Ontopic Random Computer-Electronics Thread

Jehannum

HO HO HO METH GIANT
Jul 24, 2013
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AAA battery size.

The computer ran in cycles of 45 minutes of calculating sums of consecutive integers to simulate a computational workload, which required 0.3 microwatts of power, and 15 minutes of standby, which required 0.24 microwatts.

Ignoring the differential between standby and load:

Thats 0.0003 mW load x (24 hours x 6 months). Thats 4320 hours at .0003mW (.0000003W)

Cortex M0+ operates at 1.8 V to 3.6 V. Lets assume they were operating at minimum voltage.

Thats a .00000017 amp load at 1.8v.

Overall capacity over the full 4320 hours of the battery is 0.0013 Wh. At 1.8v that is 0.72222222222 mAH

A aaa battery at 1.8v (overprovisioned) has 850-1,200 mAh capacity.


TLDR: This entire paper is useless bullshit.

At their same load, the Cortex M0+ would run for 1000X longer on a AAA battery.
There are a ton of existing technologies that would work as well, I'm more interested in whether I could use pre-existing sources of algae, like my neighbors' pool.

or maybe this piss moat:
 

fly

Osharts 11
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AAA battery size.

The computer ran in cycles of 45 minutes of calculating sums of consecutive integers to simulate a computational workload, which required 0.3 microwatts of power, and 15 minutes of standby, which required 0.24 microwatts.

Ignoring the differential between standby and load:

Thats 0.0003 mW load x (24 hours x 6 months). Thats 4320 hours at .0003mW (.0000003W)

Cortex M0+ operates at 1.8 V to 3.6 V. Lets assume they were operating at minimum voltage.

Thats a .00000017 amp load at 1.8v.

Overall capacity over the full 4320 hours of the battery is 0.0013 Wh. At 1.8v that is 0.72222222222 mAH

A aaa battery at 1.8v (overprovisioned) has 850-1,200 mAh capacity.


TLDR: This entire paper is useless bullshit.

At their same load, the Cortex M0+ would run for 1000X longer on a AAA battery.
I mean, did you really expect it to perform like a AAA? :wtf:
 

fly

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@Domon After a false start, I got that mikrotik router installed. That thing is intense for my feeble little brain. I wanted to change the network from using 192.168.88.0 to using 192.168.1.0 (cause I have no idea what might be hardcoded, and I don't care to find out rn). Turns out, you have to make changes in like six different areas to make that happen.

:lol:

For now my Orbi wifi shit is just running in AP mode. Next I will setup the Omada AP and sunset all this Orbi stuff.
 
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Domon

Robotic Dexter
May 19, 2011
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@Domon After a false start, I got that mikrotik router installed. That thing is intense for my feeble little brain. I wanted to change the network from using 192.168.88.0 to using 192.168.1.0 (cause I have no idea what might be hardcoded, and I don't care to find out rn). Turns out, you have to make changes in like six different areas to make that happen.

:lol:

For now my Orbi wifi shit is just running in AP mode. Next I will setup the Omada AP and sunset all this Orbi stuff.
you're building new skills :)

and yeah, changing your base range requires 5 steps... but the initial quickset can do it for you in a wizard.
 
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fly

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you're building new skills :)

and yeah, changing your base range requires 5 steps... but the initial quickset can do it for you in a wizard.
Yeah, I initially did it in QuickSet, but it did not work. Clearly I must have done something wrong in the wizard (lol). But the drawn out process worked.
 

Josh

Biff Clurton
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Make sure that the mikrotik router does not have admin/webbox access enabled on the WAN interface. So many exploits with mikrotik devices.
 
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fly

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Went ahead and picked up one of these. Since I really don't buy wireless gear very often, I figured I'd pay the extra $20 for Wifi 6.

Amazon product

Weird. So the download performance to my phone is about half of my Orbi shit. 160Mbps vs 80Mbps. Tested multiple times with phone stationary.
 

fly

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check channel interference
It looks like it was actually cause I was testing it with the AP on the floor. :lol:

However, I've now run into the old problem I have in that @APRIL's PC won't do wireless. Fuck. Not sure how I forgot about that. Just for fun, I think I'm going to try a PCI NIC.
 

ZRH

(retired?) Google-F.U.
Mar 5, 2005
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It looks like it was actually cause I was testing it with the AP on the floor. :lol:

However, I've now run into the old problem I have in that @APRIL's PC won't do wireless. Fuck. Not sure how I forgot about that. Just for fun, I think I'm going to try a PCI NIC.
PUT A LIVE LINUX CD IN IT AND SEE IF IT'S A WINDERS PROBLEMO
 

fly

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So I created an SSID with another VLAN tag on my Omada AP. I want this SSID to not have any internet access, but still be able to talk to my Home Assistant. How do I do that on the Mikrotik side? Everything I've seen seems to mention setting certain ports to a VLAN, but its a single port going to the AP. I assumed this was possible with VLAN tagging, but I'm a *terrible* network admin.

Is this possible? If so, how?
 

fly

Osharts 11
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Another question. I have VLAN tagging setup on my AP. And the Mikrotik router setup to hand out a different set of IPs for that VLAN. The only thing I can't figure out is how to prevent that VLAN from talking to anything else on the network.

@Josh @Domon
 

Josh

Biff Clurton
Oct 9, 2006
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Another question. I have VLAN tagging setup on my AP. And the Mikrotik router setup to hand out a different set of IPs for that VLAN. The only thing I can't figure out is how to prevent that VLAN from talking to anything else on the network.

@Josh @Domon
Firewall rules within the Mikrotik will do that.
So I created an SSID with another VLAN tag on my Omada AP. I want this SSID to not have any internet access, but still be able to talk to my Home Assistant. How do I do that on the Mikrotik side? Everything I've seen seems to mention setting certain ports to a VLAN, but its a single port going to the AP. I assumed this was possible with VLAN tagging, but I'm a *terrible* network admin.

Is this possible? If so, how?
Firewall deny rule on that vlan will do this.
 

fly

Osharts 11
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I setup a rule that says from IoT VLAN to NOT Ether1(Internet) DROP. But it's not working. I can still ping things from the IoT VLAN.
 

Hoff Kinkmeister

never met a virtue I wont signal
Apr 16, 2016
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Is there any phone-esque (small, battery) device that's a high-quality audio player and DAC first, with wifi browsing?

Edit: Eh nvm.
 
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