They plug in here:
Links:
Muffs - cortex with 3ins
LZX
Muffs - discrete RGB output signals
......to be continued.
JonDent - Explorations in Electronics, Electronic Music, Coffee, Sci Fi, Art & Travel (but mostly electronic music)
Monday, 31 October 2016
3trinsRGB+1c to LZX
Some pics of the Gieskes video synth to LZX adapters I'm building.
They plug in here:
Links:
Muffs - cortex with 3ins
LZX
Muffs - discrete RGB output signals
......to be continued.
They plug in here:
Links:
Muffs - cortex with 3ins
LZX
Muffs - discrete RGB output signals
......to be continued.
Kaitlyn Aurelia Smith - coming to Australia
I believe Kaitlyn is bringing a Buchla 100.
Links
Kaityn A Smith's website
Sugarmountain festival
Mona Festival
Kaitlyn A Smith's Bandcamp
RedBull interview
Pitchfork interview
Madrona Interview
Thursday, 27 October 2016
NLC BaDum TISS - drum module
These are my build notes for the nonlinearcircuits Badum TISS.
Badum Tisss is a snare/hi hat eurorack module.
it mixes the sound from a VCO & noise circuit into a ring modulator.
it mixes the sound from a VCO & noise circuit into a ring modulator.
The VCO is triggered with an envelope follower.
This EF also triggers a VCA further down the circuit.
Check out Andrews build notes for further info.
http://www.sdiy.org/pinky/data/BadumTisss%20build%20&%20BOM.pdf
Sneaky Nuts??? s this a reference to Angry Boys?
Anyway, where did the name Ba Dum Tiss originate ?
The Urban Dictionary defines badum tish as
"an onomatopeia for a drum technique normally accompanying the conclusion of a cheesy joke or a comedy pratfall (where someone is made to look like an idiot by their own devising - such as falling on a banana skin they earlier discarded). It consists of two fast rimshots and a splash cymbal - producing the sound "badum tish".
Firstly, get those pesky SMD ICs out of the way:
Rest of SMD next.
Anyway, where did the name Ba Dum Tiss originate ?
The Urban Dictionary defines badum tish as
"an onomatopeia for a drum technique normally accompanying the conclusion of a cheesy joke or a comedy pratfall (where someone is made to look like an idiot by their own devising - such as falling on a banana skin they earlier discarded). It consists of two fast rimshots and a splash cymbal - producing the sound "badum tish".
Firstly, get those pesky SMD ICs out of the way:
Rest of SMD next.
one BC847 NPN (marked by the "n") & one BC 857 PNP (identified on the PCB by the "p")
Now for the through hole stuff.
Thanks Andrew.
-----------------------------------------------------------------------------------
You can find more NLC builds here.
---------------------------------------------------------------------------------------Kinkakuji (Golden Pavilion) - Kyoto, Japan
This is a Zen Buddhist temple in Kyoto, Japan.
The golden pavillion is so beautiful. It's part of a larger complex of buildings set in the most
Japanese of Japanese gardens.
Kinkaku-ji is officially named Rokuon-ji.
The site dates from 1397. It started off a a villa but was converted to the Kinkaku-ji complex
by the Shogun Ashikaga Yoshimitsu.
The Pavillion is very important to the Japanese. It is on the world heritage list and is
designated as a National Special Historic Site.
During the Onin war (1467–1477), all of the buildings in the complex aside from the pavilion were burned down. This golden pavillion remained in tact for nearly 500 years until 1950 when it was burned down by a 22-year-old novice monk,
Hayashi Yoken, who then attempted suicide on the Daimon-ji hill behind the building.
He survived and was jailed. He died of tuberculosis in 1955.
The temple has been rebuilt but one can only feel sadness for this lost of a national treasure and what pain it must have caused the Japanese People.
Japanese of Japanese gardens.
Address: 1 Kinkakujicho, Kita Ward, Kyoto, Kyoto Prefecture 603-8361, Japan
The site dates from 1397. It started off a a villa but was converted to the Kinkaku-ji complex
by the Shogun Ashikaga Yoshimitsu.
designated as a National Special Historic Site.
During the Onin war (1467–1477), all of the buildings in the complex aside from the pavilion were burned down. This golden pavillion remained in tact for nearly 500 years until 1950 when it was burned down by a 22-year-old novice monk,
Hayashi Yoken, who then attempted suicide on the Daimon-ji hill behind the building.
For more travel pics:
http://djjondent.blogspot.com.au/2015/03/travel-postcards-index-my-travel.html
Tuesday, 25 October 2016
NLC Doof Drum Module - Build notes
These are my build notes for the Nonlinearcircuits Doof drum module.
It's Eurorack format.
This is a very different circuit from the 808 & 909 clones doing the rounds today.
Can't believe I would ever tire of those sounds but its great to have something different.
This circuit uses a trimmed down NLC dual OTA VCO and the VCA from the NLC matrix mixer
(a future build).
I built the OTA VCO over a year ago.
http://djjondent.blogspot.com.au/2015/03/nonlinear-circuits-dual-ota-vco-build.html
That VCO used a OTA or Operational transconductance amplifier.
The topology is common enough in many drum synths: Trigger circuit, envelope follower, VCO, VCA.
Get started with some tanning. It's the Aussie way.
Firstly the virgin PCBs & faceplate:
First get those !Cs in.
Now the rest of the SMDs
I'm using a 10K on the RL ... LED resistor
Stuff in the through hole stuff:
pOTS & jacks next.
Now the LED. Get the orientation right. The anode is the long lead.
initial tests:
Initially, with a headphone, I found the volume very low and the LED didn't light up.
The LED resistor I used was a 10K. This is for super bright LEDs.
I swapped it for a 1K and noticed a sudden increase in volume & that the LED lit up.
I decided to do another swap. This time for a 510 R.
Much much better !!!
Very loud and the LED lights up nicely thanks.
:-)
-------------------------------
Andrew F suggested that in order to get a bigger output, I change the 220k next to the TL072
He has taken it to 4M7 ...which is way OTT, ....bounces off the power rails.
Maybe a more sensible range would be between 1M5 & 2M2.
For the moment I'm really happy with the standard Doof module.
Other mods include
1. CV control of decay instead of freq... see build & BOM pdf
http://www.sdiy.org/pinky/
2. replacing the 10nF capacitor on the input with a link to
Links:
1. NLC Build Notes
2. Muffs : adjusting output level of the Doof
3. NLC blog spot
It's Eurorack format.
This is a very different circuit from the 808 & 909 clones doing the rounds today.
Can't believe I would ever tire of those sounds but its great to have something different.
This circuit uses a trimmed down NLC dual OTA VCO and the VCA from the NLC matrix mixer
(a future build).
I built the OTA VCO over a year ago.
http://djjondent.blogspot.com.au/2015/03/nonlinear-circuits-dual-ota-vco-build.html
That VCO used a OTA or Operational transconductance amplifier.
The topology is common enough in many drum synths: Trigger circuit, envelope follower, VCO, VCA.
Get started with some tanning. It's the Aussie way.
Firstly the virgin PCBs & faceplate:
First get those !Cs in.
Now the LED. Get the orientation right. The anode is the long lead.
initial tests:
The LED resistor I used was a 10K. This is for super bright LEDs.
I swapped it for a 1K and noticed a sudden increase in volume & that the LED lit up.
I decided to do another swap. This time for a 510 R.
Much much better !!!
Very loud and the LED lights up nicely thanks.
:-)
-------------------------------
Andrew F suggested that in order to get a bigger output, I change the 220k next to the TL072
He has taken it to 4M7 ...which is way OTT, ....bounces off the power rails.
Maybe a more sensible range would be between 1M5 & 2M2.
For the moment I'm really happy with the standard Doof module.
Other mods include
1. CV control of decay instead of freq... see build & BOM pdf
http://www.sdiy.org/pinky/
2. replacing the 10nF capacitor on the input with a link to
create 808 style extended drum hits with gates rather than triggers.
Links:
1. NLC Build Notes
2. Muffs : adjusting output level of the Doof
3. NLC blog spot
-----------------------------------------------------------------------------------
You can find more NLC builds here.
---------------------------------------------------------------------------------------
Friday, 21 October 2016
Katzenklavier
How times have changed (thank goodness).
I came across this pic the other day. Is this for real ?
It's a drawing of a "cat organ".
Cruelty knew no bounds in the 17th century.
Many credit Athanasius Kircher with the original design of this instrument. He was a German Jesuit scholar.
"The musician selected cats whose natural voices were at different pitches and arranged them in cages side by side, so that when a key on the piano was depressed, a mechanism drove a spike in the appropriate cat’s tail. The result was a melody of meows".
Synth lovers today respect all animals, especially cats.
This is what Spike has to say about all this:
Thursday, 20 October 2016
All about JFETS - matching for synthesizers
This is a very good introductory video on JFETs - junction field effect transistors.
JFETs can be either N or P channel.
The channel conducts current moving from the source to the drain.
A voltage at the gate increases the channel resistance and reduces the drain source current.
Therefore, the FET can be used as an amplifier or a switch.
This is an excellent device.....Peak Atlas DCA Pro.
The bits about JFETS are around 7mins & the PC applications are at 14:20.
We often
want to use a JFET as a variable resistor, particularly in phasers.
The problem with JFETs is that it is much harder to make consistent JFETs than to make consistent bipolar devices. Therefore matching them is important.
These are screen shots taken of the readouts from my Atlas Pro of one of the JFETS.
Try to match the curves for each JFET along with as many other specs as possible.
I tested twelve J112s.
measuring VGSoff, Idss, VGSon in that order.
These were the results:
1. Vsg (off) = -2.97V
Idss = 0.51v
Vsg (on) = -2.04V
2. Vsg (off) = -3.14V
Idss = 0.50V
Vsg (on) = -2.04V
3. Vsg (off) = -2.98V
Idss = 0.51v
Vsg (on) = -2.05V
4. Vsg (off) = -2.71V
Idss = 0.54v
Vsg (on) = -1.80V
5. Vsg (off) = -2.99V
Idss = 0.51v
Vsg (on) = -2.06V
6. Vsg (off) = -2.68V
Idss = 0.55v
Vsg (on) = -1.77
7. Vsg (off) = -3.60
Idss = 0.46v
Vsg (on) = -2.63
8. Vsg (off) = -2.90
Idss = 0.53v
Vsg (on) = -1.98
9. Vsg (off) = -2.66
Idss = 0.55v
Vsg (on) = -1.76
10. Vsg (off) = -2.89
Idss = 0.53v
Vsg (on) = -1.97V
11. Vsg (off) = -3.17
Idss = 0.50v
Vsg (on) = -2.24
12. Vsg (off) = -3.15
Idss = 0.50v
Vsg (on) = -2.22V
A huge variation in results from just twelve J112s
I'll go with 1 & 3
1. Vsg (off) = -2.97V
Idss = 0.51v
Vsg (on) = -2.04V
3. Vsg (off) = -2.98V
Idss = 0.51v
Vsg (on) = -2.05V
Links:
1. Stompville
2. Learning about electronics
3. Geofex
4. Edn.com
JFETs can be either N or P channel.
The channel conducts current moving from the source to the drain.
Therefore, the FET can be used as an amplifier or a switch.
This is an excellent device.....Peak Atlas DCA Pro.
The bits about JFETS are around 7mins & the PC applications are at 14:20.
The problem with JFETs is that it is much harder to make consistent JFETs than to make consistent bipolar devices. Therefore matching them is important.
measuring VGSoff, Idss, VGSon in that order.
These were the results:
1. Vsg (off) = -2.97V
Idss = 0.51v
Vsg (on) = -2.04V
2. Vsg (off) = -3.14V
Idss = 0.50V
Vsg (on) = -2.04V
3. Vsg (off) = -2.98V
Idss = 0.51v
Vsg (on) = -2.05V
4. Vsg (off) = -2.71V
Idss = 0.54v
Vsg (on) = -1.80V
5. Vsg (off) = -2.99V
Idss = 0.51v
Vsg (on) = -2.06V
6. Vsg (off) = -2.68V
Idss = 0.55v
Vsg (on) = -1.77
7. Vsg (off) = -3.60
Idss = 0.46v
Vsg (on) = -2.63
8. Vsg (off) = -2.90
Idss = 0.53v
Vsg (on) = -1.98
9. Vsg (off) = -2.66
Idss = 0.55v
Vsg (on) = -1.76
10. Vsg (off) = -2.89
Idss = 0.53v
Vsg (on) = -1.97V
11. Vsg (off) = -3.17
Idss = 0.50v
Vsg (on) = -2.24
12. Vsg (off) = -3.15
Idss = 0.50v
Vsg (on) = -2.22V
A huge variation in results from just twelve J112s
I'll go with 1 & 3
1. Vsg (off) = -2.97V
Idss = 0.51v
Vsg (on) = -2.04V
3. Vsg (off) = -2.98V
Idss = 0.51v
Vsg (on) = -2.05V
Links:
1. Stompville
2. Learning about electronics
3. Geofex
4. Edn.com
Sunday, 16 October 2016
Kakadu National Park - Northern Territory Australia
Kakadu 2003
For more travel postcards click here:
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