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Closer look

These (the TFT displays) are available in high quantities from multiple sources. We checked this very carefully before we started our ubitx (which uses this display as well). The controller it uses is

yup, but these people are willing to print $1T....so they don't care. That won't help people in 3rd world countries, so this little buggy we are working on may help many people. Thanks to all, gordon

Yeah, but I'll bet it costs more: Jack, W8TEE

The 0.1 ventilator lives! This one is just for testing and demonstrations ("integration") tomorrow for the UF team.? ?It took me several hours to do some very simple software for it since I am not a

Fantastic!? He's a lot smarter than me, and has a lot more resources also!! Great!

I would think SMD. While there's a little more startup costs for the PCB, the SMD parts are dirt cheap, light weight (low transport costs), and I think can be assembled more quickly. My vote is for

A question... I'd intended using through hole for all parts on the preliminary schematic attached as part of this thread - including resistors, caps and such. This with the wish that hand assembly be

https://www.thingiverse.com/thing:4239988 There is now a photo of this 3d printed bagger at the above link. Photo shows mounted stepper motor and controller. Designer states that 15-16 RPM is

Hi folks, Here's an archive of an early rev KiCad 5.1.5 project... So far, just a few components created along with footprints. I plan to continue work on this, but want the framework available in

I think Farhan is using a 2.8" 320x280 TFT screen using the SPI interface. If so, those are available for about $9. (See eBay #264476244273). The bad news is that it is from China. Perhaps Farhan has

https://www.mercurynews.com/2020/03/26/james-dyson-designed-a-new-ventilator-in-10-days-hes-making-15000-for-the-coronavirus-pandemic-fight/?utm_email=D4F2042FD402E448D4BFE42DBE

This looks great Farhan! Anything I can help with?? Jack, W8TEE

Yes these are also very good. Due to working on defence designs by default I go for metal connectors! If ashar has already used the 9pin rs232. A good coating of RTV. Silicone will do for proto!

Personally, I have used Lemo, Fischer etc. but for this app, I like the Hirose HR30 or similar, cheaper and good quality. See the attached data sheet. -- Howard W2HFF

I took a quick at Digikey. The BMP280 part that was being considered is plentiful and inexpensive. At least at Digikey, vented gauge types were not in stock in large quantities. With all the folks

Ashar and all Had suggested to use rtv On the connector pin to body area It will stop leaks Rtv is better than the Hot melt glue in this case Also suggested Lemo connectors Others also suggested a

Ashhar: My wife is an ER nurse who also has years in ICU/CCU. I showed her your demo video. She thought that the UI would work. She said that the button terminology should be reviewed. i.e. anything

It looks like the BMP28 is a gauge pressure sensor. They caution that the back is delicate and must be kept unobstructed so it must act as the other port. The Bosh spec cautions? protecting the

I watched the video and the UI looks great, congrats. However, I am not sure if that touchscreen display would be widely available nor how costly it would be. The LCD 20x4 I am using is $12 and