Author Topic: Howto: simple Differential Amp + TTL ?  (Read 109383 times)

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Offline Xer0

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Re: Howto: simple Differential Amp + TTL ?
« Reply #120 on: February 26, 2010, 08:38:38 pm »
Mhh i hope it will. i soldered almost anything on the board already, now its one of the last things that have to be connected. if i can switch, i just to straight from the legs of the 100ohm resistors to the socket header. otherwsie, i have so put a wirte around or between the legs. not that difficult, but uncomfortable ^^

// mh and i have to get 2 quadjumpers too. to switch x and y when needed ;)

Offline James

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Re: Howto: simple Differential Amp + TTL ?
« Reply #121 on: February 26, 2010, 08:46:24 pm »
If you have a correction amp that works in one phase, then flipping the phase of a wave, or individual channels within it, is possible in LaserBoy.

There is a lot of neat stuff to learn about all of this by using the LaserBoy application.

James.  :)
« Last Edit: February 26, 2010, 08:48:27 pm by James »
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Offline meandean

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Re: Howto: simple Differential Amp + TTL ?
« Reply #122 on: February 26, 2010, 09:49:05 pm »
  If your projector inputs are really differential, (you can verify this by taking an ohmmeter between the '-' inputs to
make sure they are not tied together, and that looks like the case from the specs you posted), than you can wire however
you want.
"Patience is for the dead."

Offline Xer0

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Re: Howto: simple Differential Amp + TTL ?
« Reply #123 on: March 07, 2010, 07:19:40 pm »
Mhh strange. is'nt working still. Singals are right, connectors are right. But ist dont lase. Only when i plugged the Plug half in it startet to make a picture. but as soon as i put hte plug more in it stops. some kind of Short somewhere... and the Blankin ist wrong again. maybe i should stick with the "Out to +" connection i had on the Breadboard

Offline meandean

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Re: Howto: simple Differential Amp + TTL ?
« Reply #124 on: March 07, 2010, 11:02:17 pm »
  Sorry to hear that you are having so many problems (that's electronics!). I've been burnt a few times by male/female connectors that just didn't mate well (like trying to get pandas to breed). Keep at it, as we all want to know what that cheap projector can do.
"Patience is for the dead."

Offline James

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Re: Howto: simple Differential Amp + TTL ?
« Reply #125 on: March 08, 2010, 02:46:48 pm »
Please try the circuit that Dean designed, and I modified and suggested to you before.

You should have all the parts.

That would be a lot easier to help you with.

That is what I build for people and there are hundreds of variation on that circuit working for people all over the world.

James.  :)
« Last Edit: March 08, 2010, 02:49:09 pm by James »
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Offline Xer0

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Re: Howto: simple Differential Amp + TTL ?
« Reply #126 on: March 16, 2010, 09:40:38 am »
Hi. mhh i have lots o stuff to do for college now, but when i get time i will resolder the color outs to the positive ilda pins like it was bevore. that should fix it. all other stuff like x/y (with inverting jumpers, ftw!) and interlock port (can just jump it or connect a looongcat cable with a switch to it) is working like a charm.
besides: why noone ever used a Max232 to make +-10V from 5? its a fully integrated circuit and much cheaper than any dcdc stuff

 

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