dnmeid
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Activity overview
Latest activity by dnmeid-
dnmeid commented,
I have had a chance to investigate this and have found that the BLPWM pin is in fact a no connect, and is incorrectly labeled in the specification. Oh really, what a pity. Why didn't you at least...
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dnmeid commented,
And another backlight question to Newhaven (I hope somebody from Newhaven kicks in soon!):according to the datasheet the 8 LEDs of the backlight are parallel. In the shown circuit I don't see inter...
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dnmeid commented,
Investigating the topic a little more now I definitely think the BLPWM pin only makes sense when it is internally connected to the PWM_OUT pin of the HX3869-A02.This would mean it gives the PWM sig...
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dnmeid commented,
Hi,I don't have the mentioned display here, but yes you have to connect LED- and LED+. These pins are for the backlight. The display should work without powering the LEDs but it will be very hard t...
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dnmeid commented,
My guess is that the whole purpose is to reduce the average ON time per second of the LCD. This in turn affects its overall brightness. Whether that's done via duty cycle or frequency in theory ...
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dnmeid commented,
MT5555, while I still have not an answer to my original question, I just want to make sure that you are trying to adjust the pulse width of the PWM, not the PWM frequency. The PWM frequency should ...
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dnmeid created a post,
NHD-4.3-480800EF-CTXP backlight
Hello,we want to use the mentioned display but I'm not exactly sure how to design the supply for the backlight.The datasheet shows eight LEDs in parallel between pins 2 and 3 and a PWM input on pin...