GNU General Public License v3.0

SDBOX (A parallel to sd-card project for the Amiga)

parallel2SD on amiga 500

https://www.youtube.com/watch?v=cdjNlg5xI-g

Amiga500 WB 1.3 whdload via JST , sdbox (microsd parallel Port hdd)

https://www.youtube.com/watch?v=VQdrOjCI9As

MIGs Yesterchips - Folge #097 SD-Box

https://www.youtube.com/watch?v=AxWvHaGmrws

For more information: https://github.com/jbilander/sdbox

BOM, now verified!

Please note, you don't need to populate C1 if you're not going to use the barrel jack. R5 is only needed if U3 is populated.

***

PART | Value | Description

----- | ----- | -------

U1  |    | Arduino Nano V3

U2  |    | Micro SD-Card Adapter (with onboard bidirectional level shifter)

U2  |Pin strip| 1 Pcs 2.54mm Single Row Male Pin Header Strip For mounting and connecting Micro SD-Card Adapter directly into base PCB. Cut out one with 6 pins and two with single pins. The current angled pins on module will be desoldered and removed.

U3  |PVG612S| Solid State Relay, 6-SMD (0,300", 7,62mm) Automatic power down with the Amiga (optional)

J1  |DB25  | DB25 Male MountingHoles 

J2  |5.5x2.1 mm | Barrel Jack Power Connector, center positive (optional)

C1  |100uF-220uF| 1210 ceramic decoupling capacitor for VIN, 16 VDC or at least above you voltage input 7-12V. Not needed if powering via USB.

R1  |4.7k Ohm| 1206 smd resistor (should give around 0.9mA when CS/SEL is high)

R2  |4.7k Ohm| 1206 smd resistor

R3  |120 Ohm| 1206 smd resistor (should give around 2.14V, 24 mA over D1)

R4  |120 Ohm| 1206 smd resistor (should give around 2.17V, 24 mA over D2)

R5  |330 Ohm| 1206 smd resistor (should give around 1.2V and 10 mA control current with the Amiga 47 Ohm in series from pin 14) Not needed if U3 not populated

D1  |LED 3mm| SD Activity LED, Diffused Orange / Amber, pitch 2.54 mm, 1.8V-2.3V, 20-30 mA, 605-610nm

D2  |LED 3mm| Power LED, Green Diffused T-1, pitch 2.54 mm, 25 mcd, 565 nm, 2.2 V, 25 mA

Q1  |BC847BW| Small Signal Transistor, NPN polarity, SOT-323

Q2  |BC847BW| Small Signal Transistor, NPN polarity, SOT-323

JP1  |Solder jumper| Enable this to reset Nano in conjunction with Ctrl-Amiga-Amiga

JP2  |Solder jumper| Enable this to use barrel jack connector without U3 chip

Note

I take no responsibiltiy for any damage to any equipment that results from the use of this board.

USE AT YOUR OWN RISK!