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by robbaz
Fri Sep 22, 2017 8:06 am
Forum: Other projects
Topic: Modifying a 3.5" car display for USB power.
Replies: 453
Views: 225141

Re: Modifying a 3.5" car display for USB power.

Yay, destruction time! :D Have you any tip about how to disconnect only those pins on this tiny component (other than probably phisically remove them forever with a cutter)? Searching on another forums I also found this thread where a user suggested to completely remove the chip and connect 5V dire...
by robbaz
Thu Sep 21, 2017 5:08 pm
Forum: Other projects
Topic: Modifying a 3.5" car display for USB power.
Replies: 453
Views: 225141

Re: Modifying a 3.5" car display for USB power.

Pin 1: 7.18 (was 6.2V) (Vout?) Pin 2: Gnd (Gnd) Pin 3: 0.78 (was 0.8V) Pin 4: 20.2V (was 9.7V) Pin 5: 23.7 (was 12V) (Vin) Pin 6: 2.98 (was 2.7V) (FB?) Not that there was any doubt but Pin 5 is confirmed to be Vin. Pin 1: Vout? Pin 2: Gnd Pin 3: Pin 4: Enable Pin 5: Vin Pin 6: FB? I'm pretty sure t...
by robbaz
Wed Sep 20, 2017 6:16 pm
Forum: Other projects
Topic: Modifying a 3.5" car display for USB power.
Replies: 453
Views: 225141

Re: Modifying a 3.5" car display for USB power.

I would suggest feeding the board with a reduced voltage and seeing how the voltages change, try 9V if you can. Hi BMS Doug, at the moment I don't have a 9V DC supply reliable at home so I tried with an higher voltage, 24.4V. I hope this will help anyway! These are my measurements: Pin1: 7.18V Pin2...
by robbaz
Sat Sep 16, 2017 2:05 pm
Forum: Other projects
Topic: Modifying a 3.5" car display for USB power.
Replies: 453
Views: 225141

Re: Modifying a 3.5" car display for USB power.

Hi guys, I got the same BW screen board and I tried to check the two 6-pinned chips looking for the voltage regulator as BMS Doug said. I searched online for their datasheets without success. One is labeled as O26B3 and the other as JWBV 795D. I think that the second one is the voltage regulator. I ...

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