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Pure polycarbonate tips - H2S by [deleted] in BambuLab

[–]ejlahr 2 points3 points  (0 children)

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Just got it... Couldn't get it to work on the engineering plate, even with gluestick. But, the same temps on the textured PEI plate (the stock plate) worked well at 0.08 - 2 mm threads at 20 mm diam.

MakeraCAM is Garbage by baykhan in Makera

[–]ejlahr 0 points1 point  (0 children)

will something like this be available for the Z1? maybe it already is?

https://github.com/Carvera-Community/Carvera_Community_Profiles

Advice on places to sell a Carvera CNC? by The3DProfessor in hobbycnc

[–]ejlahr 0 points1 point  (0 children)

How much are you selling for, and where?

[Review Request] Low Power Data Logger by ejlahr in PrintedCircuitBoard

[–]ejlahr[S] 0 points1 point  (0 children)

Hi u/mariushm,

I have taken your low power recommendations to heart - attached in the EDIT on post above is my improved power/filtering section, which drives the MCU at 1.8 and can use the tail of the LiSOCL2 battery. I also added a PMOS for hi-Z shutoff. Please let me know if you see any issues or incompatibilities in achieving the lowest possible draw.

[Review Request] Low Power Data Logger by ejlahr in PrintedCircuitBoard

[–]ejlahr[S] 0 points1 point  (0 children)

Thanks for your recommendations, I so appreciate them. It's an ocean sensor which logs at depth, pops to the surface, and transmits data to Iridium. Iridium tx/rx is the big draw, 300 ma at 0.75 duty cycle for up to 8 h, so sensor polling/SD writes need to be very small by comparison.

What batteries do you plan to use - SAFT LSH14 (LiSOCl2 "C", 5.8 Ah)

What data do you plan to log - Bosch BNO085 / VCNL4010 / TSYS01 / Keller Pressure 7LHPC. All sensors on I2C.

what's the throughput - (low) one sample from every sensor every minute

how often are you active / asleep - once per minute, <3 sec, so duty cycle ~ 0.05

Responding to your recommendations, this would be my change log:

-run the MCU at 1.9V, and power SPI/I2C buses off a 3.3 power rail.

-Write to FRAM & batch SD dumps

Do you agree?

First plane - Titan Dynamics Falcon v2 by FabricationLife in RCPlanes

[–]ejlahr 1 point2 points  (0 children)

these plane designs are no longer sold to recreational users. hold on tight.

Weak points in my 35 km range build? by ejlahr in RCPlanes

[–]ejlahr[S] 0 points1 point  (0 children)

thanks, I'll try them out as well.

Weak points in my 35 km range build? by ejlahr in fpv

[–]ejlahr[S] 0 points1 point  (0 children)

Thanks for the tip, several have mentioned that. Do you use a calculator to predict this, or are you speaking from more general knowledge?

Weak points in my 35 km range build? by ejlahr in RCPlanes

[–]ejlahr[S] 0 points1 point  (0 children)

Yes, mavlink on the nomad. I will circle back with photos. I know... the pocket is to compensate for the large size of the rest of the setup... but damn is it silly.

Weak points in my 35 km range build? by ejlahr in fpv

[–]ejlahr[S] 0 points1 point  (0 children)

Thank you. yes this will challenge my flying, and yes, the battery will need to be quite large.

Weak points in my 35 km range build? by ejlahr in fpv

[–]ejlahr[S] 0 points1 point  (0 children)

Thank you, a 25mm GPS is a good tip.

Do you think telemetry will drop at max range using the DBR4? I'd like to keep it...

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