https://github.com/jbilander/sdbox-v3
A parallel to Pico 2 W and sd-card project for the Amiga
https://github.com/jbilander/sdbox-v3
Last synced: 5 months ago
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A parallel to Pico 2 W and sd-card project for the Amiga
- Host: GitHub
- URL: https://github.com/jbilander/sdbox-v3
- Owner: jbilander
- License: gpl-3.0
- Created: 2025-05-12T09:19:50.000Z (about 1 year ago)
- Default Branch: main
- Last Pushed: 2026-01-01T08:43:00.000Z (6 months ago)
- Last Synced: 2026-01-04T15:44:35.461Z (6 months ago)
- Size: 4.04 MB
- Stars: 6
- Watchers: 3
- Forks: 0
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# SDBox-v3
A parallel to Pico 2 W and sd-card project for the Amiga
***
Firmware for this project with support for a blinking activity LED can be built from source here:
https://github.com/jbilander/amiga-par-to-spi-adapter/tree/master/rp2350
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BOM Rev. 3C
---------
same as 3B but with these changes:
Reference | Name/Value | Package | Notes
-|-|-|-|
BT1 | Push button | Sunrom_Tactile_Switch_3x4x2mm_SMD_2-Pin | [Aliexpress](https://www.aliexpress.com/item/4001107238344.html)
D1-D2 (Optional) | SMD LED | 0603 | [Aliexpress](https://www.aliexpress.com/item/1005003836509392.html)
R1 (Optional) | 1k Ω | 0805 | (Mandatory if D1 populated) Series resistor for D1 LED, adjust R-value to your type of LED and preferred brightness
R2 (Optional) | 1k Ω | 0805 | (Mandatory if D2 populated) Series resistor for D2 LED, adjust R-value to your type of LED and preferred brightness
***
BOM Rev. 3B
---------
Reference | Name/Value | Package | Notes
-|-|-|-|
U1 | Raspberry Pi Pico 2 W | SC1633 (without header) | [RPi Pico 2 W](https://www.mouser.com/ProductDetail/358-SC1633)
U2 | SN74CBT16210 | TSSOP-48 6.1x12.5mm_P0.5mm | 20-BIT FET Bus switch with level shifting, high-speed TTL-compatible. [SN74CBT16210CDGGR ](https://www.mouser.com/ProductDetail/595-SN74CBT16210CDGG)
J1 | DB25_Male | DSUB-25_Male_EdgeMount_P2.77mm| DB25 Male [Aliexpress](https://www.aliexpress.com/item/1005006354086316.html)
J2 | Sunrom Micro SD Card Holder | 9-pin Micro SD card slot connector | Sunrom Micro-SD [Aliexpress](https://www.aliexpress.com/item/32802051702.html)
J3 | (Optional) UART0 PinHeader | 5-pin 2.54 mm pitch single row | Optional 5V-tolerant header for UART0 (TX on GP12, RX on GP13)
JP1 | (Optional) PinHeader/Jumper shunt | 2-pin 2.54 mm pitch single row | Jumper on connects Amiga /RESET signal together with RUN-pin (pin 30) on Pico 2 W, resets pico on Ctrl-A-A
D1 (Optional) | LED Square 2x5x7mm | PinHeader_1x02_P2.54mm_Vertical, pin pitch 2.54 mm | Power LED indicator [Aliexpress](https://www.aliexpress.com/item/1005006220921860.html)
D2 (Optional) | LED Square 2x5x7mm | PinHeader_1x02_P2.54mm_Vertical, pin pitch 2.54 mm | Activity LED indicator [Aliexpress](https://www.aliexpress.com/item/1005006220921860.html)
D3 | MMDL6050T1G Small Signal Switching Diode 200mA | SOD-323 | [MMDL6050T1G](https://www.mouser.com/ProductDetail/863-MMDL6050T1G)
R1 (Optional) | 4.7k Ω | 0805 | (Mandatory if D1 populated) Series resistor for D1 LED, adjust R-value to your type of LED and preferred brightness
R2 (Optional) | 220 Ω | 0805 | (Mandatory if D2 populated) Series resistor for D2 LED, adjust R-value to your type of LED and preferred brightness
R3 (Optional) | 10k Ω | 0603 | Pull-up for /STROBE signal, not currently used
R4 | 2.9k - 3k Ω | 0603 | Resistor for dummy loading D3 to achieve steady 0.6-0.7V VCC drop resulting in ~4.3V power supply to U2 [CR0603-FX-2941ELF](https://www.mouser.com/ProductDetail/652-CR0603FX-2941ELF)
RN1, RN2 | CAY16-103J4LF RES ARRAY 4 Resistors 10k Ω | 1206 | [CAY16-103J4LF](https://www.mouser.com/ProductDetail/652-CAY16-103J4LF)
RN3 | A103J | Bussed Resistor Network Array SIP-9 | Pull-up resistors for data lines, 9PIN-10K [Aliexpress](https://www.aliexpress.com/item/1005006954621214.html)
C1 | Capacitor 10uF | 1206 |
C2 | Capacitor 0.1uF = 100nF | 0805 |
C3 | Capacitor 0.1uF = 100nF | 0603 |
Housing | 2 x Plastic Shell Cover | For DB25 plug | [Aliexpress](https://www.aliexpress.com/item/1005004717091904.html)
2 x PinHeader | PinHeader Board Weight/Level Support | 3-pin 2.54 mm pitch single row | Move the plastic guard to leave ~7.5 mm of pin before soldering in order to hold board in perfect level
***
When ordering from JLCPCB select:
Specify Layer Sequence: Yes
L1(Top layer): F_Cu.gbr
L2(Inner layer1): GND_Cu.gbr
L3(Inner layer2): VCC_Cu.gbr
L4(Bottom layer): B_Cu.gbr
Remove Order Number:
Specify a location
This will notify JLC where to put the order number, they will replace the "JLCJLCJLCJLC" silkscreen label.
***