put 80ma in one led and got more brightness so now u should understand whats your problem.
The first is better because in some cases if one led goes "lazy" in dimmer the other in parallel may compensate for it allowing a slight rise in its voltage . in the lower diag. a faulty led may reduce the overall voltage for all the rest in series.
this matter needs further research .
TPIC6C595 to control the brightness. IS this true ?
yes
yes start from 50% -100%
remind me why u using shift register... why not use the mcu port directly or use simple uln series drivers?
https://www.circuitvalley.com/2012/02/pic16f917pic16f1907-7segmentlcddriverex.html
What r u savings the mcu pins for ?
working serial is more difficult give us the whole picture.
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