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by justinm001
Tue Apr 25, 2017 6:02 pm
Forum: General discussion
Topic: Alernative ways to power a Pi
Replies: 32
Views: 5834

Re: Alernative ways to power a Pi

Running power is last resort and would cost about $1000 per location with about 50 locations. These closets are designed to not have power for compliance reasons and would be a huge pain if needed. We service about once per year and looking for a permanent solution. These are network closets with ca...
by justinm001
Sun Apr 23, 2017 9:33 pm
Forum: General discussion
Topic: Alernative ways to power a Pi
Replies: 32
Views: 5834

Re: Alernative ways to power a Pi

work with florescent? If we get large enough solar cells and a battery, then leave the lights on 24x7 in the room, it should work fine, right? That would probably--over time--cost more that having an outlet added to the closet. You'd be converting electricity to light, and then back to electricity....
by justinm001
Sun Apr 23, 2017 9:27 pm
Forum: General discussion
Topic: Alernative ways to power a Pi
Replies: 32
Views: 5834

Re: Alernative ways to power a Pi

We're in the US. The issue is we need to monitor events in those types of closets but don't want any permanent changes done if at all possible.
by justinm001
Sun Apr 23, 2017 11:57 am
Forum: General discussion
Topic: Alernative ways to power a Pi
Replies: 32
Views: 5834

Re: Alernative ways to power a Pi

The main issue is most network closets do not have any power outlets at all in the room. They're utility closets and usually contain breakers or some form of electrical conduit. This would be great if we could induction tap into the lines, or something without requiring an electrician running a line...
by justinm001
Sat Apr 22, 2017 9:29 pm
Forum: General discussion
Topic: Alernative ways to power a Pi
Replies: 32
Views: 5834

Re: Alernative ways to power a Pi

PI consumption isn't 5V 2A thats max power. Pi 3 B with wifi is only 250mA (1.2W) zero is only 80mA (.4W) This should be plenty to pull from a phone line with a step down conversion to 5v, right? I understand it'll kill the line but if that line isn't used for anything anyways it shouldn't affect an...
by justinm001
Sat Apr 22, 2017 8:38 pm
Forum: General discussion
Topic: Alernative ways to power a Pi
Replies: 32
Views: 5834

Re: Alernative ways to power a Pi

We have a lot of equipment in networking closets and many are without power in room. We're looking for a way to power a Pi without having electrician wire us an outlet. a couple have a standard screw in light bulb so we could use one of those adapters to get outlets but others either have florescent...
by justinm001
Sat Apr 22, 2017 4:06 pm
Forum: General discussion
Topic: Alernative ways to power a Pi
Replies: 32
Views: 5834

Alernative ways to power a Pi

How can I power a Pi 24x7 without using an outlet? Would any of the ways below work or are there other ways i'm not thinking of?

Plugged into a POTS phone line (I believe 48VDC 100ma)
Somehow pull power from next to a breaker box (without splicing wires)
Use solar power and battery box
by justinm001
Mon Jun 22, 2015 1:41 am
Forum: General discussion
Topic: control variable SSR output 4-32VDC
Replies: 14
Views: 3459

Re: control variable SSR output 4-32VDC

And what i'm actually trying to accomplish is building a controller to control and log all aspects of brewing, as well as offer manual control with logging. I use a 3 vessel system so need to setup the Hot Liquor tank, Mash tun, and boil Kettle. My plan is to eventually build recipes with instructio...
by justinm001
Mon Jun 22, 2015 1:33 am
Forum: General discussion
Topic: control variable SSR output 4-32VDC
Replies: 14
Views: 3459

Re: control variable SSR output 4-32VDC

Let's get down to brass tacks here: You building an electric brewery there, friend? ;) The reason I ask is because I brew electric myself and, while I'm no expert, I've read a lot and built a couple of revisions of my own e-brewery. The RPi receives temp data and then controls the SSR via some form...
by justinm001
Fri Jun 19, 2015 9:16 pm
Forum: General discussion
Topic: control variable SSR output 4-32VDC
Replies: 14
Views: 3459

Re: control variable SSR output 4-32VDC

the element is a 5500w 240V and currently running using the SSR25DA and being controlled via simple PID. Looking to swap the PID with raspberry pi and/or arduino. the relay has a response time of ON<10MS, OFF<10ms which makes no sense at all to me. The datasheet PDF above has everything i can find o...
by justinm001
Fri Jun 19, 2015 7:05 pm
Forum: General discussion
Topic: control variable SSR output 4-32VDC
Replies: 14
Views: 3459

Re: control variable SSR output 4-32VDC

it shows only 7.5mA ad 12VDC for trigger current. im not certain if it uses 4-32V to control power level or it relys on cycle percentage to control how long its on. I found a couple builds doing similar things with arduino connected to raspberry pi and couple other items, so am attempting to build t...
by justinm001
Fri Jun 19, 2015 6:00 pm
Forum: General discussion
Topic: control variable SSR output 4-32VDC
Replies: 14
Views: 3459

Re: control variable SSR output 4-32VDC

now reading more and more, i might not need 4-32VDC variable but can use any voltage 4-32VDC with 7.5mA and it uses the cycle to control power level. no clue how that helps but picking up some parts and will pull out the voltmeter to test.
by justinm001
Fri Jun 19, 2015 3:43 pm
Forum: General discussion
Topic: control variable SSR output 4-32VDC
Replies: 14
Views: 3459

control variable SSR output 4-32VDC

I'm building a project to use temp sensors (ds18b20) to turn on and off a relay (heating element) and plan on using SSR-25DA to control power. I have info on how to read the temp sensors but not sure how to provide the power needed. Here's the datasheet http://www.datasheet-pdf.com/datasheetdownload...

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