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by wolfchild
Wed Jun 01, 2016 6:17 pm
Forum: General discussion
Topic: Turning off HDMI backlight
Replies: 21
Views: 5810

Re: Turning off HDMI backlight

Will this transistor do? http://www.alldatasheet.com/datasheet-pdf/pdf/170796/STMICROELECTRONICS/B772.html Yes, but it's probably oversized as the backlight current is only about 85mA. A correctly driven BC807 would work wonders http://www.nxp.com/documents/data_sheet/BC807_BC807W_BC327.pdf A coupl...
by wolfchild
Mon May 30, 2016 11:06 am
Forum: General discussion
Topic: Turning off HDMI backlight
Replies: 21
Views: 5810

Re: Turning off HDMI backlight

The simplest solution is to shunt that LCD's backlight on/off switch with a reed switch. Solder the reed switch across the switch terminals and put the backlight switch in the OFF position. The switch has six pins, but if you look closely you'll see that only two have actual PCB tracks connected to ...
by wolfchild
Sat May 21, 2016 9:01 am
Forum: General discussion
Topic: Learning a New Programming Language
Replies: 40
Views: 5995

Re: New Programming Language

Lots of good advice and diverse opinions. JavaScript is definitely a wise choice. Some additional advice (coming from someone who for the last 18 years has been earning a living writing software) is to learn well 2 languages. Learn a compiled language and an interpreted language. Get comfortable wit...
by wolfchild
Thu May 19, 2016 2:22 pm
Forum: General discussion
Topic: 5 inch HDMI Display stuff
Replies: 33
Views: 5329

Re: 5 inch HDMI Display stuff

Thanks! How many amps does the power supply unit you used provide I'm currently using a 2.1A supply from seeedstudio. It's used to power: RPi 2B overclocked to 1GHz; 5" LCD with resistive touch screen; USB WiFi dongle; USB wireless keyboard dongle. Occasionally I do get the low voltage indicator sq...
by wolfchild
Wed May 11, 2016 11:35 am
Forum: General discussion
Topic: 5 inch HDMI Display stuff
Replies: 33
Views: 5329

Re: 5 inch HDMI Display stuff

I have that display and it mounts in piggyback fashion on the Raspberry Pi GPIO header, resulting in a sandwich like assembly. The display has a micro USB connector for power which you may use to power it all up. You can therefore apply power either from the RPi or from the LCD. The power is transfe...

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