16k Sinclair issue 1 pack
Re: 16k Sinclair issue 1 pack
I have some N4007 - should I use those instead?
All that I've learned - https://msknight.com/bbc/index.html#zx81
Re: 16k Sinclair issue 1 pack
This is messy, but it's "open" so you can see what I've done. - probably something stupid, knowing me.
All that I've learned - https://msknight.com/bbc/index.html#zx81
- 1024MAK
- Posts: 5165
- Joined: Mon Sep 26, 2011 10:56 am
- Location: Looking forward to summer in Somerset, UK...
Re: 16k Sinclair issue 1 pack
No. They are designed for low frequency use.
Mark
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer being good this year.
ZX81 Chip Pin-outs
ZX81 Video Transistor Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer being good this year.
- 1024MAK
- Posts: 5165
- Joined: Mon Sep 26, 2011 10:56 am
- Location: Looking forward to summer in Somerset, UK...
Re: 16k Sinclair issue 1 pack
I think I will need to open those pics on a PC rather than my 'phone while crawling around in the loft
Mark
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer being good this year.
ZX81 Chip Pin-outs
ZX81 Video Transistor Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer being good this year.
Re: 16k Sinclair issue 1 pack
Don't hit your head on any beams!
All that I've learned - https://msknight.com/bbc/index.html#zx81
Re: 16k Sinclair issue 1 pack
Just for good measure... measure... geddit? ... this is what's being fed up the /RD line.
All that I've learned - https://msknight.com/bbc/index.html#zx81
Re: 16k Sinclair issue 1 pack
Well, after my repeated botched attempts, I managed to short the ground to the 9v and caused some trouble. After reverting the RAM pack and re-bridging the cut connectors... fortunately, the RAM pack is working.... somehow.
I'm doing nothing more until I receive more solid advice, because it's clear that I am at risk of doing some serious damage.
I'm doing nothing more until I receive more solid advice, because it's clear that I am at risk of doing some serious damage.
All that I've learned - https://msknight.com/bbc/index.html#zx81
Re: 16k Sinclair issue 1 pack
You should use Schottky diodes to pull TTL signals to low!
The diodes and the resistor can be soldered directly to the pins of the connector:
https://forum.tlienhard.com/phpBB3/down ... hp?id=8612
(Perfectly viewable on a 22" monitor)
The diodes and the resistor can be soldered directly to the pins of the connector:
https://forum.tlienhard.com/phpBB3/down ... hp?id=8612
(Perfectly viewable on a 22" monitor)
My ZX81 web-server: online since 2007, running since dec. 2020 using ZeddyNet hardware
http://zx81.ddns.net/ZxTeaM
http://zx81.ddns.net/ZxTeaM
Re: 16k Sinclair issue 1 pack
I have...
1N5822
1N5408
...both are quite chunky.
I also have 1N4007 but Mark has already said those are for low frequency applications.
What do you recommend me getting?
1N5822
1N5408
...both are quite chunky.
I also have 1N4007 but Mark has already said those are for low frequency applications.
What do you recommend me getting?
All that I've learned - https://msknight.com/bbc/index.html#zx81
Re: 16k Sinclair issue 1 pack
I also have - BZX85C5V1
All that I've learned - https://msknight.com/bbc/index.html#zx81