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The beginning of the end?It's been a long time coming but it looks like the end of traditional print newspapers as The Independent goes online only http://www.bbc.co.uk/ne…
... operated by normal 1.5v batteries (not a car battery or such) like ... -
Composite video ghost image on ZX Spectrum 128K +2Hi, I have a ghost image on the composite video out on my ZX Spectrum 128K +2 and have run out of ideas of what could be wrong. Does anybody have a…
... quick experiment and connected a 1.5V alkaline battery to the SCART "blanking ... -
ZX Spectrum 48K Issue 4B No soundHi, I have a ZX Spectrum 48K Issue 4B without sound. I tested the ULA on another Spectrum and works fine, tested the speaker and it has the correct …
... connect the terminals of a 1.5v AA battery to the speaker terminals ... -
Two-resistor fix for +3 sound distortionOver at Zonadepruebas, mcleod_ideafix has done a circuit analysis of our favorite distorted sound output: the issue 1 +3 AY chip sound output, and fr…
... distorted sound output: the issue 1 +3 AY chip sound output ... an output voltage up to 1 volt peak-to-peak and ... the negative part down to 1.5v.
On choosing the ... drops this down to 0.5v p.p, more than enough ... -
New member, dead SpeccyHallo everyone, I was directed here from a Commodore (boo, hiss) forum after pleas of aid with my newly acquired, quite dead 128k Speccy. I sincerely…
Since you're already measuring: Are -5V, +12V and -12V stable, too?
+12V ........ IC33 pin 14
-12V ........ IC34 pin 1
-5V ......... D19 anode
[ This Message was edited by: J?rg Pleumann on 2004-12-22 19:20 ] -
Didaktik Kompakt MI have probably spelt it incorrectly, but - does anybody know the power requirements for this little machine? What connectors does it use, polarit…
... Adapter that can set from 1,5V to 12V and can switch ... -
PC advice reqd.My monitor/graphic card seems to be acting up! I get strange sort of flicker (similar to the ones you get at slightly low voltage) on the monitor at …
... voltage is currently set to 1.5V which I thought was quite ... enough but maybe 1.7V is better? What settings ... -
PC advice reqd.My monitor/graphic card seems to be acting up! I get strange sort of flicker (similar to the ones you get at slightly low voltage) on the monitor at …
... voltage is currently set to 1.5V which I thought was quite ... enough but maybe 1.7V is better? What settings ... AGPVDD voltage is showing as 1.54. I can list the ... -
My Dell TFT Monitor deadMy Dell E171FPB monitor is dead... it wont turn on... even the LED wont come on.... I've checked the usual...cable and fuse.... I am trying to dism…
... 1 ----- 0V
2 ----- 35.5v
3 ------35.5v
4 ------35.5v ... Inverter
1 ------ 1.45v - 1.55v fluctuating
2 ... 2.5v
6-------1.3v-1.7v fluctuating average 1.5v
7------1.3v-1.7v Fluctuating avrage 1.5v
Spectrum +3 on Commodore 1084S D2[img]http://pspemulation.condor.serverpro3.com/forums3/download/screenshots/ZX_to_1084s.jpg[/img] [img]http://pspemulation.condor.serverpro3.com/for…
... output of Composite Sync is 5v 50mA, Spectrum's 1V 9mA ... 's rgb out is 5v, spectrum's 1.5v.
I recorded ...+2 grey PSU capacitor changeHi I opened up a +2 grey power supply (2.1A max output) unit in order to replace the aged electrolytic capacitor inside, just like I always do with …
... dropout would be around 1.5V (instead of 1.25V if a 6000uF ...Just organised my cd's....Last night, after searching for about half an hour for a cd that I knew I had, but for the life of me, couldn't find (it turns out that it was starin…
... only one(that is "1") AA battery and I can listen to ... hours of MP3s (burned on 1 CD). I use re-chargeable ...Just organised my cd's....Last night, after searching for about half an hour for a cd that I knew I had, but for the life of me, couldn't find (it turns out that it was starin…
... only one(that is "1") AA battery and I can listen to ... hours of MP3s (burned on 1 CD). I use re-chargeable ...Need to amplify output of voice recorderHello all! 1st post, so be nice to me... Pleeease! Well. I have several Spectrums (working: 3x 48k, 1x +, 1x 128k "Toaster", 1x +2 and 1x +2A; bust…
Thanks for the info! Nice site. :smile:
How about this one:
[URL="http://www.redcircuits.com/Page31.htm"]http://www.redcircuits.com/Page31.htm[/URL]
Mono, sensible to 90mV, uses 3V (2x 1.5V).winston's diagnostics boardHi Winston, I've recently built your diagnostics board on project board and am having huge problems getting it running. I've been pulling my hair ou…
... Q1 is not remaining at +5v.
Note ... usually somewhere around -1.0 to -1.5v or so for a ... supplying this with -1.3v relative to the +5v line (TTL ... the gate of Q1 and +5v. (The design as written ... is logic 1, the output voltage will be at 5v ensuring ...Transferring programs on real tapeHi, I've converted a TZX to WAV by using "TapeToWav" utility. Then I've tried to transfer the wave to a real tape, connecting the sound card speaker …
I have success with a old small journalist-type tape recorder (mono) .
It uses two 1.5V batteries (no ground loop problems ?)
And moderate turbo-loadings work too:
See it here : [url]http://www.youtube.com/watch?v=a7MAzwhMl9I[/url]The stupidest invention ever?Ask most people what is the stupidest invention ever, and you'll get lots of different answers; germ warfare, the Millenium Dome, the two weapon limi…
... /> Wire the motor to two 1.5v D sized batteries via a ...rubber key Spectrum 48k problem :(when i plug the spectrum in all i get is a black screen with a red border and sometimes flashing blocks. the spectrum worked until about 20 mins ago…
... RAM. You should get pin 1 -5V, pin 7 +12V, pin 8 ... +5V.
If you don' ...Demagnetiser?I've never used demagnetisers for audio/video heads and now wonder if they really help much? what type/rating should I look for (to be used with micr…
... size : IEC standard
Power : 1.5V dry cellBeginnerIm having a go at fixing a spectrum which has been in the loft for 20 years and would like some advice please.... I have downloaded the 'spectrum se…
... got between ground and pin 1 (-5v) when on the 200k scale ... .com/photos/73527395@N05/?saved=1[/url]
The red ...ZX Spectrum not working... issue 4S?Hi, I've bought a "new" broken ZX Spectrum +. The idea was to put an harlequin board inside, but for the moment I'm trying to put it in working order…
... the following:
- Vbb (-5v) --> -0.6v (starts at ... -1.2, but it drops slowly ... /> - Vdd (+12v) --> +1.5v
- Vcc (+5v) --> +5v (really +4.97v)
semi dead speccy 48k who can helpHi forum , i am busy recovering a 48 k speccy issue 3 board unit. With the help of a more experienced spectrum user from the uk , i managed to get…
... is no connection between pin 1 ( 5v ) and pin 28 on the ... achieve the same ( 2 diodes , 1 or 2 resistors ) all it ... arrange than simply piggback and 1 or-gate of an ls32 ...Issue 4S AnnoyanceRecently ive been going through a few interfaces testing them and I stupidly inserted a "key-less" interface (didnt know at the time but should have …
Pin 1 is the -5V line.
You read 0V, ... you got 2 options:
1. -5V supply is dead.
2 ... . -5V supply is overloaded, so the ... should normally read at least -5V.
If it does, then ...Barn find #4I think this is some sort of backup device. Its got "007" on the motherboard and the mice have chewed the buttons. Will do a little research later in…
... mode) that runs on two 1.5V coin cells to work out ...Tape loader for Android at lastHi all. Just downloaded a little util from the google play store called tapdancer. Works like the apple spectrum tape loader. Lets you load speccy an…
... runs off a couple of 1.5v batteries to provider the additional ... 3 AA batteries or DC2.5V to 4.0V via a ...eBay 128K Spectrum RGB cables overheat the Spectrum!?Hi everybody, For a long time I've wondered why Spectrum 128K Toastracks were overheating when using my Retro Computer Shack RGB SCART cable. Today …
... just tried the 2.5V solution by a voltage ... current is 40mA. For 1.5V into 75 ohms means the ... /design-training/Peritelevision/BS_EN_50049-1%20Peritelevision%20connector.pdf"]www. ... /design-training/Peritelevision/BS_EN_50049-1 Peritelevision connector.pdf[/URL]< ...ZX Spectrum Clock Signal Restorer Circuit[SIZE=5][U][B]ZX Spectrum Clock Signal Restorer Circuit[/B][/U][/SIZE] The circuit below is an experimental circuit. It has only been "tested" using…
... /clk signal of only about 1.0 ... 1.5V (from minimum to maximum ... Vcc = 2 V at Vcc=5V.
A comparator with ...ZX Spectrum Clock Signal Restorer Circuit[SIZE=5][U][B]ZX Spectrum Clock Signal Restorer Circuit[/B][/U][/SIZE] The circuit below is an experimental circuit. It has only been "tested" using…
... /clk signal of only about 1.0 ... 1.5V (from minimum to maximum ... Vcc = 2 V at Vcc=5V.
A comparator with ... voltage is exactly at 1.4 to 1.5V with (nearly) no hysteresis ...ZX Spectrum Clock Signal Restorer Circuit[SIZE=5][U][B]ZX Spectrum Clock Signal Restorer Circuit[/B][/U][/SIZE] The circuit below is an experimental circuit. It has only been "tested" using…
... /clk signal of only about 1.0 ... 1.5V (from minimum to maximum ... Vcc = 2 V at Vcc=5V.[/QUOTE]
Signal ...
