Daviea
Permanently Banned - See: Ram Controls Forum Secti
Missile Command Trackball Encoder Boards and a SURPRISE!!
Undoubtedly, most of you know what this part is right away:
I'd like to ask for some help on this one. First, I'd like to find out WHAT the empty 14-pin IC spot is for. Yeah, yeah... I know... a 14-pin chip. dUh. No, I'd like to find out what exact part number was originally intended for this location. Next, I'd like to know if anyone has ANY documentation on this board which indicates the empty spots being used by any parts at all. Last, does anyone have spare work/non-working samples of these boards available that I can have? I'm looking for a nice spread of them which will show me examples of every possible radial encoder device (I am aware of at least five different versions) as well as different revisions of the PCB itself (There has to be at least the original NOREV and revs A through H).
Here's the deal. I just got some parts made which brings the encoder board (steering board) reproduction project as well as the 4.5" Maxi-Trackball project alive once again. Yes! Before I start assembling these boards, I want to make sure that there isn't any need for *fully* populated boards... perhaps for some old 70's driving game I am unaware of. So, if there ever was a fully populated version, I'd need to know what parts go in those empty spots.
And here's the surprise:
BRAND NEW radial encoders fresh made and tested. These are the first that passed my testing. The impossible task has been making the special housing that the optical devices are placed in. I have to take into account so many factors, including among other things, the IR-transmissive properties of the plastic being used. I may still go with a different type for the full production run, but these seem to offer the best performance while blocking stray ambient light.
So, there you have it. The first radial encoders made in a LONG time.
Yes, I will be making these available as a separate part so people can repair their own equipment.
Enjoy!! (oh, and thank you for any help/support you can provide me with)
Undoubtedly, most of you know what this part is right away:
I'd like to ask for some help on this one. First, I'd like to find out WHAT the empty 14-pin IC spot is for. Yeah, yeah... I know... a 14-pin chip. dUh. No, I'd like to find out what exact part number was originally intended for this location. Next, I'd like to know if anyone has ANY documentation on this board which indicates the empty spots being used by any parts at all. Last, does anyone have spare work/non-working samples of these boards available that I can have? I'm looking for a nice spread of them which will show me examples of every possible radial encoder device (I am aware of at least five different versions) as well as different revisions of the PCB itself (There has to be at least the original NOREV and revs A through H).
Here's the deal. I just got some parts made which brings the encoder board (steering board) reproduction project as well as the 4.5" Maxi-Trackball project alive once again. Yes! Before I start assembling these boards, I want to make sure that there isn't any need for *fully* populated boards... perhaps for some old 70's driving game I am unaware of. So, if there ever was a fully populated version, I'd need to know what parts go in those empty spots.
And here's the surprise:
BRAND NEW radial encoders fresh made and tested. These are the first that passed my testing. The impossible task has been making the special housing that the optical devices are placed in. I have to take into account so many factors, including among other things, the IR-transmissive properties of the plastic being used. I may still go with a different type for the full production run, but these seem to offer the best performance while blocking stray ambient light.
So, there you have it. The first radial encoders made in a LONG time.
Yes, I will be making these available as a separate part so people can repair their own equipment.
Enjoy!! (oh, and thank you for any help/support you can provide me with)
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