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STD A2e_80Col_RGB_SMT_V1.1

A2e_80Col_RGB_SMT_V1.1

Project tags

License

CERN Open Hardware License

License: CERN Open Hardware License

Mode:

Mode

Editors' pick

Editors' pick

Cloned from A2e_80Col_RGB_SMT_V1.0

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Update time: 2024-02-14 13:51:48
Creation time: 2022-11-16 13:06:58
Description

Description

This is a new RGB (SCART) card for the venerable Apple 2e computers.

 

It connects to the AUX port and in order not to loose functionality also includes a 64kB memory expansion and enables the 80 columns display mode.


The schematic for the memory expansion side is similar to all memory expansion from the early days.

 

The RGB decoding part is using only standard logic components as it woudl have been done 40 years ago.

This make this design simple and very easy to build without any special tools to program complex devices.

 

My philosophy is also to avoid putting devices having 100 or 1000x the horsepower of the original computer to provide improvements.

Design Drawing

Design Drawing

schematic diagram
1 /
PCB
1 /
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ID Name Designator Footprint Quantity
1 17-21SUYC/TR8 5V,12V LED0805-RD 2
2 100nF C5,C6,C7,C8,C9,C10,C11,C14,C15,C16,C1,C2,C3,C4,C17 C0603 15
3 100pF C12 C0603 1
4 47uF C13 C1206 1
5 10uF C18 CAP-SMD_BD5.0-L5.3-W5.3-FD 1
6 1N4148WS T4 D1 SOD-323_L1.8-W1.3-LS2.5-RD 1
7 X9555WV-2X04-6TV01 H1 IDC-TH_8P-P2.54_XKB_X9555WV-2X04-PTV01 1
8 JUMPER2 H2,J1 HDR-TH_2P-P2.54-V-M-1 2
9 10K R11,R12,R25,R34 R0603 4
10 1K R13,R14,R15,R16,R17,R18,R19,R21,R33,R36,R38,R39 R0603 12
11 270 R20 R0603 1
12 5kΩ R22 RES-ADJ-SMD_3P-L3.8-W3.6-P1.90-BL 1
13 15K R23,R24 R0603 2
14 30K R26,R27 R0603 2
15 20K R28,R29 R0603 2
16 75 R30,R31,R32 R0603 3
17 3.3K R35 R0603_NEW 1
18 4.7kΩ R37,R40,R41,R42,R43,R3,R4,R5,R6,R7,R8,R9,R10 R0603 13
19 5-146278-3 SW1,SW2 HDR-TH_3P-P2.54-V-M 2
20 SN74HC00PWR U5,U11 TSSOP-14_L5.0-W4.4-P0.65-LS6.4-BL 2
21 74HC173D,652 U6,U7 SOIC-16_L9.9-W3.9-P1.27-LS6.0-BL 2
22 74HC04PW,118 U8 TSSOP-14_L5.0-W4.4-P0.65-LS6.4-BL 1
23 74HC157PW,118 U9 TSSOP-16_L5.0-W4.4-P0.65-LS6.4-BL 1
24 74HC32PW,118 U10 TSSOP-14_L5.0-W4.4-P0.65-LS6.4-BL 1
25 74HC164PW,118 U12 TSSOP-14_L5.0-W4.4-P0.65-LS6.4-BL 1
26 SN74HC20PWR U13 TSSOP-14_L5.0-W4.4-P0.65-LS6.4-BL 1
27 FMS6143CSX U14 SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL 1
28 Solder Jumper J2 SOLDER JUMPER 3 PAD 1
29 47Ω R1,R2 R0603 2
30 APPLE2_AUX_SLOT SLOT PCB_EDGE_CONNECTOR_30X2 1
31 TMS4464 U1,U2 18DIP300 2
32 74HCT574PW,118 U3 TSSOP-20_L6.5-W4.4-P0.65-LS6.4-BL 1
33 74HCT245PW U4 TSSOP-20_L6.5-W4.4-P0.65-LS6.4-BL 1
34 SN74HCT14PWR U15 TSSOP-14_L5.0-W4.4-P0.65-LS6.4-BL 1

Unfold

Project Attachments

Project Attachments

Order File name Download times
1

db9_pinout.JPG

17
2

A2eRGB_NTSC_Install.pdf

20
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