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My biggest, most complex PCB design so far. This is the excitation section of the vocoder and includes two oscillators, a noise source, a mixer, precision rectifier, low pass filter and an analogue switch. I've introduced a ribbon cable connector which will distribute signals into and out of the 28 bandpass filter circuits.
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My biggest, most complex PCB design so far. This is the excitation section of the vocoder and includes two oscillators, a noise source, a mixer, precision rectifier, low pass filter and an analogue switch. I've introduced a ribbon cable connector which will distribute signals into and out of the 28 bandpass filter circuits.
When I saw that double row of holes for the pots the first thing that came to mind was dual pots, with concentric shafts. I suppose that you could do it that way and save on panel space, but I find those sort of things awkward to operate…
I hope you didn't crash the ground plane but I hope that you were able to sort out that ground plane crash problem, I wonder why you didn't include a quadrature sampling mixer for generating some weird sounds.
Thats one busy pcb im sure that took a while to lay out. Would have taken me ages lol. There must be quite a bit of time spent just lining things up in this project?. Its great that we can just lay these boards out in software now and in a fiew days they drop through the door ready to build. Saves all the messing about etching this sort of stuff your self. It looks much more professional and cheaper too.
Do you have an ebay link for the containers you had all of those resistors in?
Isn't that the best place to get great quality PCB's!?! I have designed and made so many through them.
I'm loving the high pitch audio during your time lapse footage.
Does anyone remember Morph from Tony Heart's art show?
Why did you get it in green? I feel that green solder masks alwashhdgjhfgxxxxxcrfbbbbbhtsjg kbskyulu uggly.
Either you making a new toy for Deadmau5, a sonic death machine or you have neighbours that play load music and your getting your own back.
Nice board Julian- it's coming along!
Although I've been involved with it for all of my life, I'm wondering these days, what the point of it is.
OK, if you've never made a 'thingy that does this' before, then you will be excited, but this is an audio generator. I have way more capability on my iPad!
Basically, electronics for the ordinary guy is dead, because you then have to go the modern route of using libraries and pre-assembled parts, but this type of project is the only one that can offer you even a hope of doing something that is practically useful with electronics and not just a curio.
I just bought a spot-welder project that a guy was making – excellent project. But there aren't so many things that are simple enough for a single, ordinary person to do. I'd say maybe doorbells, but I just got one last month that does everything that I need and about a thousand things that I'll never use. The humble battery, switch and bell is still the pinnacle of cost-benefit implementation, but the next step up cost me only three times as much as the transformer, wire, push button and bell, but gave me ten times the functions. Moreover, because it is all Bluetooth and WiFi, I don't have to run wires everywhere, so actually, the new one would be cheaper!
It's the same with simple things. I was considering making an intercom – like the ones that we could buy in the 1960s and 70s. I sat down and began gluing transistors, caps and diodes together (on-screen) and very soon realised that the cheap, eBay digital amps were a much better buy – you see, I didn't really need any expertise, they do it all on one, tiny PCB, and I'm struggling to see where hobby electronics (as opposed to mechatronics) is still relevant today.
A guy that I know owns a secondhand shop and he sells a lot of LCD TVs. He used to come to me to see if I could get them working. It was the PSU in 99% of cases and I could fix them in about 15-20 mins. I haven't done one in over two years. The manufacturers have learned and now the faults no longer come with the same frequency and in many cases, as the product life is now so short, there aren't the spares out there, and so it becomes uneconomical.
It is becoming a game of procurement, not a game of electronic engineering, but I can see why.
Today on Hartbeat… Morph [sounds like him anyway].
2k vs 2k2
Do you figure the "newer" ones are actually +/-5% as they are implying with the E24 value of 2k? I assumed most pots are +/-10% and therefore the focus on E12 values. Pots don't exactly work within the standard EIA values table ideology anyways. The tolerance is intended to overlap the range potentially providing every linear resistance value possible if someone has a large and complete collection of the entire range of resistor values. I don't see any value in the bell curve range of pots. I thought the use of E12 values was simply a nod to the tolerance values inherent to the EIA standard. So is the 2k value a furtherance of the system or a dilution of the standard?
the lower/underboard pots don't need a daughterboard, just wires,
the four upper pots will carry the pcb.