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by energyi
Mon Jun 17, 2019 7:03 am
Forum: Automation, sensing and robotics
Topic: Indoor Environmental Sensor
Replies: 4
Views: 376

Re: Indoor Environmental Sensor

Thumbs up, great work on the sprinkler.
by energyi
Thu Jun 13, 2019 5:37 pm
Forum: Automation, sensing and robotics
Topic: Indoor Environmental Sensor
Replies: 4
Views: 376

Re: Indoor Environmental Sensor

Very nice work for your sleep study. Are you planning to open source the code and packaging? Could be valuable for other applications. I like the idea of monitoring car indoor conditions, and possibly have a pm 2.5 sensor added. Using BME280's for humidity control on a swamp cooler. Also BME680s are...
by energyi
Thu Jun 06, 2019 4:44 pm
Forum: General discussion
Topic: Automatic shutdown for pi in a car
Replies: 22
Views: 13897

Re: Automatic shutdown for pi in a car

Assuming you want to shut down properly to save the microSD card. I did a rpi ZeroW car unit for about a year on a cheap microSD card which just shutdown when ever the car was turned off, no problems. YMMV

Another option is a USB boot, which might be less detrimental to a power off scenario.
by energyi
Thu Jun 06, 2019 12:23 am
Forum: General discussion
Topic: 2cameras and 1raspberry ?
Replies: 3
Views: 164

Re: 2cameras and 1raspberry ?

One Rpi Zero can have one usb camera and one Raspberry pi camera connected to the special camera socket running headless. A pi 2 or 3 has four USB ports, so can have five cameras, again headless. Previous thread on using low cost salvaged webcams for usb video input on a zero: https://www.raspberryp...
by energyi
Tue May 28, 2019 2:17 pm
Forum: General discussion
Topic: 120 GB SATA and Zero
Replies: 11
Views: 701

Re: 120 GB SATA and Zero

Below is a photo of the motherboard 20 pin connection for the tiny HP SATA, of which 8 wires are used. The numbers on the HP motherboard are CN8 PC1043 PC1042 and R8157. I doubt there is any circuitry in that HP mini SATA cabling, which to clarify is USB 2.0, not 3.0; but possibly better from a pric...
by energyi
Mon May 27, 2019 4:13 pm
Forum: General discussion
Topic: 120 GB SATA and Zero
Replies: 11
Views: 701

Re: 120 GB SATA and Zero

Just found this salvaged SATA connector from an old HP mini. Has 8 manageable wires.
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by energyi
Mon May 27, 2019 3:49 pm
Forum: General discussion
Topic: 120 GB SATA and Zero
Replies: 11
Views: 701

Re: 120 GB SATA and Zero

Thanks for the replies and HawaiianPi thanks for the photos. Sounds like a good 3d printing project for packaging a Zero above or below the disassembled drive. Cable and USB to SATA cable will still be clugy. Thanks.
by energyi
Sun May 26, 2019 2:06 pm
Forum: General discussion
Topic: 120 GB SATA and Zero
Replies: 11
Views: 701

120 GB SATA and Zero

Picked up a Inland 2.5" 120GB SSD SATA III 6GB/s priced very inexpensively at micro-center, which is where you can also purchase $5 rpi zero's one at a time in person. The SATA drive is faster than the USB 2, but good to have that speed for other purposes. I pulled the 2.5" package apart and noticed...
by energyi
Sat May 25, 2019 2:18 am
Forum: General discussion
Topic: Combine Rpi with other low cost device for massive computing power
Replies: 5
Views: 366

Re: Combine Rpi with other low cost device for massive computing power

New $25 hat for Rpi from Seeedstudio that relates to this thread:

https://www.seeedstudio.com/Grove-AI-HA ... -4026.html

I can't find and performance information for comparison to what has already been discussed.

Best,

energyi
by energyi
Wed May 22, 2019 12:15 am
Forum: General discussion
Topic: Combine Rpi with other low cost device for massive computing power
Replies: 5
Views: 366

Re: Combine Rpi with other low cost device for massive computing power

Thanks ejolson. Interesting perspective on training a model and running a model. Just trying to figure out this whole ecosystem for AI Machine Learning. I like the idea of using a Jetson Nano to train, then use a Rpi Coral TPU to run the inference model. Headless Zero W with a rpi camera and Coral T...
by energyi
Tue May 21, 2019 2:17 am
Forum: General discussion
Topic: Combine Rpi with other low cost device for massive computing power
Replies: 5
Views: 366

Re: Combine Rpi with other low cost device for massive computing power

Hadn't thought of other sbc's. Still with only USB2 Rpi is respectable.
by energyi
Tue May 21, 2019 12:41 am
Forum: General discussion
Topic: Combine Rpi with other low cost device for massive computing power
Replies: 5
Views: 366

Combine Rpi with other low cost device for massive computing power

This article compares different AI scenario performance including using a raspberry pi: https://blog.usejournal.com/google-coral-edge-tpu-vs-nvidia-jetson-nano-a-quick-deep-dive-into-edgeai-performance-bc7860b8d87a Adding the coral usb accelerator to a Rpi seems to be a very low cost, high powered a...
by energyi
Fri May 17, 2019 12:56 am
Forum: General discussion
Topic: Pi Zero W on sale at Microcenter
Replies: 4
Views: 333

Re: Pi Zero W on sale at Microcenter

Get at least one every time I'm near; on March 4th they cost $3.14. Wifi, bluetooth, HDMI, complete processing computer, usb, camera and video headers, gpio.....
by energyi
Tue May 14, 2019 3:43 pm
Forum: General discussion
Topic: Considering the Barium Supply Chain Hackers and Raspberry Pi
Replies: 14
Views: 603

Re: Considering the Barium Supply Chain Hackers and Raspberry Pi

Will5455 wrote a thoughtful post which I have bullet-ed takeaways, thanks: * don't do anything that requires hiding * binary blobs into the VC4 GPU during boot are suspect * one protection strategy is reproducible binary builds that are independently verified by multiple parties which are independen...
by energyi
Mon May 06, 2019 2:30 pm
Forum: General discussion
Topic: RPi to 4 channel audio amplifier
Replies: 7
Views: 9271

Re: RPi to 4 channel audio amplifier

Suptronics
by energyi
Sun May 05, 2019 2:35 pm
Forum: General discussion
Topic: Considering the Barium Supply Chain Hackers and Raspberry Pi
Replies: 14
Views: 603

Re: Considering the Barium Supply Chain Hackers and Raspberry Pi

Thanks for the reply on both the systems made from Raspbery Pi's and the systems at Raspberry Pi. Is there any particular software/firmware in the current builds using NOOBS or Raspian that could be suspect to supply chain hacking? Was mostly interested in whether Raspberry Pis are inherently safe a...
by energyi
Fri May 03, 2019 1:10 pm
Forum: General discussion
Topic: Considering the Barium Supply Chain Hackers and Raspberry Pi
Replies: 14
Views: 603

Considering the Barium Supply Chain Hackers and Raspberry Pi

Are raspberry systems inherently safer or less safe to this kind of supply chain hacking?

https://www.wired.com/story/barium-supp ... ackers/amp
by energyi
Sat Apr 20, 2019 3:46 pm
Forum: General discussion
Topic: Solution for bad HDMI
Replies: 5
Views: 396

Re: Solution for bad HDMI

Another options was to get an 3.5" LCD touch screen, which I did and it worked. Came with a case, which is good except for one thing. I broke two, yes two miniSD cards when putting the raspberry pi and the case together, not noticing that there is no clearance for a raspberry pi with the miniSD card...
by energyi
Sun Mar 17, 2019 2:02 am
Forum: General discussion
Topic: Zero clusters? Pi day deals
Replies: 15
Views: 1147

Re: Zero clusters? Pi day deals

Is a video wall of multiple HDMI frameless monitors an application for a cluster of pi zeros?
by energyi
Sat Mar 16, 2019 1:41 pm
Forum: Teaching and learning resources
Topic: Super-cheap Computing Cluster for Learning
Replies: 41
Views: 30736

Re: Super-cheap Computing Cluster for Learning

Great thread ejolson et al. Thanks.
by energyi
Sat Mar 16, 2019 1:02 am
Forum: General discussion
Topic: Zero clusters? Pi day deals
Replies: 15
Views: 1147

Re: Zero clusters? Pi day deals

Example of a super-cheap pi-zero cluster : https://www.raspberrypi.org/forums/viewtopic.php?f=49&t=199994 (and links therein) That is one of the most amazing threads I have read on this board, +1 year long and full of great instructions and knowledge by ejolson and others. " the code developed for ...
by energyi
Sat Mar 16, 2019 12:25 am
Forum: General discussion
Topic: Zero clusters? Pi day deals
Replies: 15
Views: 1147

Re: Zero clusters? Pi day deals

Thanks mic_s, good answer.

energyi
by energyi
Fri Mar 15, 2019 8:50 pm
Forum: General discussion
Topic: Zero clusters? Pi day deals
Replies: 15
Views: 1147

Re: Zero clusters? Pi day deals

Thanks thagrol. me gusto mucho.

Usecase for individual low power SBC's clustered such?
by energyi
Fri Mar 15, 2019 6:23 pm
Forum: General discussion
Topic: Zero clusters? Pi day deals
Replies: 15
Views: 1147

Zero clusters? Pi day deals

Anyone done a Pi Zero cluster? Not for power, but to learn/test clusters. Any other good usecase for this?

Yes, addicted to pi. Microcenter deal till the 16 th, less than $11. Zero w, case and 16gig card.

Energyi
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FJIMG_20190315_121602-768x432.jpg (72.79 KiB) Viewed 1147 times

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