-
Notation questionI wasn't quite sure where to put this post, so anyone's welcome to move it whereever may be more appropriate. So I'm reading about Z80 interrupts he…
... ), and operate normally when high (5v, LOGIC 1) -
Notation questionI wasn't quite sure where to put this post, so anyone's welcome to move it whereever may be more appropriate. So I'm reading about Z80 interrupts he…
... for logic 1 which is 5V
It really depends ... to the appropriate 0v or 5v power line (or through say ... -
Notation questionI wasn't quite sure where to put this post, so anyone's welcome to move it whereever may be more appropriate. So I'm reading about Z80 interrupts he…
... one that ties /BUSRQ to 5V.
To select, you then ... -
Composite vs SCARTIs there a significant difference from using AV composite video and RGB SCART video? I have played various games with composite, then on RGB, and th…
... /> And if you supply only +5V or 6V on SCART pin ... -
Notation questionI wasn't quite sure where to put this post, so anyone's welcome to move it whereever may be more appropriate. So I'm reading about Z80 interrupts he…
... straight to Vcc (i.e. +5v) in the case of an ... 1 (i.e. 0v and +5v, electrically). The third state really ... signal is neither tied to +5v or 0v by the output ... a conductive path from the +5v line to the chip's ... , a path is connected to +5v. Except with NMOS, there is ... -
My SurplusHere's a list of stuff that I plan to sell. Please let me know if you're interested in any of the items listed below. If you need pictures or more de…
My SurplusHere's a list of stuff that I plan to sell. Please let me know if you're interested in any of the items listed below. If you need pictures or more de…
[QUOTE=hldswrth;199335]
The transistor looks like this, viewed from underneath:
[code]
comp signal
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| oZX81 - Modulator problems...Not a spectrum I know, but does anybody here have an experience of repairing ZX81s? When I dusted mine down recently and plugged it in, the display …
... of insulation - that's the 5V line).
You should ...ZX Spectrum 128+ problemsHello!I recently purchased and got myself a spectrum 128+ from ebay.The item did not have an original power supply so i got a power supply of 9volts …
... the 7805 to do the +5V regulation and you have the ...ZX Spectrum 128+ problemsHello!I recently purchased and got myself a spectrum 128+ from ebay.The item did not have an original power supply so i got a power supply of 9volts …
... by 7805. It should be 5V of course.
[QUOTE ...Spectrum 128 loading volumeToday I recieved my 128k haetsink spectrum, what i noticed is that it needs even higher sound volume for loading through tape than the 48k+. To be mo…
... up and down by around +/- 5V ~, and therefore, most stuff that ... is just a train of 5V pulses, some longer than the ...ZX Spectrum 128+ problemsHello!I recently purchased and got myself a spectrum 128+ from ebay.The item did not have an original power supply so i got a power supply of 9volts …
If 7805 gives 5V but gets overheated, it's usually okay itself but overloaded by shortage in cirquits that powered up from it.ZX Spectrum 128+ problemsHello!I recently purchased and got myself a spectrum 128+ from ebay.The item did not have an original power supply so i got a power supply of 9volts …
... output pin (the one with 5V)
and see the temperature ... and see DC current at +5V line.+3 Sound Mod.Hi All, I am very much a novice when it comes to building electronics, but I thought I'd have a go at [url]http://www.geocities.com/sinclair_bitz/st…
... at least 7v to produce 5v (my + has a 9v source ...+3 broken driveHi, I bought a +3 from E-bay, but the drive doesn't work :( I am not so familiar with Speccys, I know how to program them, but this is the first I'…
... the drive may be getting +5v (I really need to check ...Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …
Right, i just wanted to confirm it.
Why are the resistor and the diode necessary.... also i can se a green wire conecting pin 1 and 28 together, this is probably for the +5V.Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…
... />
Pin 1: Should show -5v (MINUS 5 volts)
Pin ...
Pin 9: Should show +5v
- If the voltages ...Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…
... unused pin (top left) from -5V and connected it to 0V ... , and disconnected the +5V pin (bottom left) from +12V ... 0V are now tied, and +5V and A7 are now tied ...Does anyone have any working Ferranti's?Does anyone know where I might get hold of a Ferranti ULA5C112E-3?? I think this is the problem with one of my rubber key 48K's as it otherwise wor…
... 1 of IC6 should be -5V.
That is almost ... all the proper voltages except -5V, then it should be D16 ...Does anyone have any working Ferranti's?Does anyone know where I might get hold of a Ferranti ULA5C112E-3?? I think this is the problem with one of my rubber key 48K's as it otherwise wor…
... 1 of IC6 should be -5V.
That is almost ... all the proper voltages except -5V, then it should be D16 ...Does anyone have any working Ferranti's?Does anyone know where I might get hold of a Ferranti ULA5C112E-3?? I think this is the problem with one of my rubber key 48K's as it otherwise wor…
... you still don't have -5V, it's very hard to ...Spectrum+3Hi all, Got my Spectrum+3 from eBay this afternoon. Powered it up to find the drive belt is a no go. So I need a drive belt, Ok easy to get hold of n…
... SMD-380 This is a +5V
2 Citizen OSDA ... -20E also +5V
They as far ...Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …
... pin to be tied to +5V (so the EPROM is not ...Voltage SchmoltageOk then. Don't flame for wanting to use a C64 tape deck for this - it was the only one I have to hand which may be cannibalised for the purpose. So …
Do you reckon it would be OK to just use 5v there too?
Because that would of course be the easiest solution. but in that case I suppose the commodores would just use 5v too.
Maybe I can get some 5v motor from somewhere . . .Voltage SchmoltageOk then. Don't flame for wanting to use a C64 tape deck for this - it was the only one I have to hand which may be cannibalised for the purpose. So …
You're right, the USB allows only 500mA to be drawn at a time.
Looks like i'll be using a line from the PSU, seeing if only 5v will suffice.Voltage SchmoltageOk then. Don't flame for wanting to use a C64 tape deck for this - it was the only one I have to hand which may be cannibalised for the purpose. So …
Eprom blowerdoes anyone know a site with plans for an eprom programmer project that'll blow 27C256s. I attempted to build one called Kisseprom, but the software …
... itself. There are 12V and 5V flashes. Both have WR pin ...Voltage SchmoltageOk then. Don't flame for wanting to use a C64 tape deck for this - it was the only one I have to hand which may be cannibalised for the purpose. So …
... and 18v) and outputs regulated 5v (or with this diode mod ...External Speccy CommunicationHow does a speccy communicate with the outside world ?? Do you have to have the interface 1 for serial communications ( rs232 ) or are there other p…
... module. Besides cheap, it is 5v and 8 bit friendly, and ...