Uh Oh.Electron inbound

Any 8bit repairs, images, cool things, upgrades etc.
User avatar
mrbombermillzy
Posts: 1441
Joined: Sun Jun 03, 2018 7:37 pm

Re: Uh Oh.Electron inbound

Post by mrbombermillzy »

arkadiusz.makarenko wrote: Wed Feb 23, 2022 7:16 am Electron will work with DC PSU.
I have a variable 15-22vDC PSU, so will use that. Have you used a particular voltage successfully?

I'm just guessing that about 16VDC is around the average of a rectified signal.
User avatar
rubber_jonnie
Site Admin
Site Admin
Posts: 10479
Joined: Thu Aug 17, 2017 7:40 pm
Location: Essex
Contact:

Re: Uh Oh.Electron inbound

Post by rubber_jonnie »

mrbombermillzy wrote: Wed Feb 23, 2022 7:32 am
arkadiusz.makarenko wrote: Wed Feb 23, 2022 7:16 am Electron will work with DC PSU.
I have a variable 15-22vDC PSU, so will use that. Have you used a particular voltage successfully?

Im just guessing that about 16VDC is around the average of a rectified signal.
This is the PSU specs lifted direct from the service manual:

Screenshot 2022-02-23 at 09.59.47.png
Screenshot 2022-02-23 at 09.59.47.png (235.4 KiB) Viewed 2422 times

Hopefully will help.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
User avatar
arkadiusz.makarenko
Moderator Team
Moderator Team
Posts: 1208
Joined: Wed Jun 19, 2019 7:36 am
Location: Edinburgh

Re: Uh Oh.Electron inbound

Post by arkadiusz.makarenko »

mrbombermillzy wrote: Wed Feb 23, 2022 7:32 am
arkadiusz.makarenko wrote: Wed Feb 23, 2022 7:16 am Electron will work with DC PSU.
I have a variable 15-22vDC PSU, so will use that. Have you used a particular voltage successfully?

I'm just guessing that about 16VDC is around the average of a rectified signal.
I bought one elk which arrived with 16V DC psu, and it just worked.
Do not trust people. They are capable of greatness.
~ Stanislaw Lem
User avatar
mrbombermillzy
Posts: 1441
Joined: Sun Jun 03, 2018 7:37 pm

Re: Uh Oh.Electron inbound

Post by mrbombermillzy »

rubber_jonnie wrote: Wed Feb 23, 2022 10:01 am Hopefully will help.
Thanks ;)

I think Ideally, knowing the actual voltage, board side, straight after the power supply would really nail it.
If that isn't known and if we really want a precise measurement, then it'll be a case of finding out the size of the smoothing capacitor on the rectifier circuit and try to figure out therefore how fast the voltage drops in between the sine peaks and calculate a mean voltage. :)

Lets just say I sold my 'scope many moons ago, so that wont be happening! (Thats if I even had a 19VAC PSU to test!)

I'm guesstimating a 16VDC average, peak to drop mainboard side, but this may be wrong and I don't know what would need this on the board. (I would expect the usual 12v for motors/5v for the board components DC power lines, so wonder if there's something that actually uses AC in there, like e.g. the C=64 SID chip, that maybe gets stepped down and split off before the rectifier stage??).

Hope I'm making sense here. My electronics theory is very rusty. :lol:
User avatar
mrbombermillzy
Posts: 1441
Joined: Sun Jun 03, 2018 7:37 pm

Re: Uh Oh.Electron inbound

Post by mrbombermillzy »

arkadiusz.makarenko wrote: Wed Feb 23, 2022 12:40 pm
mrbombermillzy wrote: Wed Feb 23, 2022 7:32 am

I have a variable 15-22vDC PSU, so will use that. Have you used a particular voltage successfully?

I'm just guessing that about 16VDC is around the average of a rectified signal.
I bought one elk which arrived with 16V DC psu, and it just worked.
Well, that's probably the easiest/simplest answer. Thanks. That's what I will do then. :D
User avatar
rubber_jonnie
Site Admin
Site Admin
Posts: 10479
Joined: Thu Aug 17, 2017 7:40 pm
Location: Essex
Contact:

Re: Uh Oh.Electron inbound

Post by rubber_jonnie »

Both my original PSUs are 19vAC
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
User avatar
mrbombermillzy
Posts: 1441
Joined: Sun Jun 03, 2018 7:37 pm

Re: Uh Oh.Electron inbound

Post by mrbombermillzy »

Anyway, enough of derailing @rubber_jonnie's thread. When I'm ready, I will create my own 'Uh, Oh, electron/me too' thread! :lol:
User avatar
rubber_jonnie
Site Admin
Site Admin
Posts: 10479
Joined: Thu Aug 17, 2017 7:40 pm
Location: Essex
Contact:

Re: Uh Oh.Electron inbound

Post by rubber_jonnie »

mrbombermillzy wrote: Wed Feb 23, 2022 1:02 pm Anyway, enough of derailing @rubber_jonnie's thread. When I'm ready, I will create my own 'Uh, Oh, electron/me too' thread! :lol:
Hehehehe

:threadjacked:
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
User avatar
rubber_jonnie
Site Admin
Site Admin
Posts: 10479
Joined: Thu Aug 17, 2017 7:40 pm
Location: Essex
Contact:

Re: Uh Oh.Electron inbound

Post by rubber_jonnie »

Well, got one of these on the way, ElkSD64:

Screenshot 2022-02-25 at 09.54.01.png
Screenshot 2022-02-25 at 09.54.01.png (1.93 MiB) Viewed 2354 times

Expands the RAM to 64K and gives SD card storage, looks pretty neat :)
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
User avatar
stephen_usher
Posts: 5583
Joined: Mon Nov 13, 2017 7:19 pm
Location: Oxford, UK.
Contact:

Re: Uh Oh.Electron inbound

Post by stephen_usher »

Nice case. :-)
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
Post Reply

Return to “8 BIT CORNER”