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Is This PSU Useable on the Speccy?I just got my Speccy and the PSU has had some 'work' done to it. Somebody has added an extra length of cable on it but rather than soldering or crim…
... , a diode bridge and smoothing capacitor is never exact. It also ... -
Is This PSU Useable on the Speccy?I just got my Speccy and the PSU has had some 'work' done to it. Somebody has added an extra length of cable on it but rather than soldering or crim…
... , but a waveform where the capacitor will discharge according to the ... a nice graph under the Capacitor tread that shows the voltage ... waveform over the capacitor under load.
[URL ... -
Is This PSU Useable on the Speccy?I just got my Speccy and the PSU has had some 'work' done to it. Somebody has added an extra length of cable on it but rather than soldering or crim…
... multimeter. The value of the capacitor will also play a big ... -
ZX Spectrum Microvision - REAL retro setup!Some fun pictures. In reality the picture looks some better and more readible, but the camera doesn't pick it up well. [IMG]http://benophetinternet.…
... PCB dc input connector and capacitor[/URL] by [URL="http://www ... -
Yet another glitchy graphics 48kHeyo, I'm new both to the forums (sorry if this is the wrong forum) and to Spectra I'm afraid, picked up a 48k from a steam fair sale thingy (not th…
... check the voltages, replace any capacitor that looks remotely dodgy, and ... -
Yet another glitchy graphics 48kHeyo, I'm new both to the forums (sorry if this is the wrong forum) and to Spectra I'm afraid, picked up a 48k from a steam fair sale thingy (not th…
... do remember checking the related capacitor voltages as per the service ... -
Alphacom 32/Timex 2040 PrinterHello again, Having resurrected my ZX Printer, I have now turned to an Alphacom 32 that is not working. However, I am completely in the dark with th…
... . Often this is a bad capacitor being used as a filter ... -
Replacing Axial Caps with Radial CapsMany of the WOS members have complained of how difficult is it to get hold of Axial Capacitors when they want to replace the electrolytic capacitors …
... one of wires over the capacitor. It works as long as ... the capacitor is small (nowadays even large ... -
Cascading transistorsMiguel (mcleod_ideafix) alerted me on an aspect of a design I'm working on where I am cascading transistors, which may give problems. This is the par…
... to drain from the reset capacitor (present in the Spectrum circuit ... -
Cascading transistorsMiguel (mcleod_ideafix) alerted me on an aspect of a design I'm working on where I am cascading transistors, which may give problems. This is the par…
... on the ESR of the capacitor used in the Spectrum (not ... -
Cascading transistorsMiguel (mcleod_ideafix) alerted me on an aspect of a design I'm working on where I am cascading transistors, which may give problems. This is the par…
... amount of energy in that capacitor is pretty damned small and ... -
Cascading transistorsMiguel (mcleod_ideafix) alerted me on an aspect of a design I'm working on where I am cascading transistors, which may give problems. This is the par…
... allow the current from the capacitor to drain through the microcontroller ... the charge stored in the capacitor of the reset cell inside ... -
Cascading transistorsMiguel (mcleod_ideafix) alerted me on an aspect of a design I'm working on where I am cascading transistors, which may give problems. This is the par…
... allow the current from the capacitor to drain through the microcontroller ... -
Cascading transistorsMiguel (mcleod_ideafix) alerted me on an aspect of a design I'm working on where I am cascading transistors, which may give problems. This is the par…
... allow the current from the capacitor to drain through the microcontroller ... some miliseconds (to allow the capacitor to discharge and present a ... the pin is low, the capacitor is discharging through the microcontroller ... -
Interface 1 bisOk, well the postmans just been and brought with him my new arrival, the Interface 1 bis. So as promised I thought I'd share some initial usage exper…
... board, fitted with a tank capacitor and extensively tested. It is ... -
Cascading transistorsMiguel (mcleod_ideafix) alerted me on an aspect of a design I'm working on where I am cascading transistors, which may give problems. This is the par…
... some miliseconds (to allow the capacitor to discharge and present a ... the pin is low, the capacitor is discharging through the microcontroller ... -
Cascading transistorsMiguel (mcleod_ideafix) alerted me on an aspect of a design I'm working on where I am cascading transistors, which may give problems. This is the par…
... some miliseconds (to allow the capacitor to discharge and present a ... the pin is low, the capacitor is discharging through the microcontroller ... -
Interface 1 bisOk, well the postmans just been and brought with him my new arrival, the Interface 1 bis. So as promised I thought I'd share some initial usage exper…
... board, fitted with a tank capacitor and extensively tested. It is ... -
Cascading transistorsMiguel (mcleod_ideafix) alerted me on an aspect of a design I'm working on where I am cascading transistors, which may give problems. This is the par…
... resistor starts charging the 1uF capacitor (my fault: it was not ... -
Cascading transistorsMiguel (mcleod_ideafix) alerted me on an aspect of a design I'm working on where I am cascading transistors, which may give problems. This is the par…
... resistor starts charging the 1uF capacitor (my fault: it was not ... -
PlusDlite prototype/first batch is here![IMG]http://benophetinternet.nl/hobby/vanmezelf/20130605_143221.jpg[/IMG] [IMG]http://benophetinternet.nl/hobby/vanmezelf/20130605_153930.jpg[/IMG] …
... ) in parallel with a 100nF capacitor may help, but to really ... in parallel with a 100nF capacitor. Of course, to be most ... -
questions about +2 grey soundI have plugged my +2 into the speakers I use for my PC but I get a background humming sound. If I rewind a tape the humming noise gets louder and its…
... the description of the resistor/capacitor sounds like a low pass ... -
Plus D Voltage Regulator OrientationHi, I?ve got a Plus D Disc Interface circuit board without case from a friend. Sadly he sends it to me without care for proper packaging. So it arr…
Maybe I'm wrong, but I'm a bit worried about the capacitor in the forelast picture.
It looks as if the positive lead is connected to ground and the negative lead is connected to a positive voltage? -
Plus D Voltage Regulator OrientationHi, I?ve got a Plus D Disc Interface circuit board without case from a friend. Sadly he sends it to me without care for proper packaging. So it arr…
Well spotted Knik, I get this impression too.
My +D does not have such capacitor. -
Poorly Issue One 16k spectrum diagnosis?Hello, everyone. :smile: I was lucky enough to buy an Issue One 16k rubber key the other week; I didn't know it was an Issue One till I opened it up…
... to replace one of the ceramic capacitors with a non-cosmetically ... -
Composite mod display problemI'm fairly ham-fisted with a soldering iron but I thought I'd have a crack at the composite mod on two of my 48K rubber keys, as I'd already opened o…
... a crack at the C25 capacitor replacement to begin with and ... -
A quick ZX Spectrum + restorationI bought a ZX Spectrum + the other day it was untested and in a state didnt cost me much and i had it today only to find the real state. Key 3 was al…
... down to a dry up capacitor. I replaced them all with ... -
A quick ZX Spectrum + restorationI bought a ZX Spectrum + the other day it was untested and in a state didnt cost me much and i had it today only to find the real state. Key 3 was al…
... down to a dry up capacitor. I replaced them all with ... -
Poorly Issue One 16k spectrum diagnosis?Hello, everyone. :smile: I was lucky enough to buy an Issue One 16k rubber key the other week; I didn't know it was an Issue One till I opened it up…
... variable resistors and a variable capacitor to tune the colour circuits ... .
the variable capacitor is to trim the frequency ... -
Poorly Issue One 16k spectrum diagnosis?Hello, everyone. :smile: I was lucky enough to buy an Issue One 16k rubber key the other week; I didn't know it was an Issue One till I opened it up…
... C8 until I get another capacitor kit in.
ii. During ... replaced C27 with a 1uF capacitor, but this was rated at ... replaced with an in-spec capacitor when the kit I have ...
