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by marcusvanr
Sat Jan 06, 2018 6:48 pm
Forum: Raspberry Pi Desktop for PC and Mac
Topic: PiServer in "industrial" home environment use
Replies: 1
Views: 375

Re: PiServer in "industrial" home environment use

We’re looking into: MINIX NEO Z83-4 PC as our X86 server.

Doesn't have fan cooling, but runs silent 24/7. Comes with 32 gb eMMC storage (may need to add SSD via USB).

Any thoughts ?
by marcusvanr
Sat Jan 06, 2018 6:43 pm
Forum: Raspberry Pi Desktop for PC and Mac
Topic: PiServer in "industrial" home environment use
Replies: 1
Views: 375

PiServer in "industrial" home environment use

Hi... I wrote this within Gordon's PiServer Forum comments earlier today: I’m working on touchscreen Pi for A/C climate control for each bedroom and zone in a large house ( 10 PIs in building ). Node.JS in each Pi will serve React/HTML into Chrome “kiosk mode”, which hooks to a central MySQL reposi...
by marcusvanr
Thu Nov 17, 2016 4:28 pm
Forum: Official Foundation Display
Topic: rpi-backlight: Control over display brightness and power
Replies: 25
Views: 15684

Re: rpi-backlight: Control over display brightness and power

I checked with my v1.0 Display: -- turned screen "off" and I could not get the screen to turn back on... -- edited: /sys/class/backlight/rpi_backlight $ nano brightness -> found if I lower brightness to 30 the screen turns off -> raised the brightness above 230 the screen turns on again Conclusion, ...
by marcusvanr
Sun Oct 23, 2016 12:56 pm
Forum: Automation, sensing and robotics
Topic: Creating a 0-10V voltage range for ballasts
Replies: 38
Views: 18690

Re: Creating a 0-10V voltage range for ballasts

I tested, It work good. (0.02 - 9.98V) But pls help me for sure with GROUND connect, now I connect all ground together, it right? I think RasPi have more temperature, or my felling bad. Yes, I finally used the same ground for everything connected. Was surprised about the valve's ground, as it works...
by marcusvanr
Fri Oct 16, 2015 5:27 pm
Forum: Automation, sensing and robotics
Topic: Creating a 0-10V voltage range for ballasts
Replies: 38
Views: 18690

Re: Creating a 0-10V voltage range for ballasts

My (updated) Fritzing file to create the boards for 0-10v voltage range -- 2 channel using LM358

Marcus
by marcusvanr
Fri Oct 16, 2015 5:22 pm
Forum: Automation, sensing and robotics
Topic: Creating a 0-10V voltage range for ballasts
Replies: 38
Views: 18690

Re: Creating a 0-10V voltage range for ballasts

Components on board... I took advantage of the 2x channels of the LM358 chip, as I wanted to control a 3-way water valve, as well as motor speed of fan coil for our "chiller" A/C system. You see one 12v power source to generate the 0-10v signal, then two 0-10v output terminals. The PDM circuits are ...
by marcusvanr
Fri Oct 16, 2015 5:13 pm
Forum: Automation, sensing and robotics
Topic: Creating a 0-10V voltage range for ballasts
Replies: 38
Views: 18690

Re: Creating a 0-10V voltage range for ballasts

The Fritzing boards arrived !
by marcusvanr
Tue Oct 06, 2015 4:47 pm
Forum: Automation, sensing and robotics
Topic: Creating a 0-10V voltage range for ballasts
Replies: 38
Views: 18690

Re: Creating a 0-10V voltage range for ballasts

Hi Dan, & Doug, Thank you for your good advice and reassuring me on placing a "hot" 24v AC wire to ground with the more delicate electronics. When I wire this up into our house, I'll be sure to set "ground" to coincide with earth at the circuit breaker. I tried this out right away, using one "common...
by marcusvanr
Mon Oct 05, 2015 4:23 pm
Forum: Automation, sensing and robotics
Topic: Creating a 0-10V voltage range for ballasts
Replies: 38
Views: 18690

Re: Creating a 0-10V voltage range for ballasts

Hi everyone, I was able to replicate Dan's design for a 0-10 volt controller, which gives me a perfect 0-10 v reading on my volt meter. I just ordered some Fritzing boards, and hope to build several small devices to go with RPi and touch-screen to control A/C units in every room... One of the device...
by marcusvanr
Tue Sep 22, 2015 8:14 am
Forum: Automation, sensing and robotics
Topic: Creating a 0-10V voltage range for ballasts
Replies: 38
Views: 18690

Re: Creating a 0-10V voltage range for ballasts

Hi Dan, Big thanks for the new drawing. As soon as I receive parts I ordered, I'll set this up on a breadboard and then do a Fritzing drawing to post back here. Our application needs two 1-10v controls within boxed A/C "fan coils" (one for motor speed and another for 3-way valve on the chiller's pip...
by marcusvanr
Mon Sep 21, 2015 11:09 am
Forum: Automation, sensing and robotics
Topic: Creating a 0-10V voltage range for ballasts
Replies: 38
Views: 18690

Re: Creating a 0-10V voltage range for ballasts

Hi Dan, You posted some time ago the solution with a LM358, along with photo and changes to your original diagrams : capacitor to 1µF and the 240K to 200K ... load resistor (1K ohm) to get 0V at the output. Is there a chance you could post a new diagram with these changes ? Many thanks, Marcus -----...

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