https://electro-music.com/forum/ https://electro-music.com/forum/viewtopic.php?p=457773#457773 hageir Wed, 12 Nov 2025 15:20:06 -0700 https://electro-music.com/forum/viewtopic.php?p=455750#455750 I'm looking for any info on the variations on the original Synsonics.
Looks like the Pro model came out in 1984 and I saw I confusing print ad implying that Gretch had purchased the brand.
Mine (Model 5 3 81) does not have the MM5837 noise IC and i ... blakeAlbion Mon, 12 Aug 2024 06:00:49 -0700 https://electro-music.com/forum/viewtopic.php?p=454940#454940 https://lovemyswitches.com/rocket-sockets-pedal-building-socket-set/

Been using these for a few years now. Excellent tools. Return 2 sendeR Wed, 24 Jan 2024 09:55:44 -0700 https://electro-music.com/forum/viewtopic.php?p=451435#451435 Microprocessors are easier in the sense that it's easier to make adjustments and add functionality by just changing the code,
instead of having to add more components. And of course generally need less hardware to begin with.

Downside is that you ... PHOBoS Sat, 12 Mar 2022 16:38:22 -0700 https://electro-music.com/forum/viewtopic.php?p=450523#450523 Does anybody have a schematic for this or is anyone able to draw a quick schematic of the pitch bend part.
Around the jfet and transistor I just can't figure out what's going on.

Thanks muchlee. PiercedFaceMan Thu, 11 Nov 2021 19:30:00 -0700 https://electro-music.com/forum/viewtopic.php?p=450251#450251 Hi, everyone... I got a pss 460 from a friend, in immaculate condition, without any brand of use, however, it doesn't have any kind of sound...
It was kept for a long time... the speakers are perfect, and potentiometers too... all the commands where ... Stereokromatik Sat, 02 Oct 2021 08:11:23 -0700 https://electro-music.com/forum/viewtopic.php?p=448707#448707 Thanks so much! That's what it looked like, but I'm a newbie so I was a bit worried. kapachuchu Wed, 31 Mar 2021 14:03:30 -0700 https://electro-music.com/forum/viewtopic.php?p=448413#448413 that's great info about the waveforms. I've got one of those $15 DSOs which can't even manage high pitched audio waveforms, so it's useless for MHz+

The op amps on the chip are set up with the inverting input available to the outside world, and th ... Hashtag Octothorpe Tue, 09 Mar 2021 12:47:41 -0700 https://electro-music.com/forum/viewtopic.php?p=448396#448396 Wow! yeah, ok housecat's images do help a bit. His notes are a bit difficult to read but it's a really solid starting point, so thank you!

I also have a Suzuki Unisynth XG-1 FM guitar, but I'm probably going to sell it to someone with more capable ... atomforce80s Mon, 08 Mar 2021 13:57:59 -0700 https://electro-music.com/forum/viewtopic.php?p=447125#447125 Wondering if anyone out there as explored any circuits that have produced any interesting bass material? I know that the realm of circuit bending is heavy on the square waves but trying to find new ways of producing low frequency/sub audio, with the c ... liamkw Fri, 13 Nov 2020 00:30:38 -0700 https://electro-music.com/forum/viewtopic.php?p=447080#447080 Hello,

I have modified two radios, one to be used as a standalone snare type drum synth and one
that is utilized as a noise generator in a drum synthesizer.

The first one is an old tube radio. I added a piezo drumpad going to trigger conditi ... [zfgenerator] Sun, 08 Nov 2020 13:57:37 -0700 https://electro-music.com/forum/viewtopic.php?p=446524#446524 Hi, thanks. I am using coil springs that bounce on and off metal plates, so I can not really change these.
I was seeing in my experiments that a big cap seemed to be necessary. But what if I would use 5 or 9 volts and use a resistor to get it down t ... cburn Thu, 17 Sep 2020 15:56:29 -0700 https://electro-music.com/forum/viewtopic.php?p=445330#445330 It seems the APO signal has to do it .. so I'd trace that one to T8 and see where it differes from the working one. blue hell Tue, 23 Jun 2020 15:59:46 -0700 https://electro-music.com/forum/viewtopic.php?p=444879#444879 So, I realise this is an old thread, but what about the circuit below.

Note, I also want to switch between 3 different outputs (various filter outs) and mix in the drum signal.

at the moment (I haven't built this circuit) the 4 way switch create ... wax+wire Sun, 24 May 2020 03:54:23 -0700 https://electro-music.com/forum/viewtopic.php?p=444759#444759 Thanks for the replies guys, that really helped fill a couple of gaps in my knowledge base, I will definitely head in the voltage regulator direction. I have found a design based on the LM7805 which looks ideal. MatthewMachinist Tue, 19 May 2020 02:27:48 -0700 https://electro-music.com/forum/viewtopic.php?p=443810#443810
turns out it's something called a diode scanning network.

yep, and it is probably one of those most common techniques used if you have something with a lot of buttons/switches.
The CPU scans through the rows and columns to see if there are any ... PHOBoS Fri, 06 Mar 2020 11:14:35 -0700 https://electro-music.com/forum/viewtopic.php?p=443437#443437 Once I saw PHOBoS's reply, I had thought the same, since it's a toy it might want a smaller resistance due to being designed to drive a speaker. Good that it works now. JovianPyx Thu, 30 Jan 2020 15:19:39 -0700 https://electro-music.com/forum/viewtopic.php?p=443177#443177 Recently, I started working on an 8 step sequencer, that I had planned to use with 555/556 based oscillator circuits. It seems easy--the chips have a "control" pin.

From personal experience, there are two things you want to know about 555/556:
... JovianPyx Thu, 16 Jan 2020 09:51:24 -0700 https://electro-music.com/forum/viewtopic.php?p=443165#443165 hmm tricky,. it could be caused by inductive coupling, capacitive coupling, maybe the wires working as antennas picking up some other
electro-magnetic noise or a combination of all of them. Without knowing the exact cause it is going to be very hard ... PHOBoS Wed, 15 Jan 2020 09:37:08 -0700 https://electro-music.com/forum/viewtopic.php?p=443098#443098 It's from a children's book that has a simple audio device attached. All it does is play sounds when you press the buttons. It's very basic.

Yes, I did forget to use a current limiting resistor. That solved the problem. Thank you! southboundpachyderm Sat, 11 Jan 2020 23:31:08 -0700