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Please help! connecting speccy to a new style digital TVHi- I've been emulating for years but have just bought a real 48k Speccy to get that 'real' feeling of my youth (and to play my home programed games …
... 's enough to reset the oscillator in the TVs that existed ... -
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…
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…
[QUOTE=Jose_Leandro;599636]Hi
Not exactly. This clone gives RGB signal and have the possibility of compositive video using AD724 chip[/QUOTE]
Exactly as the Harlequin. This day and age I'd stick with rgb though.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…
... price for the components ( except AD724 that it not include because ...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…
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…
... price for the components ( except AD724 that it not include because ...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…
... price for the components (except AD724 that it not include because ...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…
... a reasonably good source of AD724's
[url ... .co.uk/itm/10-AD724JR-AD724-RGB-NTSC-PAL-Encoder-IC ... .uk/allhomesales/_i.html?_nkw=ad724&submit=Search&_sid ...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…
... EPROM burned): about 32?
AD724 kit(with the associated components ...128K heatsink no color in composite video and bad antenna outputI am currently repairing a ZX Spectrum 128K heatsink model. It gives no colors on composite video output, and very bad antenna output. I opened it a…
... capacitor in the 17.7MHz oscillator circuit.
[*]If you have ...ZX Spectrum 128K composite video fixes in 1 documentI just finished my document with video fixes and improvements for all ZX Spectrum 128K models. Download it here: [URL="http://benophetinternet.nl/ho…
... the right way? If the oscillator for the colour carrier is ...ZX Spectrum 128K composite video fixes in 1 documentI just finished my document with video fixes and improvements for all ZX Spectrum 128K models. Download it here: [URL="http://benophetinternet.nl/ho…
... the right way? If the oscillator for the colour carrier is ...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…
... :
-Resolved problem with AD724 (thank to flopping , mcleod, don ... the article, I received the AD724 ( the chip that make RGB ... you are a purist). The AD724 loss 4 lines of the ... to change the crytal for AD724 and cut the "default" track ...No colour after changing LM1889NI replaced the faulty LM1889N in my issue 2 spectrum, since I had a very yellow picture, and soldered a socket to put the new LM1889N into, however, …
... LM1889N) and to check the oscillator that's used for generating ...The new Superfo cloneHi In the spanish forum speccy.org some guys and me have optimized the superfo clon to have less ICs. The actual design has 39 ICs versus the 45 ICs…
... hobbist entusiasts: all ICs (except AD724) are in DIL package, passive ...Spectrum +2 gray strong noise at TV sound outputWhat could be the reason of strong sound noise at TV channel on gray +2? In the beginning this speccy was dead, it had faulty 78S05 and ZTX650. Added…
... on ferite coil right beside oscillator block. Tried going clockwise for ...How the DC-DC converter worksI've not seen this before. The DCC-DC converter inside the Speccy has always been quite a mistery for me: [url]http://www.tablix.org/~avian/blog/arch…
... , the idea of a quenching oscillator has problems with landing in ...DIY AY for 48k schematicHello! I can't seem to find a diy schematic for attaching AY to 48k so it gets 128k compatible sound. I see offers to sell ready made devices, but n…
... is the PLL synchronizes your oscillator with some source signal, in ... bits to your signal, your oscillator will keep on going at ... have a really, really good oscillator, you'll drift out of ... PLL (which includes its own oscillator) to regenerate the Spectrum 3 ...SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]
... store the bitstream. A 50MHz oscillator feeds the DCM (Digital Clock ...SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]
... locked loop and stable enough oscillator to regenerate the Spectrum's ... clock during contention, but my oscillator would keep on running). However ...SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]
... store the bitstream. A 50MHz oscillator feeds the DCM (Digital Clock ...SPECTRA New from Paul FarrowLooks good! Read about it [URL="http://www.fruitcake.plus.com/Sinclair/Spectrum/Spectra/SpectraInterface.htm"]here[/URL]
... PCB, no need for an oscillator...) but it turns out that ...Getting an 14Mhz crystal to oscillate?I am building a circuit with an 74LS32 and a 74LS193 to work as frequency divider. Though I have hit a snag, how to I wire up a crystal to make it os…
Make your own oscillator module:
[url]http://members.iinet.net.au/~davem2/overclock/osc.html[/url]Getting an 14Mhz crystal to oscillate?I am building a circuit with an 74LS32 and a 74LS193 to work as frequency divider. Though I have hit a snag, how to I wire up a crystal to make it os…
... method is to use an oscillator block - very reliable, stable, available ... can build a very simple oscillator circuit using a CMOS inverter ... oscillation (different circuit) or complete oscillator blocks.Getting an 14Mhz crystal to oscillate?I am building a circuit with an 74LS32 and a 74LS193 to work as frequency divider. Though I have hit a snag, how to I wire up a crystal to make it os…
... the input you create an oscillator. If there is too much ...Getting an 14Mhz crystal to oscillate?I am building a circuit with an 74LS32 and a 74LS193 to work as frequency divider. Though I have hit a snag, how to I wire up a crystal to make it os…
... you can get a crystal oscillator module instead.
[I ...Getting an 14Mhz crystal to oscillate?I am building a circuit with an 74LS32 and a 74LS193 to work as frequency divider. Though I have hit a snag, how to I wire up a crystal to make it os…
I will get an oscillator module instead. I just dont ... enough about the difference between oscillator modules and crystals, and how ...Getting an 14Mhz crystal to oscillate?I am building a circuit with an 74LS32 and a 74LS193 to work as frequency divider. Though I have hit a snag, how to I wire up a crystal to make it os…
In that case use an oscillator block, it might save you ... : make sure you get an oscillator block that's rated for ...Getting an 14Mhz crystal to oscillate?I am building a circuit with an 74LS32 and a 74LS193 to work as frequency divider. Though I have hit a snag, how to I wire up a crystal to make it os…
Can you not buffer the speccy's 14 MHz oscillator and then divide that by 8?
I assume your issue is that you don't want the clock to stop during contended reads or you could just use the 3.5MHz clock line...Getting an 14Mhz crystal to oscillate?I am building a circuit with an 74LS32 and a 74LS193 to work as frequency divider. Though I have hit a snag, how to I wire up a crystal to make it os…
... in a 14 MHz crystal oscillator circuit.
Perhaps it ...
