search

ermtl / Open-Source-Ventilator

Complete control software for an emergency medical ventilator.
GNU General Public License v3.0
52 stars 30 forks source link

A few more resources #9

Closed Blimpyway closed 4 years ago

Blimpyway commented 4 years ago

Hi I'll add here links and docs I find useful, you decide whether you want them included in the project. A couple good tutorials about how to configure A4988 and DRV8825 stepper motor drivers: Most tricky one is current limit adjustment which is slightly different for the two drivers.

Attached is a drv8825.pdf, which can replace A4988. You already have A4988 pdf drv8825.pdf

Program /circuitry should not be affected they can replace each other in 3d printer boards.

ermtl commented 4 years ago

Thanks, there are several motor drivers that can be used with it. Drv8825 is interesting as it has higher voltage ability, however, latest calculations show we'll probably need a beefier motor and associated driver.

Something like this one: https://www.aliexpress.com/item/32714985325.html

Blimpyway commented 4 years ago

According to my testsl, a Nema17 with DRV8825 (and likely A4988 since it is tuned at under 1.2A) is fully capable to deliver pressure/volume/bpm needed.