DIY Upgrade Components

This section is for discussing everything about Next hardware and latest updates.
Post Reply
User avatar
Andy P
Posts: 123
Joined: Mon May 29, 2017 9:15 pm
Location: Lancashire

DIY Upgrade Components

Post by Andy P » Fri Jun 23, 2017 11:11 pm

We all know that Just The Board and the basic Next has parts missing such as the RTC and WIFI so I have started this topic to add part numbers to help people carry out the upgrades themselves if they wish to.
Also I have included the SRAM memory upgrade option for all versions of the Spectrum Next.

These are the parts that can be fitted.

The WIFI module:
ESP-01 (ESP8266) WIFI Transceiver.

RTC Components:
DS1307 RTC. I2C (DIP-8).
DIP8 DIL socket. Not mandatory but personally recommended.
32.768KHz Crystal 3mm Diameter (Cylinder). Load Capacitance 12.5pF.
CR2032 Battery Holder.
CR2032 Battery.
Pictures of components fitted: here.

Memory upgrade:
The SRAM part numbers known to work so far are in blue. If anyone can confirm others please let me know.
71V424S10Y(G) by Integrated Device Technology, Inc (IDT).
Other equivalents are:
AS7C34096A-10JCN (10JIN) by Alliance Semiconductor Corp.
K6R4008V1D-JC10 (JI10) by Samsung Electronics.
MCM6946YJ10 by Motorola, Inc.
CY7C1049CV33-10VC by Cypress Semiconductor corp.
IS61LV5128AL-10K(LI) by Integrated Silicon Solution, Inc (ISSI).
There are two slots available for the SRAM upgrade.
Instructions for fitting the extra SRAM can be found: here.

Internal Speaker:
Approx 20 - 25mm magnet, impedance 8 - 16 ohm or any basic PC BIOS piezo type speaker.
1X4 pin male header (2.54mm / 0.1" spacing). If fitting in a Spectrum case then use a right angle pin header.
Some info on fitting:here.

Acceleration:
Raspberry PI ZERO V1.2 or V1.3.
or Raspberry PI ZERO W V1.1.
2X 20 pin female header (2.54mm / 0.1" spacing).

Second SD Card Slot:
SMD Micro SD Card Holder - underneath the board. (Works from update V0.7).
A picture of one fitted: here.

Disclaimer: Check all parts with the corresponding datasheets yourself before ordering as there may be mistakes.

External related links:
A simple solderless power switch alternative: here.
Header pin options for J15 NEXT GPIO: here & here
Other board connectors and pinout reference: here.
Capacitor mod. (Only applies to issue 2A boards). This info should help you decide which to fit: here & here.

I would like to thank all who takes part with their input & feedback, no matter how small.

Edit 1: 28/06/2017 - Corrected miner speling mistackes haha ;).
Edit 2: 03/08/2017 - Changed the RTC IC package to DIP-8.
Edit 3: 03/08/2017 - Corrected the Crystal frequency thanks to Balrockus.
Edit 4: 31/08/2017 - Added internal speaker. Thanks to contributions from MikeCad & mitja_i.
- Added more memory part numbers thanks to dave18 for spotting the ISSI variant.
- Added the battery itself (although that's obviously required).
- Altered the acceleration category with info thanks to Timbucus.
Edit 5: 01/09/2017 - Added or changed something ... can't remember !.
Edit 6: 14/09/2017 - Added pin header to Acceleration thanks to mitja_i.
- Added possible second SD Card Slot although this is unclear on the new revision 2A PCB.
Edit 7: 15/12/2017 - Removed guesswork to some sections due to board receipt.
- Added temp advice to Memory Upgrade section. Added header to int. speaker.
Edit 8 & 9: 18/12/17 - Amended page and fitted a link to speaker section.
Edit 10: 20/12/2017 - Added link to RTC components fitted and menu showing RTC working.
Edit 11: 27/12/2017 - Added link to pic for 2nd SD card fitted.
- Highlighted known SRAM to work stable after update 0.7 thanks to Eratosthenes for verifying the Samsung.
- Added extra info on speaker pin header if fitted to 48K cases thanks to Koipin.
Edit 12: 29/12/2017 - Changed Alliance SRAM to equivalent as IDT is the fitted part.
Edit 13 & 14: 29/12/2017 - Added greeting.
Edit 15: 07/01/2018 - Altered Internal Speaker info & PI Zero info thanks to Bleugh for verifying the Zero W.
Edit 16: 20/01/2018 - Added DIP8 socket and recommended diameter of crystal for RTC. Slight clean up to links.
Edit 17: 22/01/2018 - Added extenal links to useful info.
Edit 18: 17/02/2018 - Added more external links.
Last edited by Andy P on Sat Feb 17, 2018 2:03 am, edited 18 times in total.

User avatar
Timbucus
Posts: 223
Joined: Tue May 30, 2017 7:43 pm

Re: DIY Upgrade Components

Post by Timbucus » Sat Jun 24, 2017 9:42 am

The rPI Zero W in theory should work but, is not tested by the team. It will need a recompile of the firmware so not for beginners. Note that the team have also stated the rPI0w Wifi is unlikely to be mainstream for the project as it has the WiFi module for that.

viewtopic.php?f=4&t=11
I'm Infinite Imaginations when not in work... PAWS for thought.

User avatar
fableman
Posts: 1
Joined: Fri Jun 23, 2017 2:18 pm

Re: DIY Upgrade Components

Post by fableman » Sat Jun 24, 2017 4:20 pm

I suppose 913-AS7C34096A-10JIN is a viable alternative as well?

User avatar
Andy P
Posts: 123
Joined: Mon May 29, 2017 9:15 pm
Location: Lancashire

Re: DIY Upgrade Components

Post by Andy P » Sat Jun 24, 2017 7:50 pm

fableman wrote:
Sat Jun 24, 2017 4:20 pm
I suppose 913-AS7C34096A-10JIN is a viable alternative as well?
Yes the only difference is this is industrial temp rated (JIN) as opposed to the commercial JCN

User avatar
beanz
Posts: 173
Joined: Tue May 30, 2017 12:30 am

Re: DIY Upgrade Components

Post by beanz » Sun Jun 25, 2017 2:43 pm

What about the internal speaker, anyone have a suggestion for that?

User avatar
mitja_i
Posts: 223
Joined: Tue May 30, 2017 6:27 am
Location: Ljubljana, Slovenia
Contact:

Re: DIY Upgrade Components

Post by mitja_i » Sun Jun 25, 2017 9:30 pm

Yes, from the FAQ:
1-inch piezo with impedance 16 ohm (type 16R, or the one in black plastic).
Backer 423 @ 37% funded 29 days left
---
ZX Spectrum Next glossary

User avatar
beanz
Posts: 173
Joined: Tue May 30, 2017 12:30 am

Re: DIY Upgrade Components

Post by beanz » Mon Jun 26, 2017 11:59 am

mitja_i wrote:
Sun Jun 25, 2017 9:30 pm
Yes, from the FAQ:
1-inch piezo with impedance 16 ohm (type 16R, or the one in black plastic).
Right, I was thinking more of an actual part number/recommendation for mouser or digikey...I had a look on there and couldn't really decide which would be a good/suitable one.

User avatar
MikeCad
Posts: 184
Joined: Mon May 29, 2017 1:16 pm
Location: United Kingdom

Re: DIY Upgrade Components

Post by MikeCad » Mon Jun 26, 2017 4:21 pm

I haven't had a chance to hunt one of these down on a proper retailer web site yet.

http://www.ebay.com/itm/5-Pack-Lot-Comp ... SwrklVWu~F

But in Victor's words, it's just a PC beeper.

Image
ZX80, ZX81, Spectrum 48K, Spectrum +2, QL, Atari 130XE, Atari ST, Atari Falcon, Acorn A3000..

User avatar
beanz
Posts: 173
Joined: Tue May 30, 2017 12:30 am

Re: DIY Upgrade Components

Post by beanz » Mon Jun 26, 2017 4:48 pm

Ok thanks, when I was looking on mouser there were ones of various voltages 30v 9v etc etc. I can probably just pull the PC beeper off an old motherboard.

I'll be putting one on my August "board only" and from there decide if I want to put it on the full NEXT. Might put a switch inline to turn it on/off.

User avatar
MikeCad
Posts: 184
Joined: Mon May 29, 2017 1:16 pm
Location: United Kingdom

Re: DIY Upgrade Components

Post by MikeCad » Mon Jun 26, 2017 4:56 pm

Let me chase down an answer, I heard it was able to be switched on and off in the config. Need to confirm.
ZX80, ZX81, Spectrum 48K, Spectrum +2, QL, Atari 130XE, Atari ST, Atari Falcon, Acorn A3000..

Post Reply