RGB to Component (simple)

1 year ago 483
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  • BOM
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Description

So yea if you already have luma or a split supply there are much easier ways to do this conversion (I will make soultions for these situations soon). This is meant to be a standalone end point solution that doesnt care what sync you have or anything else,. just doing the math for rgb to ypbpr conversion and pulsing Y -300ish mv on sync. The key here is that this is running off a single 5v supply and not using a rail splitter or a negative rail.

Will this work ? Probably. Are there "better" ways to do this ? Also probably.

I have finally chosen the op amp I want for this design LMH6722 and will port everything over. 2x LMH6882's could also be used but it's more expensive. I have the ratios figured out but I have to change rf till I can find resistor values that exist.

Documents

Sheet_1

thingtotest

BOM

ID Name Designator Footprint Quantity
1 LM1881M U4 SOIC8 1
2 0.1uf C3,C4,C5 C0805 3
3 680k R20 R0805 1
4 402 R15 R0805 1
5 787 R16,R3 R0805 2
6 2.1k R17 R0805 1
7 475 R18 R0805 1
8 300 R19,R29,R30,R40,R41 R0805 5
9 750 R21 R0805 1
10 1k R22 R0805 1
11 500 R23 R0805 1
12 75 R24,R36,R37,R38,R39 R0805 5
13 1.3k R1 R0805 1
14 2.55k R2 R0805 1
15 4.12k R4 R0805 1
16 120 R27,R28 R0805 2
17 430 R5 R0805 1
18 330 R6,R32 R0805 2
19 JUMPER-2-OLDSMD-NO JP1,JP2 SJ_2S-NO 2
20 SCART-F J3 SCART 1
21 0.22uf C33 C0805 1
22 10u C8 C0805 1
23 1u C2 C0805 1
24 0.22u C11,C1 C0805 2
25 CSI CSI HDR-M-2.54_1X1 1
26 5AY3UD09 LED1 LED-5MM 1
27 RCJ-2123 U2 DUAL RCA JACK COPY 1
28 TPS2105DBVR U6 SOT-753 1
29 Power Connector 2x5.5mm U5 PJ-037AH 1
30 1u C6,C28 C0805 2
31 220uF C9,C10,C7 CAP-TH_BD8.0-P3.50-D1.0-FD 3
32 LMH6682MM U1,U3 TSSOP8_3 2
33 RCA1x3 J1 CUI-RCJ-32 1

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