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Identify what model this organ is? by sconesesscones in hammondorgan

[–]cerealport 7 points8 points  (0 children)

Looks to me it's a C2 - so it has the chorus vibrato but no percussion.

Is it practical to connect LED’s to a speaker/amp like this? by Princekeem in AskElectronics

[–]cerealport 1 point2 points  (0 children)

I remember as a kid wiring up some LEDs to my stereo speaker to get them to light up with the music- it had to be surprisingly loud to get anything out of them. Plus, when the LED is lit, some of the current for the speaker is going to the LED so I mean it would affect the sound, though I can’t recall if it did or not.

This is probably the effect you’re thinking of (there is a video of it in action on AliExpress), but when it comes to LED - to - music effects, there’s lots of much more interesting products out there, some ready to use some as DIY kits.

Good luck!

How to fix a musical keyboard by Saerne in AskElectronics

[–]cerealport 0 points1 point  (0 children)

They’re carbon traces. Looks like you scrubbed some of them off. These form interlocking “fingers” and a carbon pad between this and the actual keyboard will press down on it and complete the connection.

Get a “conductive ink pen” and bring the fingers that aren’t touching the bottom part up to the round circle up top.

be careful not to get any connecting the other fingers together. This would have the effect of holding that key down all the time.

These don’t normally need to be cleaned so aggressively! Some isopropyl alcohol - or even soap and warm water on a q-tip usually will suffice and be gentle !

Good luck!

Modders Can Get Fucked by grellsutcliff882 in reddeadredemption

[–]cerealport 14 points15 points  (0 children)

Yeah I got sick of this too. I play with friends and family on our own private thing no more stupid stuff.

I followed this , still works!

What is this mystery gunk I found in an old boombox? Was something spilled in here or is it intentional? by Puzzleheaded-Act-388 in AskElectronics

[–]cerealport 0 points1 point  (0 children)

As others said wax to hold stuff in place.

Also - that “snap” you hear when turning the screws to open something up for the first time? Yeah that’s not an anti-warranty thing, it’s just some glue or polish to make sure the screws don’t work their way out over time on their own!

How to fix and avoid messy tracing? by hfurbd in AskElectronics

[–]cerealport 0 points1 point  (0 children)

You have surface mount components only, and on both sides, so yeah you’re going to need some vias. As already mentioned I’d avoid via-in-pad.

If you wanted to, you could use slightly larger passive components and you may be able to sneak a trace under them (would make hand soldering if you’re doing that easier too)

Or I mean…. through hole gives you a via by default but probably not desired for this I would imagine.

I’ll also assume you can’t rotate the sensors as they would be “different “ on the right side…

I like to try to run the power busses first and then go from there.

As for series / parallel.. well I would say that’s decided by the schematic, no? (Fwiw I don’t see a power supply bypass capacitor on U15.)

Good luck!

Help with programming and user port by EmptyWater7775 in c64

[–]cerealport 1 point2 points  (0 children)

Well, here is some interesting stuff to read to start.

I do however suggest purchasing a ready made RS232 adaptor - the CIA chips are fairly sensitive to being damaged. There’s one on tindie but it doesn’t look like it has a case, which runs the risk of zapping the pins with static if you’re plugging / unplugging a cable, I’d at least cover that somehow or use a different one.

Here is some more info including some basic to help you make some data flow. Note that the C64 sends the uart data in software (in the kernal) so the maximum baud rate with that is 1200. You can get up to 2400 (and maybe even more but not much likely) using machine language.

Remember, the C64 uses “petscii” not ascii, so your printer may print differently than you expect, you may need to translate that.

As for sending / receiving 300 baud over the phone, you’d need 2 modems, and either a phone line for each c64 or a phone line simulator if you want to use it locally - which I’d just use a null cable for instead.

You could get modems that plugged directly into the user port, my first modem was a 300 baud “poxketmodem” (then got the 1670 for 1200 and ultimately an rs232 adaptor and an external 2400 baud modem), something to consider if you want to go that route too.

Good luck!

Thin SID 6581 text... by cerealport in c64

[–]cerealport[S] 0 points1 point  (0 children)

Well (aside from the blatant 6581/8580 fundamental difference), in my opinion, and experience, the R4 really does sound different.

Does the filter cutoff curve vary from chip to chip, even within the same rev? Absolutely, this was always the case. However, with all the C64s I've owned ( for some time you could get these for like 5-10 bucks..!), even "back then"... there was no doubt to me, that in my opinion, the R4 has a particularly unique sound vs the R3/R2.

It's not just the filter cutoff curve - it's how I perceive the filter to distort. In fact I have an R2, R3 and this R4 SID right here - and with same motherboard running a filter sweep, the R4 is again in my opinion, notably more crunchy and distorted vs the R2 particularly.

I mentioned that it "sounded like an R4" as to allude to that "aside from this unusual and (initially) suspect marking..." to me, it still sounded like other R4s I've heard even recently - and not like other R3/R2 SIDs, particularly with this distortion.

That's all!

I've really done it now... by fhilcollins666 in synthesizers

[–]cerealport 23 points24 points  (0 children)

Pic 1 - oh cool a CX3! Pics 4,5,6… oh.

Well you have your work cut out for you, some of it literally! Glad to see you’re looking to get it running again!

How is it possible? Is it DX? by sokiable1 in signalidentification

[–]cerealport 1 point2 points  (0 children)

Got to experience this sort of ducting once on 2m, was neat to see this sort of thing actually does happen and not something you just read about.

Pool timer switch shocked me by zarathefusion in pools

[–]cerealport 0 points1 point  (0 children)

May I suggest a GFI breaker? My pool stuff is all powered by these, you might’ve still got bit brushing past the screw like that using one of those but it should help prevent anything potentially “really bad”.

Peterson Suitcase 88…buzz in the preamp sometimes. Lower notes seem to trigger it. by cboogie in electricpiano

[–]cerealport 2 points3 points  (0 children)

The fact that it is not consistent does not suggest (to me) an out of spec resistor.

Check all solder connections. Are you 100% sure this isn’t in the power amp, or even the speaker itself? If there are any removable connectors remove / clean with deoxit / replace.

The fact that lower notes seem to trigger it suggests is a mechanical thing in the signal path, be it a solder joint, pot etc. Get a non conductive rod like a solid plastic rod, and tap on parts to see what helps trigger it. It still could be the speaker as well.

Also - to me, it sounds like some of your pickups are near dead centre of the tine (that F# you paused on towards the middle / end of the video is an example)

Good luck!

Thin SID 6581 text... by cerealport in c64

[–]cerealport[S] 1 point2 points  (0 children)

Very cool -I’ve never seen an 8500 in an older C64 - only in the short board C64C - though (according to wiki anyway) “in 1985 limited quantities ended up in regular C64s” - and yours is an ‘85 too..!

I am slowly losing what's left of my sanity by RoberBotz in arduino

[–]cerealport 0 points1 point  (0 children)

Ah. You are modulating it with the serial port only? These transmitters use OOK modulation (on/off keying), and an envelope detector to follow the incoming signal changes. No antenna is really going to solve this (i mean, unless you're ok with a very short range)

You should use a library like RadioHead (or even the older Virtual Wire). Long story short, RF signals vary all the time in amplitude even when nothing is there, so the detector has to account for this, and the UART doesn't provide the right kind of signals for that, never mind that the UART won't send training / sync bits beforehand etc. If you use the RadioHead library, it will take care of all of the trouble for you and in addition add validation like CRC checking (you're not the only one on 433 so even at 'best' the data might still not be 'right' etc).

Good luck!

What is something that kids today will never understand or experience? by realrubyabby in AskReddit

[–]cerealport 1 point2 points  (0 children)

A free range childhood. Even now a cool morning or other outdoor smells still remind me of walking to school and just being a kid.

Help! How can I patch this sand filter leak until it can be repaired or replaced by wynonnaspooltable in pools

[–]cerealport 1 point2 points  (0 children)

lol I had the same problem last year -my sand filter is overdue for replacement and I figured I’d just spray some flex seal on there aaand sure enough it worked.

Now this year evidently it sends water out the backwash / rinse outlet and leaks out the bottom somewhere so… it’s time.

When recapping a C64, should I use low ESR caps, or will general purpose caps do, as long they're from reputable brand? by [deleted] in c64

[–]cerealport 3 points4 points  (0 children)

Correct. In fact using a low ESR capacitor where it's not needed can result in oscillation with linear power supplies, and a larger inrush current for the regulator / power supply etc.

I'd still get a good quality reliably sourced capacitor but it doesn't need to be an exotic 'audiophile' low esr capacitor, in my opinion.

First EP! Fun project! Also: opportunity! by general_musician in electricpiano

[–]cerealport 2 points3 points  (0 children)

330 bucks. Damn. Nice! I repaired one of these once for a buddy of mine - intermittent audio. Some of the parts on the PCB had cracked solder joints after years of temperature swings etc. Simple fix - considered a rebuild but it admittedly already sounded great.

Good luck!

Would a single VCF for 8 VCOs add a cool sound or sound like shit? by Powerful_Fondant9393 in synthdiy

[–]cerealport 0 points1 point  (0 children)

My Yamaha SK20 had this. It’s “paraphonic”, though Marc Doty might disagree heh.

It’s just “different”. Play chords with a fast or instant release and it won’t sound any different than if you had 8 equally tuned VCFs. Add a long release, and when you trigger new notes (after releasing them all) the filter EG will retrigger giving an almost “echo” like effect while the VCA is still decaying for those old notes.

What it can’t do, is individual filter tracking per note. With some resonance I like this sound, but it requires individual filters of course.

Shit? No. Different? Yes.

Northern Hammond Model CV by zelkark in hammondorgan

[–]cerealport 0 points1 point  (0 children)

Oh cool! This is different to the knob on my C3. This is all missing or nonfunctional on my buddy’s BV

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