$5 VGA for Raspberry Pi

Hackaday.io user [mincepi] wanted a VGA output on his Raspberry Pi Zero. His quest led him to design a PCB that mates with a VGA monitor and the Pi board and–according to his estimates–costs about $3.62 each (although to get that price, you have to build three).

The VGA hack uses the Pi’s built-in port for driving a VGA (the vga666 by [Gert]) that we’ve covered before. Keeping in the spirit of the Zero, though, [mincepi] stripped the external components to a minimum. He uses fewer bits, so there is less color resolution. He uses cheaper 5% resistors and solders them directly between the Pi and the VGA board to save a connector (see below). He uses a male connector with the middle pins removed, so it straddles the PCB and plugs into the monitor directly.

pivgaint

You can order the boards from OSHPark, or you can make boards yourself. There are even instructions for recycling old VGA cables for connectors if you don’t want to buy new ones. Don’t worry about the rumors that VGA is dead. Vinyl records and tube amplifiers were dead too for a long time, but they still manage to hang in there year after year.

This project, by the way, was an entry for the Raspberry Pi Zero contest.


Raspberry_Pi_LogoSmall

The Raspberry Pi Zero contest is presented by Hackaday and Adafruit. Prizes include Raspberry Pi Zeros from Adafruit and gift cards to The Hackaday Store!
See All the Entries || Enter Your Project Now!

49 thoughts on “$5 VGA for Raspberry Pi

    1. Unlike tubes and records (which have a niche following and audible differences to transistors and digital music), VGA is dead like LPT is dead. There is no reason for it to come back. This type of project happens because someone still has some old monitors, and the computer is cheaper than the display. Aside from refurbishing old tech, VGA will not be making a come back.

      1. I predict CRT monitors will come back just like vinyl did and some kid who isn’t even born yet will be going on about the wonder of phosphor persistence and the green shade you can’t get with a graphene flex display…. Just sayin’

        1. Doubt that will occur with all the environmental hazards that go along with CRTs. The only way I see that is because they will probably be laying around in some old shed or building because it’s such a pain for anyone to take them off you hands for disposal.

          1. VGA isn’t only useful for CRT displays. I have a few Dell LCD displays from the mid 2000s that only have VGA inputs. They are perfectly capable displays with no dead pixels or scratches, and this is a great way to get some use out of them.

      2. Tell the 6000+ servers in the datacenters I look after in Tokyo about VGA being dead..
        Every single server (including all the new ones coming in, even mew models) has VGA out only with no HDMI, DVI or Displayport in sight.

        Just because consumer motherboards don’t use it, doesn’t mean it’s dead.

  1. This is nice, I was looking into something similar to use some of the spare VGA monitors I have kicking around. Best thing I found was a twelve dolla board on Dealsxtreme. But this is better, smaller, and I can build it myself. This Pi Zero contest is really brining out some good shit. My entry pales in comparison, lol

        1. Yes, if you don’t mind losing the GPIO and if 6 bit video is acceptable for the application. Otherwise, just wire up +5V from the GPIO to the converter, and you’re probably golden. I’m just saying that there are other solutions to look at, not that this one doesn’t have its value.

  2. With the 2 PWM channels and a capacitor on the GPIOs, a higher color resolution could possibly be obtained.
    I believe a 3 control block DMA would do, the first two blocks would use no DRQs, while the third would be paced by a DRQ, set to the serialiser or clock modes.
    The first block would update the PWM register, and the 2nd and 3rd would control the GPIOs, one for GPIO clear, and the other for GPIO set.
    With this you could only have 2 of the RGB channels at once at a higher precision, the 3rd would be limited to the lower resolution DAC.

  3. I hate to be that guy, but a turnkey adapter is less than $6 on Ebay, and the ones I use work fine, so the money argument is a little thin.

    (Yes, I realize that the fun is in the design, building and tinkering)

    1. I was aware of the $6 adapters before I started.

      This project is actually part of a larger one to reduce the cost of a computer to the absolute minimum. The idea was sparked by a comment by a high-school coding teacher that the Zero was cheap enough to give to one to each student. Of course it isn’t usable without a bunch of accessories. And some students can’t afford much, so a few dollars matter.

      I’m hoping to use Rpi WiFi project (also submitted to the contest) to get WiFi without using the USB port. Then I can use a PS/2 keyboard and USB mouse to finish it off.

      1. I think it’s a great project, Everyone has reasons for doing things that others wouldn’t find useful. That is what hacking is all about. Making things do what you want, Not what others think is good or useful.

      1. I’ve bought a $2.61 active one from ebay. Just waiting for it to arrive from HK. Specifically for using on the PI. I don’t have the time to do the VGA resistor hack when the alternative is so cheap, but I respect the project goals. The custom driver is a shame, but giving something back for legacy is nice. A zero with this would be great as there are so many cheap & free older LCD monitors around. 14″ 1024×768 can be found all day long in the right places.

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