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C64-rf modulator replacement

mbarszcz-pcb·c64-rf-modulator-replacement·kicad/C64 RF Modulator Replacement.kicad_pcb

C64-rf modulator replacement PCB layout, top view — open source board by mbarszcz-pcb
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About the C64-rf modulator replacement PCB

C64-rf modulator replacement is an open source PCB design by mbarszcz-pcb, published on GitHub under the MIT license. It is a 2-layer board measuring 51.8 × 32.6 mm, with 31 components from 21 distinct parts.

Other key parts include the L78L05CZ. By type, the board carries 11 resistors, 6 capacitors, 5 jumpers, 2 transistors, 2 connectors and 1 IC.

It belongs with the retro computing designs in this gallery.

From the project

C64 Composite/S-Video RF Modulator Replacement

This design has a few goals that set it apart from the others:

1. It is a universal solution that fits and is electrically compatible with both the C64 and C64C without having to change components on the board or run jumper wires for power.

2. It is easy and inexpensive to build with only a single, small PCB and all through-hole components.

3. It provides high quality S-Video (Y/C) output while maintaining composite video output for compatibility.

C64-rf modulator replacement, from the project README
From the project README

Main components on the C64-rf modulator replacement

L78L05CZ

C64-rf modulator replacement bill of materials (BOM)

31 components, 21 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
L78L05CZ
78L05
STMicroelectronics
U1
2
BC547B
BC547
ON Semiconductor
Q1, Q2
2
Conn_01x04_Male
J1, J2
5
Jumper_3_Open
JP1, JP2, JP3, JP4, JP5
1
3296W-1-102LF
1K
Bourns Inc.
RV1
1
3296W-1-221LF
220
Bourns Inc.
RV2
1
1N4148
ON Semiconductor
D2
1
78F100J-RC
10uH
Bourns Inc.
L2
1
SR151A331JAA
330pF
AVX Corporation
C1
2
USV1E100MFD1TP
10uF
Nichicon
C3, C8
1
SR205E334MAR
0.33uF
AVX Corporation
C5
1
SR151A680JAR
68pF
AVX Corporation
C6
1
SR205E104MAR
0.1uF
AVX Corporation
C7
2
CF14JT1K00
1K
Stackpole Electronics Inc
R1, R62
1
CF14JT3K30
3.3K
Stackpole Electronics Inc
R2
1
CF14JT5K60
5.6K
Stackpole Electronics Inc
R3
1
CF14JT68R0
68
Stackpole Electronics Inc
R4
1
CF14JT220R
220
Stackpole Electronics Inc
R5
1
CF14JT75R0
75
Stackpole Electronics Inc
R7
3
CF14JT150R
150
Stackpole Electronics Inc
R8, R11, R12
Show 1 more
QtyPartRefs
1
CF14JT470R
470
Stackpole Electronics Inc
R61

C64-rf modulator replacement design files

The KiCad project lives in the mbarszcz-pcb/c64-rf-modulator-replacement repository on GitHub; these links point at the commit this page was built from.

C64-rf modulator replacement: common questions

How big is the C64-rf modulator replacement PCB?

The C64-rf modulator replacement measures 51.8 × 32.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the C64-rf modulator replacement?

31 components, from 21 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the C64-rf modulator replacement design files?

From the mbarszcz-pcb/c64-rf-modulator-replacement repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the C64-rf modulator replacement design in my own project?

Yes, under the terms of its MIT license, which mbarszcz-pcb chose for the repository.

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