What are the supply+output voltages of the Stomp Shield?

What are the supply+output voltages of the Stomp Shield?

Postby diydsp » Fri Jan 24, 2014 7:10 pm

Hi! I haven't put my Stomp Shield together yet to test, but from a quick glance at the Stomp Shield Schematic (http://wiki.openmusiclabs.com/wiki/StompShield?action=AttachFile&do=get&target=stomp_schematic.png) it appears the output may swing from 0V to 5V. Is that correct? And is the output centered around 2.5V?

I'm asking because I want to recommend one to a friend for use with the STM32F4, same thing I would like to do. The maximum input voltage for the stm32f4 ADC is 3.6V, but it's supply voltage to the ADC is typically at 3.0v on some m4 dev boards and 3.3v on other dev boards.

(from the spec sheet http://ww1.microchip.com/downloads/en/DeviceDoc/21733h.pdf, the MCP6004 seems to run rail-to-rail and down to 1.8V, so I'm wondering if it's possible to supply the StompShield with 3.0v or 3.3v signals)

Thank you very much! Here's the thread where we're talking about the StompShield: http://www.reddit.com/r/stm32f4/comments/1vutow/can_i_use_the_stm32s_dsp_instructions_to_sample/
Last edited by diydsp on Sat Feb 01, 2014 12:40 pm, edited 1 time in total.
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Re: What are the supply+output voltages of the Stomp Shield?

Postby guest » Sat Jan 25, 2014 2:42 pm

yes, you can run the stomp shield at any voltage down to 1.8V.
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Re: What are the supply+output voltages of the Stomp Shield?

Postby diydsp » Sat Feb 01, 2014 12:45 pm

Awesome, thanks for the response!

BTW, I had the link to the STM32F4 forum wrong in my last post. That's where I was encouraging a guy who wanted to build a guitar tuner from the STM32F4 Discovery Board to try using a StompShield as a preamp + Nyquist filter. Here is the proper link: ttp://www.reddit.com/r/stm32f4/comments/1vutow/can_i_use_the_stm32s_dsp_instructions_to_sample/

I wonder if he got it to work... (suspense)
http://diydsp.com is where I teach people Do-It-Yourself Digital Signal Processing for music instruments and other applications.
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