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Post by 101 on Jul 30, 2019 12:14:50 GMT
I'm interested in constructing a clock counter and clock divider to work with my AEM. I don't know that much about Arduinos and it's a bit bewildering what's the best one to work with 5v. Any Arduino experts here that can advise which current version is a good choice? I'm alright with circuit building and programming generally.
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Post by NightMachines on Jul 30, 2019 12:18:56 GMT
I’ve used a bunch of Arduino Pro Micros, which are available as 5V versions (make sure you buy the right ones!). They are tiny and fit well behind a 1U module. edit: bought a few of those ones and so far they all worked www.aliexpress.com/item/32768308647.htmlhere’s their pinout:  |
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Post by 101 on Jul 30, 2019 14:09:35 GMT
Thank nightmachines. I'd looked at the Arduino pro but it looks discontinued. I'm trying to get my head around using interrupts to work with board input events. Like setting an action after a certain clock count e.g set a pin high which I can feed into the 3CVSWITCH. I guess I have to match AEM current as well as voltage. Thought I'd also try to tack on a simple clock divider. Happy just to patch into the AEM as an outside module as I thought of using a 7 segment clock display on it.
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Post by NightMachines on Jul 30, 2019 14:35:26 GMT
The Pro Micro already receives and outputs up to 5V and while I’m not sure about current, my experiments and modules all worked great without any complicated matching stuff. You would buffer the outputs and use 100k pull down resistors on the inputs and then the arduino should behave. Especially when you only use it with gates, there isn’t really much that one has to do to make it work.
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Post by thetechnobear on Aug 1, 2019 16:09:40 GMT
For my Arduino module I used a Arduino nano , which is good for 5v
One (obvious) tip, plan out the module carefully in advance, it’s easy to be over optimistic in module size, which can make the soldering task tricky.
I tend to try to go a little bit bigger and make sure I have room for pots etc.
Oh also see my Arduino project for an example of how to add extra analog outputs, it is actually very simple, and is really valuable imo.
Note: going down to 3.3v is not that tricky either really, simple voltage divider usually ok - use a trim pot if you want to be able to calibrate.
The to go up to 5v use an opamp , or if you use a codec then that will do it for you.
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Post by 101 on Aug 18, 2019 16:26:41 GMT
I went for this. Hoping it's the right voltage specs though  any advice much appreciated on that.
It's only got to do outs. I've decided to try to make two variable speed LFOs with PWM and a clock divider. Fingers crossed though on the specs.
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Post by NightMachines on Aug 18, 2019 17:23:13 GMT
I went for this. Hoping it's the right voltage specs though any advice much appreciated on that.
It's only got to do outs. I've decided to try to make two variable speed LFOs with PWM and a clock divider. Fingers crossed though on the specs.
This should be good for developing a module, because you can patch it directly to your AE Modular without the need to solder pin headers to the Arduino first. It’s big though and won’t fit in the rack under a front panel. But that’s not a problem really. You can simply load your code onto and Arduino Nano, as thetechnobear mentioned, later on when you want to have it in your AEM rack. |
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bahm
Full Member
Posts: 154
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Post by bahm on Aug 18, 2019 17:58:11 GMT
And now while you are testing with your board you have all the time to wait for a shipment from China. You can get about 10 Nanos with shipping for 20€. Aliexpress |
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Post by 101 on Aug 18, 2019 18:53:17 GMT
Thanks for the advice. I'm breathing sighs of relief from the experts here.
I'm hoping I can just patch into the AE as an external module from the headers. I'm going to need to make some variable pots too for setting speed and PWM duty cycles. And some LEDs and a DAC ? I'm hazy on PWM buft I'm guessing you have to model how an analogue circuit does it in the software. It would be good to make an imitation bitranger in the long term if I can get my head around it all. I have zero experience of Arduinos so its going to be fun  Edit
Methinks can use onboard ADC from the article.
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any advice much appreciated on that.
