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Some Sinclair things for sale...Hi, I want to sell some ZX Spectrum things (click on photos to see larger ones): - [b]FAULTY[/b] ZX Spectrum power supply. It overheats and the only…
... and keyboard are spanish. With power supply, original packaging and RF ... and keyboard are spanish. With power supply.
OPTIONS: +2e kit ... for 5€, composite video mod for 5€.
Spanish ... -
(Re) building a ZX Spectrum laserharpThe Cambridge show is nearing, and I want to bring my laserharp with me. Why? Because it's built around a ZX Spectrum +2: [IMG]http://benophetintern…
... 5 times the light output power to get the same response ... be a perfectly responding sensor circuit.
But, the ... current version of the sensor circuit:
[IMG]http:// ... in circuitry, consumes very low power, and is very stable, even ... -
Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…
... there is also a triggering circuit.
Also I would ... switching regulator. Using a 12V power supply or a original spectrum ... divIDE or similar produces heating power of 1W and more at ... -
Faulty 128K toastrack keeps resettingHi. I have this toastrack which worked nicely for let's say 40 minutes and then a weird fault showed up. It keeps resetting over and over, sometimes…
... the current required by the circuit.
If the ... is part of a switching power supply circuit.
Same rule ... are used in a switching power supply circuit, you are always better ... be tested in circuit. But unless it is a power resistor, or ... -
WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... bottom side contains mainly the power section: regulators for 3.3V ... have a "dead cockroach" like mod to use 4532 DRAM's ... not to run into that mod as well. -
(Re) building a ZX Spectrum laserharpThe Cambridge show is nearing, and I want to bring my laserharp with me. Why? Because it's built around a ZX Spectrum +2: [IMG]http://benophetintern…
... needed.
But the sensor circuit now only has one potmeter ... look awesome!
The blue power led is used to show ... !
The new sensor circuit:
[IMG]http://benophetinternet ... -
ZX Spectrum power supplyHi, I'm looking for a small lightweight power supply that would be a perfect substitute for the original, it's meant for a video patched zx spectrum…
... a massive difference to the power dissipated by the Spectrum's ... to adjust my dc-dc circuit to test this. -
128k +2 (grey) Ear mod - New ULA and still problemsBverstee kindly sold me a 128K ula since the one in my +2 seemed to have a broken ear in. But even with the new ULA, I still can not load games throu…
... ]
Which tape deck circuit model is that? I have ... which had some sort of mod. I think it was supposed ... -
Needing new capacitors. Where to buy online?Hi. I need new axial capacitors for a whole bunch of Speccy boards I have. Problem is, it's been hard to buy some of them online. Some shops will onl…
... cap.
If your circuit needs an accurate capacitance that ... is smoothing DC from a power supply where the capacitance required ... -
Replaced Z80 now a very dark screen!Today I dag out an old issue 3 that ive known for a long time has a faulty Z80 (M1 line) so I heat gunned it out, socketed it and replaced it with a …
... ]Most likely a short circuit or open circuit somewhere. Checked for solder ... (I re-did the comp mod just to sure) -
New ZX Spectrum emulator for Jupiter AceProject page (sorry in Spanish) [url]http://retrolandia.net/foro/showthread.php?tid=36[/url] Try it in a Jupiter Ace emulator [url]http://jupiler.re…
... . A mod that doubles the ROM and a RC circuit that changes ... -
WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... it, along with the tiny circuit I've written for this ... a practically instant operation from power up (will do proper measures ... -
Revisiting Spectrum CPU clock regenerationWarning: This post will be a bit nerdy :-) Some time ago, I experimented with phase locked loop circuits as a possible way to regenerate the Spectru…
... a clock that's a power of 2 of 3.5MHz ... amplified by a small transistor circuit in the Spectrum and sent ... -
PLEASE HELP!! DEAD SPECTRUM!!Sad News!!! I have a spectrum issue 5 board and I'd done the general composite mod which was great and it worked with a divIDE plus (RWAP) and esxDO…
I did the mod you're talking about. Gotta ... was getting from that little circuit.
Now, that does ... -
PLEASE HELP!! DEAD SPECTRUM!!Sad News!!! I have a spectrum issue 5 board and I'd done the general composite mod which was great and it worked with a divIDE plus (RWAP) and esxDO…
... mod shouldn't actually be necessary - the last stage in the circuit ... 't important - and that transistor mod doesn't actually give a ... -
PLEASE HELP!! DEAD SPECTRUM!!Sad News!!! I have a spectrum issue 5 board and I'd done the general composite mod which was great and it worked with a divIDE plus (RWAP) and esxDO…
... mod shouldn't actually be necessary - the last stage in the circuit ... : Talking 48K. The simple transistor mod (1xR, 1xC, 1xTr) is also ... -
RF TuningWhat is the actual RF frequency that the Spectrum +3 uses? Thanks
The composite mod for the +3 isn't ... . You can just build the circuit freeform and wrap it in ... -
PLEASE HELP!! DEAD SPECTRUM!!Sad News!!! I have a spectrum issue 5 board and I'd done the general composite mod which was great and it worked with a divIDE plus (RWAP) and esxDO…
... you've removed the short circuit it won't work if ... back to the basic composite mod and the symptoms remained..
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…
... /> I'm not sure what mod you are referring to. :-? An ... places as mentioned above), and power supply / memory chip related (mostly ...Edge connector breakout board/level translator boardFor a new project I'm thinking of working on (gah, too many projects...) I'm going to be making a new edge connector breakout board. Basically what …
... is a 3.3v linear power supply, the CPLD and a ... /> Do not need words, the circuit responds to all the questions. :)Creating new hardwareThis is slightly off topic, but I hope some of you might be able to help. There is some amazing work on the Sinclair scene, creating new devices and…
... is harder. A small hardware mod is easy enough, understanding [I ... /> [*]Likewise: affordable services for prototype circuit boards in small quantities. There ...Dedicated Spectrum Emulation Machine Based on Raspberry PiI've mentioned this in another thread, so I thought I'd give it a thread of its own. I've wanted to build a dedicated Spectrum emulator for a long t…
... HDMI only.
External power supply with Spectrum-type connector ... to bother with an amplifier circuit.
Twin Interface II ...Tape loading for realHi, Having failed to load anything from my laptop or phone into my 48k, I have sourced a data recorder. An acorn ALF03. When I received the item I …
... />
Note that a different circuit is used on the Amstrad ... -amp in the cassette input circuit, so the datacorders were produced ... lower level signal from the "power amp" used to drive the ... it has a relatively high power output.
If you ...48k faultyHi guys! I have a 48k that, currently, presents 2 problems: 1 - Can?t sync to TV correctly. I get a lot of noise and the characters appear to be inc…
... helpful that video! I see power supply issues (the vertical banding ... />
P.S. Composite video mod is recommended in any case ...48K+ losing horizontal syncHello! I've got this 48K plus in perfect cosmetic condition and it works well except for when it gets a tad bit warmer the image rolls around. That w…
Stick with the composite mod. There's no reason for ... : to be clear, the old circuit in the modulator does no ...48K+ losing horizontal syncHello! I've got this 48K plus in perfect cosmetic condition and it works well except for when it gets a tad bit warmer the image rolls around. That w…
... ;660728]Stick with the composite mod. There's no reason for ... : to be clear, the old circuit in the modulator does no ...divide loading errorsHi All, Just bought a divide unit and I am having a few problems. I select the TAP file from the fatware browser, then do a load "". I get a lot of …
... gate (74LS14).
The modified circuit delays the /MREQ and makes ... /> I tried the mod myself, but after the mod the DivIDE bootscreen ... .
Pics of the mod:
[IMG]http://benophetinternet ...Another cause for DivIDE problems on 48K'sThe last months some topics were opened to discuss problems with 48K ZX Spectrums and DivIDE. Sofar we found: - Bad Z80's because of poor fanout (si…
Tried Ingo's mod this morning, but the ... did not work after the mod.
Replacing the Z80 ... br /> Of course Ingo's mod can't help when the ... br /> - Check ULA
- Check power levels (some 7805's fail ... a bad ZX board or power problems.
Anyone else ...i dont know how to use a spectrum!uhhh sorry to elbow in to your lovely fan site, but i'm from usa (living in uk) and selling a spectrum on ebay on behalf of an english friend. I jus…
... wondering what you used as power supply? The ZX Spectrum takes ... machine doesn't work, the circuit board is usually okay & ...ZX Spectrum + 2 128K - Video Issue?Hi All, I have just picked up a secondhand +2 and am having a problem with it. :( When I power the unit on and hook it up to my TV with the RF cable…
... grey case and the DC power jack is a 2.1mm ... /5.5mm low voltage power connector like on the 48k ... DIN socket for it's power socket. The PSU is marked ... as a +2A, but the circuit board inside is smaller. It ...
