Search found 114 matches

Thanks for finding that LFSR taps table, that's pretty handy!

Couple things. I found an old post by blue_hell where he recommends XNOR instead of XOR. With XNOR, the dead state is all 1's, so when ...

I sketched up the LSFR [url=http://en.wikipedia.org/wiki/Linear_feedback_shift_register#Fibonacci_LFSRs]depicted here (wikipedia). Each of the 16-bits out (Q1-Q8 on each of IC1 and IC2) comprise the c ...

I use Molex 16-02-0114 (crimp terminal for AWG 24), which has a square profile, to build my jumpers. They fit a little better than the round ones but there are still longevity problems -- I think some ...

Regarding pin headers, I've tried a couple different models of Mill-Max machined pin headers, such as [url=http://www.mouser.com/ProductDetail/Mill-Max/801-43-064-10-002000/?qs=sGAEpiMZZMs%252bGHln7q6 ...

Nice writeup man, it looks great!

Step 3: wiring (power lines and short connections)
Nice-looking perf work!

I was working on a kind of similar project myself earlier this year. I wanted a very modular Lunetta-style logic lab, with 3.5mm I/O compatible with Eurorack.

I designed a series of PCBs and then s ...

That's an interesting point about electrolytic leakage currents. I've noticed that 10uF electrolytic is about the biggest size I've been able to use (on +12V supply) but I was never sure why. I normal ...

Good news!

I made a similar kind of module, posted the schematic in this other thread:
http://electro-music.com/forum/post-386912.html#386912

Maybe interesting to you (or maybe too complex).

I spent a few hours poring over the service manual and some related datasheets to produce the following image of the Casio SK-1 PCB. In the image I have labeled all of the unique pins from the RAM/ROM ...

[url=http://phlake.org/erthenvar.lbr]Here's mine. It uses slots on the milling layer, and is compatible with both the Erthenvar (QingPu) footprint as well as Kobiconn.

The module has four momentary switches, so it outputs a gate when you press (and hold) a momentary switch. I use the flipflops to hold state so that instead when you press a momentary switch, the outp ...

This is an extremely simplistic example, but I used the 4013 to create latching pushbuttons in a module I called "manual gate".

This is a very cool circuit... I should try it out. The possibilities are interesting.

You could also gate your signal with an AND/NAND gate. If your signal is S and your gate G, then when G is high, G AND S will output S (meanwhile, G NAND S will output (NOT S) when G is low). With a s ...

That's an interesting implementation! Thanks for sharing!

But barking dogs playing jingle bells is the whole point!

Awesome!

Care to elaborate on what bends you incorporated?

Using a shift register like a BBD is clever. Good idea!

I can't think of a good reason within a modular, but perhaps if interfacing with external devices then a 5V gate would be useful.

For PIC inputs, I usually put a 1k resistor between in the pin and the input, and have schottky diodes going to +5V and ground in parallel with the pin. In general, schottky's act faster than zeners. ...

You may not need a Schmidtt trigger on the inputs, in which case you maybe could reduce parts count by using transistor buffers for the input network.

For example, is a Schmidtt trigger... still l ...

Yeah that's a buffer. I'm not sure what the trade-offs are between a transistor and an opamp in this application. No DC offset should be added, though (no VRef).

Edit, from an EE friend: "Eith ...

It's bad practice to rely on the internal buffers because they can only source limited current. This is fine for CMOS-to-CMOS connections, but in a modular synth context you can't be sure where the ou ...

Author	Message
Topic: easiest 3-bit random binary number generator?
corex Replies: 13 Views: 13879	Posted: Thu Sep 18, 2014 8:05 pm Subject: easiest 3-bit random binary number generator? Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
corex Replies: 13 Views: 13879	Thanks for finding that LFSR taps table, that's pretty handy! Couple things. I found an old post by blue_hell where he recommends XNOR instead of XOR. With XNOR, the dead state is all 1's, so when ...
Topic: easiest 3-bit random binary number generator?
corex Replies: 13 Views: 13879	Posted: Wed Sep 17, 2014 9:51 pm Subject: easiest 3-bit random binary number generator? Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
corex Replies: 13 Views: 13879	I sketched up the LSFR [url=http://en.wikipedia.org/wiki/Linear_feedback_shift_register#Fibonacci_LFSRs]depicted here (wikipedia). Each of the 16-bits out (Q1-Q8 on each of IC1 and IC2) comprise the c ...
Topic: Lunetta-Lab board
corex Replies: 50 Views: 44996	Posted: Tue Sep 09, 2014 1:09 pm Subject: Lunetta-Lab board Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
corex Replies: 50 Views: 44996	I use Molex 16-02-0114 (crimp terminal for AWG 24), which has a square profile, to build my jumpers. They fit a little better than the round ones but there are still longevity problems -- I think some ...
Topic: Lunetta-Lab board
corex Replies: 50 Views: 44996	Posted: Sat Sep 06, 2014 7:29 pm Subject: Lunetta-Lab board Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
corex Replies: 50 Views: 44996	Regarding pin headers, I've tried a couple different models of Mill-Max machined pin headers, such as [url=http://www.mouser.com/ProductDetail/Mill-Max/801-43-064-10-002000/?qs=sGAEpiMZZMs%252bGHln7q6 ...
Topic: Lunetta-Lab board
corex Replies: 50 Views: 44996	Posted: Sun Aug 31, 2014 3:19 pm Subject: Lunetta-Lab board Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
corex Replies: 50 Views: 44996	Nice writeup man, it looks great!
Topic: Lunetta-Lab board
corex Replies: 50 Views: 44996	Posted: Tue Aug 19, 2014 5:56 pm Subject: Lunetta-Lab board Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
corex Replies: 50 Views: 44996	Step 3: wiring (power lines and short connections) Nice-looking perf work!
Topic: Lunetta-Lab board
corex Replies: 50 Views: 44996	Posted: Wed Aug 13, 2014 10:54 am Subject: Lunetta-Lab board Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
corex Replies: 50 Views: 44996	I was working on a kind of similar project myself earlier this year. I wanted a very modular Lunetta-style logic lab, with 3.5mm I/O compatible with Eurorack. I designed a series of PCBs and then s ...
Topic: 40106 oscillator module build - help please
corex Replies: 12 Views: 10096	Posted: Fri May 23, 2014 12:45 pm Subject: 40106 oscillator module build - help please Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
corex Replies: 12 Views: 10096	That's an interesting point about electrolytic leakage currents. I've noticed that 10uF electrolytic is about the biggest size I've been able to use (on +12V supply) but I was never sure why. I normal ...
Topic: where did THE SOUND OF LOGIC forum/DEATHLEHEM.COM go????
corex Replies: 38 Views: 29140	Posted: Sat Feb 22, 2014 3:17 pm Subject: where did THE SOUND OF LOGIC forum/DEATHLEHEM.COM go???? Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
corex Replies: 38 Views: 29140	Good news!
Topic: manual gate
corex Replies: 5 Views: 2169	Posted: Mon Oct 28, 2013 3:51 pm Subject: manual gate Forum: DIY Hardware and Software
corex Replies: 5 Views: 2169	I made a similar kind of module, posted the schematic in this other thread: http://electro-music.com/forum/post-386912.html#386912 Maybe interesting to you (or maybe too complex).
Topic: SK-1 PCB labels
corex Replies: 1 Views: 4370	Posted: Sun Sep 01, 2013 3:07 pm Subject: SK-1 PCB labels Forum: DIY Hardware and Software » Circuit Bending
corex Replies: 1 Views: 4370	I spent a few hours poring over the service manual and some related datasheets to produce the following image of the Casio SK-1 PCB. In the image I have labeled all of the unique pins from the RAM/ROM ...
Topic: Erthenvar sockets -eagle cad part
corex Replies: 2 Views: 1785	Posted: Fri Aug 02, 2013 12:30 pm Subject: Erthenvar sockets -eagle cad part Forum: DIY Hardware and Software
corex Replies: 2 Views: 1785	[url=http://phlake.org/erthenvar.lbr]Here's mine. It uses slots on the milling layer, and is compatible with both the Erthenvar (QingPu) footprint as well as Kobiconn.
Topic: Found a bunch of 4013 chips
corex Replies: 6 Views: 6575	Posted: Sat Jul 06, 2013 10:27 am Subject: Found a bunch of 4013 chips Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
corex Replies: 6 Views: 6575	The module has four momentary switches, so it outputs a gate when you press (and hold) a momentary switch. I use the flipflops to hold state so that instead when you press a momentary switch, the outp ...
Topic: Found a bunch of 4013 chips
corex Replies: 6 Views: 6575	Posted: Fri Jul 05, 2013 12:30 pm Subject: Found a bunch of 4013 chips Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
corex Replies: 6 Views: 6575	This is an extremely simplistic example, but I used the 4013 to create latching pushbuttons in a module I called "manual gate".
Topic: Multifaceted response curve from linear CV
corex Replies: 9 Views: 4704	Posted: Wed Apr 17, 2013 4:52 pm Subject: Multifaceted response curve from linear CV Forum: DIY Hardware and Software
corex Replies: 9 Views: 4704	This is a very cool circuit... I should try it out. The possibilities are interesting.
Topic: Wanting short tones from 40106
corex Replies: 4 Views: 5245	Posted: Mon Apr 15, 2013 3:14 pm Subject: Wanting short tones from 40106 Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
corex Replies: 4 Views: 5245	You could also gate your signal with an AND/NAND gate. If your signal is S and your gate G, then when G is high, G AND S will output S (meanwhile, G NAND S will output (NOT S) when G is low). With a s ...
Topic: Microcassette (dictaphone) Tape Delay
corex Replies: 12 Views: 5649	Posted: Fri Mar 29, 2013 1:56 pm Subject: Microcassette (dictaphone) Tape Delay Forum: DIY Hardware and Software
corex Replies: 12 Views: 5649	That's an interesting implementation! Thanks for sharing!
Topic: Virgin Bend (sk-5)
corex Replies: 3 Views: 4630	Posted: Mon Mar 11, 2013 4:41 pm Subject: Virgin Bend (sk-5) Forum: DIY Hardware and Software » Circuit Bending
corex Replies: 3 Views: 4630	But barking dogs playing jingle bells is the whole point!
Topic: Virgin Bend (sk-5)
corex Replies: 3 Views: 4630	Posted: Fri Mar 08, 2013 5:59 pm Subject: Virgin Bend (sk-5) Forum: DIY Hardware and Software » Circuit Bending
corex Replies: 3 Views: 4630	Awesome! Care to elaborate on what bends you incorporated?
Topic: Lunetta Reverb Circuit
corex Replies: 12 Views: 18716	Posted: Tue Feb 26, 2013 2:07 pm Subject: Lunetta Reverb Circuit Forum: DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
corex Replies: 12 Views: 18716	Using a shift register like a BBD is clever. Good idea!
Topic: Gate or Trigger Levels
corex Replies: 5 Views: 2372	Posted: Fri Feb 08, 2013 2:43 pm Subject: Gate or Trigger Levels Forum: DIY Hardware and Software
corex Replies: 5 Views: 2372	I can't think of a good reason within a modular, but perhaps if interfacing with external devices then a 5V gate would be useful.
Topic: Help needed. Buffered output on CMOS / PIC?
corex Replies: 18 Views: 7145	Posted: Tue Jan 22, 2013 1:41 pm Subject: Help needed. Buffered output on CMOS / PIC? Forum: DIY Hardware and Software
corex Replies: 18 Views: 7145	For PIC inputs, I usually put a 1k resistor between in the pin and the input, and have schottky diodes going to +5V and ground in parallel with the pin. In general, schottky's act faster than zeners. ...
Topic: Help needed. Buffered output on CMOS / PIC?
corex Replies: 18 Views: 7145	Posted: Mon Jan 21, 2013 7:53 pm Subject: Help needed. Buffered output on CMOS / PIC? Forum: DIY Hardware and Software
corex Replies: 18 Views: 7145	You may not need a Schmidtt trigger on the inputs, in which case you maybe could reduce parts count by using transistor buffers for the input network. For example, is a Schmidtt trigger... still l ...
Topic: Help needed. Buffered output on CMOS / PIC?
corex Replies: 18 Views: 7145	Posted: Mon Jan 21, 2013 10:26 am Subject: Help needed. Buffered output on CMOS / PIC? Forum: DIY Hardware and Software
corex Replies: 18 Views: 7145	Yeah that's a buffer. I'm not sure what the trade-offs are between a transistor and an opamp in this application. No DC offset should be added, though (no VRef). Edit, from an EE friend: "Eith ...
Topic: Help needed. Buffered output on CMOS / PIC?
corex Replies: 18 Views: 7145	Posted: Sun Jan 20, 2013 12:36 pm Subject: Help needed. Buffered output on CMOS / PIC? Forum: DIY Hardware and Software
corex Replies: 18 Views: 7145	It's bad practice to rely on the internal buffers because they can only source limited current. This is fine for CMOS-to-CMOS connections, but in a modular synth context you can't be sure where the ou ...