[Coco] BOM for RGB2VGA

[Zippster]

Michael,

For the Video DAC resistors you’ll want 1% tolerance or better.  The rest can be 5% carbon or better.

These are the revised restore values that follow the SE version silkscreen, they should be used on the
original OSH Park boards as well, but they won’t match the silkscreen.

The following would be suitable parts. These are manufacturer part numbers.


Video DAC

390 Ω (x3)	-	ERO-S2PHF3900
820 Ω (x3)	-	RNMF14FTC820R
1.8K (x3)		-	RNMF14FTC1K80

Sync output resistors

47 Ω (x2)	-	RNMF14FTC47R0

3-bit tuning DAC

1K (x2)	-	MFR-25FBF52-1K
2K (x3)	-	MFR-25FBF52-2K

10K trimmer (x1)	-	3319P-1-103

RGB termination resistors

82 Ω (x3)	-	MF1/4DCT52R82R0F

Sync voltage divider resistors

6.8K (x2)		-	MF1/4DCT52R6801F
1.2K (x2)		-	MF1/4DCT52R1201F

Sync splitter circuit

LM1881 (x1)	-	LM1881N/NOPB

680K (x1)	-	ERO-S2PHF6803

8-pin DIP socket (x1)	-	any 8-pin .300 socket ( (2.54 lead spacing)
.1uf cap (x2)	-	any .1uf ceramic cap (2.54 lead spacing)

DIP switch

8 position DIP (x1)	-	CTS 206-8ST

The female headers, the 10-pin RGB header, the 2-pin headers for jumpers are all
just standard 2.54mm (.1”) spacing parts.

For the RCA jack I used CUI RCJ-017, but these require trimming to fit.

The VGA connectors I don’t have a part number for, but they are standard connectors.
Just make sure they look the same. Here is a pic of assembled boards for reference.

<https://drive.google.com/open?id=0B1sgl615FlGnLW4wcEZiNmZmaEE <https://drive.google.com/open?id=0B1sgl615FlGnLW4wcEZiNmZmaEE>>

- Ed


> On Jan 23, 2016, at 2:29 AM, Michael Furman <n6il at ocs.net> wrote:
> 
> Would anyone happen to have a bill of materials handy to populate an RGB2VGA board? Digikey Mouser or Jameco are fine, just want to save the time and to avoid errors selecting the components.  When I checked before the component descriptions from the web site weren't exact matches for Digikey parts and for some parts there were many many choices.
> 
> Thanks.
> 
> --
> Michael R. Furman
> Email: n6il at ocs.net
> Phone: +1 (408) 480-5865