New build with recycled parts on a ridiculous budget 120cm*60cm work area

[Clive S]

There was no documentation with my quality £3.30 (Delivered) BOB from China lol I found the pinout online for an identical board.

https://warp9td.com/images/BOB_Vendo...line/ST-V2.pdf

I have tried to tight ass my build but only semi successfully lol.

For those that are interested I can confirm that the bob in question does need both 5V and 12-24v to get it to work.

Also when say 12v is applied I can also confirm that the input pins are pulled high so that a simple switch to ground will be fine.

[Desertboy]

For those that are interested I can confirm that the bob in question does need both 5V and 12-24v to get it to work.

Also when say 12v is applied I can also confirm that the input pins are pulled high so that a simple switch to ground will be fine.

You are THE MAN!!!

[Neale]

For those that are interested I can confirm that the bob in question does need both 5V and 12-24v to get it to work.

Also when say 12v is applied I can also confirm that the input pins are pulled high so that a simple switch to ground will be fine.

Clive - the doc says "12-24V optional". I'm pretty sure that I've seen someone else talking about a similar BOB where 5V supplied the board but there was no analogue out without the extra supply. But it could have an internal regulator supplying 5V if you do use the higher-voltage supply, I guess. Docs on this Chinese stuff are a nightmare! Personally, I'd start with the 5V connected to the +5V terminal and begin testing. My first BOB was a ZP5A which was broadly similar but no analogue out, so haven't played with the one in question. OP has 5V and 12V available so at least it won't mean an extra PSU either way.

[Clive S]

Clive - the doc says "12-24V optional". I'm pretty sure that I've seen someone else talking about a similar BOB where 5V supplied the board but there was no analogue out without the extra supply. But it could have an internal regulator supplying 5V if you do use the higher-voltage supply, I guess. Docs on this Chinese stuff are a nightmare! Personally, I'd start with the 5V connected to the +5V terminal and begin testing. My first BOB was a ZP5A which was broadly similar but no analogue out, so haven't played with the one in question. OP has 5V and 12V available so at least it won't mean an extra PSU either way.

Hi Neale I have one of these bobs that I have been playing with linuxcnc and mpg's It fooled me at first. but I have just fired the bob up from a usb port for the 5V result nothing on the input pins. then I applied the 12-24v and hey presto volts on the input pins.

edit: there is a red led, lit when the 12-24v is applied it is next to the input pins

[Neale]

I bow to your better knowledge - and the result of a straightforward experiment! Doesn't chime with the documentation or expectation, but if that's the way it works, then that's the way it works. Go to it, Desertboy, and do it Clive's way! I think that we're on the same page re input switches, though - connect between input pin and ground.

[Clive S]

I bow to your better knowledge - and the result of a straightforward experiment! Doesn't chime with the documentation or expectation, but if that's the way it works, then that's the way it works. Go to it, Desertboy, and do it Clive's way! I think that we're on the same page re input switches, though - connect between input pin and ground.

Neale I am an old fart now. I worked on the good old day of valves. So from what I had read on the forum you outclass me by miles

I spent hours some time ago with this card and thought as you did that the 12-24v was just for the 0-10v stuff. But there may be more than one version of the bob. Happy days.

[Desertboy]

Rather than old fart I think the terms experienced and seasoned are more suitable now I've turned 40 lol, when I was 20 then yes old fart.

[Neale]

Nah, you're still a Bright Young Thing!