Something my Dad had built for me, he's no longer with us;(

[USMC Jimmy]

Hello,

I not sure if this is one of the best places to post this, but if it needs to be moved MODs, please do so.

Anyways, I just got back from my 2nd tour and before I left on the 2nd one, me and pops, he's no longer with us anymore, had built me a interface for my car, in the last move, I somehow misplaced the box I had it in.
I really wanted to comeback and enjoy our toy, but now that I can't find it.


Back to the point!!
So I know nothing about, this kind of work, but wanted to know if some kind person might he me out with this, I have worked for a few weeks on this and am getting really frustrated with this.

I still have a really long way to go on this, after he passed the bank just threw all his stuff away so I have limited DOC's and NO info on parts.

I have most of the parts figured out, but I lack a few this, KNOWLEDGE is this area.

Here's a picture of it, and what I think most of the parts are, can you help out for a min???
The picture is from when he got it back from his buddy who made it for us.
#1] resistor 2001
#2] SS S or 55 5.. Is this a diode?
#3] Diode orange, silver stripe in the middle and a black band on the end. I know this is a Zener somethings or other..
#4] National Semiconductor 39AF LM78L 05ACM
#5] 35V 10uf
#6] 35V 10uf
#7] SS S or 55 5
#8] 12F629 (E3) 1/SN 0505
#9] resistor 2001
#10] Tantalum "Cream colored", not sure if that right
#11] Tantalum "Cream colored", not sure if that right
#12] 20.000M o5
#13] resistor 2001
#14] resistor 2001

Thanks you very much!!!

Sgt Jimmy
USMC

 

[Resqueline]

The tough part in reconstructing this is making the code for #8, a 12F629 programmable microcontroller (PIC). You might want to find your late dad's buddy, otherwise you'll need to provide detailed documentation about both devices it connects to, to a programming competent person.
Apart from that it should be fairly easy, but there are some tracks underneath the parts (& the board) that you'll need to figure out where they go.
All resistors are 2000 ohms (2k).
The SS could be transistors (Q's) or dual diodes (D's), you'll find documents on the net describing what part # these SMD codes actually represents.
#3 is probably just an ordinary 1N4148 diode.
#4 is a 78L05, an ordinary 5V regulator.
#5 & 6 are electrolytic capacitors of the value you found.
#10 & 11 are ceramic capacitors of a value (33pF?) suitable for loading the (#12) 20MHz crystal.
Good luck!

 

[Wilksey]

Hi There,

As Resqueline has mentioned, item 8 is a PIC Micro Controller, which has code embedded into it, not easy to replicate without the original device code!
Items 10 and 11 will be respective of your crystal, usually between 18 - 33pf.
I see you have 12v, GND + a signal line.

What exactly does this do? Does it control something? It looks like some kind of controller circuit.

#7 looks like a transistor, as does #2.

If you can describe the function maybe we can re-construct it.

Regards

Wilksey