If you are going to do a new revision of the board, maybe you could consider the INA226. It has a bus voltage LSB of 1.25 mV, while the INA219 as a 4 mV LSB. Also, I think it is possible to set the 226 alert pin so it triggers an interrupt on under/over voltage/current.
@pcbreflux
6 жыл бұрын
Álvaro M. Valdebenito B. Thank you, the price for the INA226 is a little higher but also the min supply voltage of 2.7V makes this a interesting alternative. Will read the datasheet and have a look about the software. Have a nice day.
@iwbnwif
6 жыл бұрын
Thanks for another great video and project (please more on using KiCad, your thought processes in circuit layout especially). Are you monitoring the battery state-of-charge just by voltage or do you plan to do 'coulomb-counting' with the current flow? My first KiCad design was a coulomb counter earlier this year, but for LiFePo4 technology - great fun!
@pcbreflux
6 жыл бұрын
Thanks, most time of my thought process in circuit design is reading the datasheets and do a parametricial search on big electronic sellers sites and also calculating the total BOM cost. After placing the footprints its just a little bit of try and error. Some errors I found after ordering a board, but luckily some orders can be canceled and replaced. Not planing a coulomb counter but just adding time to the current measurements should be easy.
@ats89117
6 жыл бұрын
Thanks for the great video. I am building a power amplifier board for driving piezoelectric transducers which also uses the INA219 and the Si7060 ICs to monitor status, so I am very interested in monitoring your experience. Since my eyesight isn't good, I have my boards stuffed by machine and to make this cost effective, a volume of 20+ boards is generally ordered. My greatest fears when I am doing a PCB design is getting the footprint wrong or missing a note in the datasheet which indicates that a control pin's voltage must be constrained. When an error occurs, not only does the board have to be redesigned, which isn't usually that big a deal, but the parts are wasted, which can be expensive, and it takes a fair amount of time for building the PCBs, stuffing them, and shipping (I am also always using the cheapest delivery method!). Maybe someday somebody will develop a piece of CAE software which checks the BoM against the PCB design and flags cases where the footprint doesn't fit the part that was ordered... Anyway, once again, thanks for your wonderful videos!
@pcbreflux
6 жыл бұрын
ats89117 Thanks, one advice I am unfortunately also not follow is: just print the pcb layout on paper before ordering. Think this had saved me a lot of time and troubled, but sometimes I try to rush things and then they even slower. You can find all the SI7060 code in the description and I use not the adafruit library for the INA219 on the ESP32 (not working for me with u8g2 I2C displays). Have a nice day
@ats89117
6 жыл бұрын
Thanks! I've heard this suggestion many times but for some reason I've never taken it. It would only cost a few days to order the parts first, so of course this is the right way to go...
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