Search found 2137 matches

by cackland
Mon Sep 21, 2020 6:08 am
Forum: General Gear
Topic: Strymon NightSky
Replies: 25
Views: 1324

Re: Strymon NightSky

Yeah don't get me wrong, its a great pedal and I'm sure you can get a lot out of it. I'm just like meh... strymon have done reverbs, have done delays, etc.. felt like this was kind of the same same and nothing new. No bad words to the team, well done. Just don't think its much of a difference to cal...
by cackland
Sun Sep 20, 2020 11:06 pm
Forum: General Gear
Topic: Strymon NightSky
Replies: 25
Views: 1324

Re: Strymon NightSky

Am I the only one who isn't excited for this?
by cackland
Sat Sep 19, 2020 5:48 pm
Forum: Music Tech DIY
Topic: Four-Layer PCB Stackup
Replies: 15
Views: 526

Re: Four-Layer PCB Stackup

devinw1 wrote:
Fri Jul 24, 2020 11:57 am
I have a sweet presentation on PCB layout that one of our EEs got from a seminar. I'll grab it next time I'm on my work PC and see if i can upload it. It's pretty detailed.
Did you even manage to get a hold of this?
by cackland
Fri Sep 18, 2020 7:38 am
Forum: Eurorack Modules
Topic: Supercritical NEUTRON FLUX 8 Pole Variable Character Filter
Replies: 9
Views: 520

Re: Supercritical NEUTRON FLUX 8 Pole Variable Character Filter

Interesting.... was looking for a new filter. Might have to consider this...
by cackland
Wed Sep 16, 2020 8:55 am
Forum: Eurorack Modules
Topic: What a used Natural Gate in VG condition looks like
Replies: 50
Views: 1656

Re: What a used Natural Gate in VG condition looks like

Maybe reach out to RE and see if they are willing to sell you a new faceplate, if they have any spare
by cackland
Tue Sep 15, 2020 1:01 am
Forum: Music Tech DIY
Topic: 4MS DLD diy
Replies: 4
Views: 256

Re: 4MS DLD diy

The first represents a jumper point for the MCU NRST pin. By default it is pulled high internally. If the switch is active, it pulls the pin low to reset the MCU. This point can be used as a reference point to ground the chip if it requires it and the switch fails presumably.
by cackland
Mon Sep 14, 2020 10:14 pm
Forum: Eurorack Modules
Topic: FX AID - multi audio effect module
Replies: 1251
Views: 97408

Re: FX AID - multi audio effect module

Use a spoon. Doesn't damage the module and gives good leverage
by cackland
Tue Sep 08, 2020 6:18 am
Forum: Eurorack Modules
Topic: Joranalogue TRANSMIT 2 - Stereo Balanced XLR Line Outputs
Replies: 43
Views: 3960

Re: Joranalogue TRANSMIT 2 - Stereo Balanced XLR Line Outputs

deft_bonz wrote:
Tue Sep 08, 2020 6:14 am
Awesome, nice simple straight forward. And NO freaking HP included. Too many interfaces incorporate a HP-amp. Most have a mixer anyway that features that, which is enough.
Huh? Transmit 2 does incorporate headphones.
by cackland
Sat Sep 05, 2020 9:11 pm
Forum: Music Tech DIY
Topic: toggle switch protection
Replies: 9
Views: 235

Re: toggle switch protection

Which modules are you referring to?
by cackland
Mon Aug 31, 2020 6:08 pm
Forum: Music Tech DIY
Topic: Custom MIDI controller with many inputs
Replies: 24
Views: 356

Re: Custom MIDI controller with many inputs

It's just an alternative. Sometimes I know that I'll ~think~ I know what I want ... but then someone exposes me to something I'd not considered and I suddenly find I've rethought my appraoch. You never know! :) Good point, this is true. If it were me, I'd go DIY. This way the OP understands what is...
by cackland
Mon Aug 31, 2020 3:57 am
Forum: Music Tech DIY
Topic: Custom MIDI controller with many inputs
Replies: 24
Views: 356

Re: Custom MIDI controller with many inputs

Will there be any noticeable performance issues (latency) with using multiplexers? Apologies, I'm a bit of a newb. Not if your implementation is efficient. Usage of interrupts is recommended here. If you want to go DIY, I would suggest getting a division of the number you intended to use, and test ...
by cackland
Sun Aug 30, 2020 5:19 pm
Forum: Music Tech DIY
Topic: Custom MIDI controller with many inputs
Replies: 24
Views: 356

Re: Custom MIDI controller with many inputs

Yes, this can definitely be done with a single MCU and several 16 channel multiplexers. 5 IC's gives you the ability to have 80 inputs. CD74HC4067 @ around $1 each. https://au.mouser.com/ProductDetail/Texas-Instruments/CD74HC4067M96?qs=xFfolx0DHx0XT7d9xTTZBA%3D%3D Note: there are even 32 channel mul...
by cackland
Fri Aug 28, 2020 11:11 pm
Forum: Music Tech DIY
Topic: Power Rails voltage drop
Replies: 31
Views: 514

Re: Power Rails voltage drop

Thanks guys. I'm definitely looking at ways to reduce the power consumption. Appreciate the feedback.
by cackland
Thu Aug 27, 2020 5:44 pm
Forum: Music Tech DIY
Topic: Power Rails voltage drop
Replies: 31
Views: 514

Re: Power Rails voltage drop

200mA draw on the positive rail does seem like a fair bit so I think it is worth a bit of exploration to see if that is a natural consequence of sensible design, a consequence of a slightly flawed design, or a result of a problem with the build itself. Thanks cygmu. It could be a result of all. 70m...
by cackland
Wed Aug 26, 2020 8:37 am
Forum: Music Tech DIY
Topic: Power Rails voltage drop
Replies: 31
Views: 514

Re: Power Rails voltage drop

The processor uses at most 70mA at 72MHz so that doesn't explain the 200mA you see. Even with 70mA current consumption you should consider using a switching voltage regulator for improved efficiency and less current from the +12V supply. Do you need to run it at max frequency or can the application...
by cackland
Wed Aug 26, 2020 8:34 am
Forum: Music Tech DIY
Topic: Power Rails voltage drop
Replies: 31
Views: 514

Re: Power Rails voltage drop

An alternative to diodes are MOSFETs, which will have a lower voltage drop if you really need to squeeze the last few 100mV or so out of the rails. Neil Yes, you must of missed this mentioned above: I've seen some circuits with these mosfet diodes in place of the 1N5819. https://au.mouser.com/Produ...
by cackland
Tue Aug 25, 2020 9:45 pm
Forum: Music Tech DIY
Topic: Power Rails voltage drop
Replies: 31
Views: 514

Re: Power Rails voltage drop

I was also thinking about implementing an inline current rail test point, using a 2.54 2 pin header.

Is it as straight forward as this? (With jumpers when not testing)
Screen Shot 2020-08-26 at 12.44.56 pm.png
by cackland
Tue Aug 25, 2020 9:40 pm
Forum: Music Tech DIY
Topic: Power Rails voltage drop
Replies: 31
Views: 514

Re: Power Rails voltage drop

You have all the information you need. Presumably the input voltage (the line going off the page to the left) is 12V. The 1N5819 is a Schottky diode, so it will reduce the voltage by about 0.3V - you measure 11.6V between the diode and the resistor, so that's about right. You say that the voltage o...
by cackland
Tue Aug 25, 2020 9:38 pm
Forum: Music Tech DIY
Topic: Power Rails voltage drop
Replies: 31
Views: 514

Re: Power Rails voltage drop

KSS wrote:
Tue Aug 25, 2020 6:19 pm
Along the lines of what neil brought up.
Is the PSU a half wave wall wart typev supply? Those don't handle uneven rail draw very well.
The power supply is a mean well GSM90A15-P1M.. The same as Intellijel provides with their 7U case.
by cackland
Tue Aug 25, 2020 9:37 pm
Forum: Music Tech DIY
Topic: Power Rails voltage drop
Replies: 31
Views: 514

Re: Power Rails voltage drop

How does the negative rail look? Are you seeing the same voltage drop across R43? Whatever your circuit is doing it is pulling around 200mA from the positive rail = 2.4W. Toasty. Are there any digital bits that are being driven off a local 5V regulator? Perhaps a 7805? Yes, there is a digital secti...
by cackland
Tue Aug 25, 2020 9:17 am
Forum: Music Tech DIY
Topic: Power Rails voltage drop
Replies: 31
Views: 514

Re: Power Rails voltage drop

Is your main power supply still providing 12V? It doesn't matter where you measure it, the voltage on the module power rail should be constant (within a few millivolts) Interesting.. I'm measuring 11.6V in between the 1N5819 diode and the 10 ohm resistor. So much more than a few millivolts from the...
by cackland
Tue Aug 25, 2020 9:15 am
Forum: Music Tech DIY
Topic: Power Rails voltage drop
Replies: 31
Views: 514

Re: Power Rails voltage drop

If your modules are drawing 200mA then the 10R will drop 2V. That seems plausible to me. What are you powering from this? It’s a multi channel VCA processor module. Haven’t tested the current module draw at the moment... Back to the idea of headroom. If the module is drawing a certain amount of cur...
by cackland
Tue Aug 25, 2020 6:38 am
Forum: Music Tech DIY
Topic: Power Rails voltage drop
Replies: 31
Views: 514

Re: Power Rails voltage drop

KSS wrote:
Tue Aug 25, 2020 3:30 am
check the batteries in your meter.
Good call... however multimeter has new batteries. Other voltages measured in the circuit are correct.
by cackland
Tue Aug 25, 2020 6:38 am
Forum: Music Tech DIY
Topic: Power Rails voltage drop
Replies: 31
Views: 514

Re: Power Rails voltage drop

Is your main power supply still providing 12V? It doesn't matter where you measure it, the voltage on the module power rail should be constant (within a few millivolts) Interesting.. I'm measuring 11.6V in between the 1N5819 diode and the 10 ohm resistor. So much more than a few millivolts from the...

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