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DivIDE HelpHi all, After a rather long wait my DivIDE from Papaya labs arrived. I connected it to my spectrum, turned it on and...nothing. The green power LED…
... 5v side via a 7805 regulator (the usual 7805 circuit, the regulator ... -
Of soldering and whatnot.So. It looks like if I'm going to have any sort of active retrogaming habit in the future, I need to learn a bit more about the nuts and bolts. Emula…
... 555 timer ICs.
- A 7805 voltage regulator, and simple wall ... around the house already). The 7805 will give you the 5 ... -
I killed my SpectrumMy room was a mass of leads.... and I plugged my NES transformer into my ZX Spectrum +2 accidently, frying it :cry: , am I screwed? or is there somet…
If you're lucky, you only fried the 7805 regulator which is very cheap and common. -
+12v/-12v/9v and peripherals?Do any peripherals use the +12v, -12v or 9v lines exposed at the edge connector? Firstly, if they use +9v they won't work on a +3, since the +3 does…
... line to not overload the 7805.
Most of those ... -
True Spectrum laptop (no emulation)[url]http://user.tninet.se/~vjz762w/[/url] Hi All, I have build a speccy laptop, battery part is not ready yet.... I did it on 2 days, I will put s…
... be a combination of the 7805 + your reg, or all in ... is intending to replace the 7805 with a switch mode regulator ... -
True Spectrum laptop (no emulation)[url]http://user.tninet.se/~vjz762w/[/url] Hi All, I have build a speccy laptop, battery part is not ready yet.... I did it on 2 days, I will put s…
... be a combination of the 7805 + your reg, or all in ... the heat output of the 7805. When running off the 9v ... is intending to replace the 7805 with a switch mode regulator ... -
"Upgraded" broadbandTo cut a long story short, I have just had my broadband speed upgraded from 1meg to 5meg (it was free). Having just spent over an hour setting up the…
... broadband router. Even a humble 7805 linear regulator circuit will do ... -
Is it possible to use external power supply for +-12; +-5 for ZX SpectrumRecently I acquired a damaged Sinclair ZX Spectrum, issue 3B. According to the maintenance manual I have to replace TR4 and TR5. These type of transi…
... "]
[CODE] ____
([U]7805[/U]) (Upper- right corner of ... -
Is it possible to use external power supply for +-12; +-5 for ZX SpectrumRecently I acquired a damaged Sinclair ZX Spectrum, issue 3B. According to the maintenance manual I have to replace TR4 and TR5. These type of transi…
... smoke went out of the 7805. I replaced it, then I ... -
Is it possible to use external power supply for +-12; +-5 for ZX SpectrumRecently I acquired a damaged Sinclair ZX Spectrum, issue 3B. According to the maintenance manual I have to replace TR4 and TR5. These type of transi…
... magic smoke out of another 7805. There's something else broken ... -
Is it possible to use external power supply for +-12; +-5 for ZX SpectrumRecently I acquired a damaged Sinclair ZX Spectrum, issue 3B. According to the maintenance manual I have to replace TR4 and TR5. These type of transi…
... supply.[/QUOTE]
When 7805 went dead, I was ... smoke out of another 7805. There's something else ... gets warm, even the 7805 stays quite cold (I ... rightmost terminal of the 7805 and connect it to ... EARTH[/B][/COLOR] of the 7805 (middle terminal). The outside ... -
PSU queryHi all, just one quick question. Are Spectrum PSU's compatible with ZX81's? I've just bought an '81 off of Ebay, which was sold as "working, but the …
... supply. It uses a standard 7805 regulator for this which requires ... -
+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 …
... drop-out voltage of the 7805 regulator in the Spectrum. If ... drop out voltage of a 7805 is something like 7 volts ... -
+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 …
... cap is used) and the 7805 can handle up to a ... -
128k heat sink - ULA problems and a hintHello, I had two ZX Spectrum 128k with a similar behaviour. One item worked only a short time after switching on and then there were increasing RAM …
... warm anyway.
A 7805 regulator shuts down when it ... /datasheets_pdf/7/8/0/5/7805.shtml[/url] ) the output and ... the output current from a 7805 regulator using a TIP3055 power ... -
128k heat sink - ULA problems and a hintHello, I had two ZX Spectrum 128k with a similar behaviour. One item worked only a short time after switching on and then there were increasing RAM …
... just a matter of the 7805 regulator then all he has ... -
128k heat sink - ULA problems and a hintHello, I had two ZX Spectrum 128k with a similar behaviour. One item worked only a short time after switching on and then there were increasing RAM …
... of heat in that little 7805 regulator) and you're ... to replace things like the 7805) which are vastly more ... efficiency out of a loaded 7805, they can be pushing ... just dropping in a new 7805 though.
... good replacement for the 7805 if you're drawing ... -
128k heat sink - ULA problems and a hintHello, I had two ZX Spectrum 128k with a similar behaviour. One item worked only a short time after switching on and then there were increasing RAM …
... to replace things like the 7805) which are vastly more efficient ... % efficiency out of a loaded 7805, they can be pushing something ... just dropping in a new 7805 though.
National Semi ... warm anyway.
A 7805 regulator shuts down when it ... -
128k heat sink - ULA problems and a hintHello, I had two ZX Spectrum 128k with a similar behaviour. One item worked only a short time after switching on and then there were increasing RAM …
... fits the footprint of the 7805, but I would have to ... anything more than desoldering the 7805 and soldering a 3 pin ... -
128k heat sink - ULA problems and a hintHello, I had two ZX Spectrum 128k with a similar behaviour. One item worked only a short time after switching on and then there were increasing RAM …
... /> Place an additional 5V regulator (7805) inside the divIDE+ case with ... -
128k heat sink - ULA problems and a hintHello, I had two ZX Spectrum 128k with a similar behaviour. One item worked only a short time after switching on and then there were increasing RAM …
... is pin compatible with standard 7805. Maybe is little bit more ... -
128k heat sink - ULA problems and a hintHello, I had two ZX Spectrum 128k with a similar behaviour. One item worked only a short time after switching on and then there were increasing RAM …
... a good replacement for the 7805 if you're drawing current ... -
R.I.P. spectrum 48kRecently one of my 48k rubber key (issue 4) machine bit the dust the other day when I tried to power it on. When powering it on, it gave a weird 'bee…
... be used instead of the 7805 type (to reduce the heat ... -
R.I.P. spectrum 48kRecently one of my 48k rubber key (issue 4) machine bit the dust the other day when I tried to power it on. When powering it on, it gave a weird 'bee…
... producing less heat.
The 7805 regulator can usually accept input ... -
R.I.P. spectrum 48kRecently one of my 48k rubber key (issue 4) machine bit the dust the other day when I tried to power it on. When powering it on, it gave a weird 'bee…
... producing less heat.
The 7805 regulator can usually accept input ... -
New Guy Wants Speccy - SWAP !Hi, I`m new here so here is a little background info ! I always had a C64 when I was in my teens in the 80`s, my friends had Spectrums, so it was alw…
... of the semiconductors, including the 7805, the ZTX transistors, Z80, ROM ... -
Issue 2 Spectrum overheating keyboard membraneI think I have an issue 2 ZX Spectrum. I don't want to take it apart again as I had problems replacing the keyboard membrane. With Interface 1 conne…
... the later issues). Replacing the 7805 regulator with a more modern ... run the input to the 7805 regulator through a (suitably rated ... -
Issue 2 Spectrum overheating keyboard membraneI think I have an issue 2 ZX Spectrum. I don't want to take it apart again as I had problems replacing the keyboard membrane. With Interface 1 conne…
... run the input to the 7805 regulator through a (suitably rated ... />
This will allow the 7805 to run cooler, but the ... you took away from the 7805 inside the same plastic case ... the PCB holes where the 7805 used to be. -
sinclair zx spectrum issue 6a (again) - how to repairHi All, Is there someone who may explain what these jumpers can be used for. [url]http://forest.no-ip.org/repair/jumpers.gif[/url] <- this is from …
... issue 3b, replacing just the 7805 and tr4, it just booted ... /> Symptoms: No buzz from coil, 7805 reads good voltages but ram ...
