I do know basic components, but have trouble "mapping" this diagram to the circuit board components and traces for some reason. I wonder if it's related to my horrible sense of direction.1024MAK wrote:But first, search the internet, or use a library if you have one to learn about some basic electronics. You do not need to read and understand all the maths and theory, just learn about the different types of component and get an idea what they look like, the symbols and figures used on schematic diagrams, and their basic functions.
When I sort out some other hardware issues I will get back to these, and separate the power from the other innards as suggested. I should be able to figure that out. I think I have all the required parts, except maybe the coil. Hmmm, could it,... naaaw.
I actually have some 4116's that I tested in my good pack, although I don't remember where I got them, so if I get voltages righted and it turns out the chips are bad, I can repopulate a corrected unit.
I am doing internal memory mods at the same time. I know full well the many shortcomings of these wobbly little black boxes. Perhaps that's why I romantically want to get some working again. Although, I found that tinning the motherboard bus with a thin layer of solder eliminates 90% of the wobble crashes. That was a tip from The Explorers' Guide I took to heart. Then too, there's the ZXpand. Why do I really need any of this when there's that kick-ass tool? I don't really need any of these darn 1016's to work, it's purely a,... well,... I guess they call it OCD.RetroTechie wrote:One a side note: why go through all that trouble when internal RAM expansion is so easy? (and avoids RAM pack wobble).
The third front is composite video. The 1 transistor ZXTeam mod isn't working well enough for any of my TVs, and other contraptions are pretty intense. I'd like a 4 or 8 component version I could make a small handful of. I've read threads here and elsewhere, but you guys are using a different TV system across the pond. The Timex was never taken seriously on this side. Many were sold, but quickly abandoned because other machines were available by then. The "early" fans like me all have imported ZX81's.
I digress. Cheers,