105v trigger. - diyAudio
Go Back   Home > Forums > Design & Build > Construction Tips

Construction Tips Construction techniques and tips

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 10th September 2013, 10:23 AM   #1
back is offline back  Greece
diyAudio Member
 
Join Date: Nov 2005
Location: crete
Default 105v trigger.

hello. i have 4 solar panels series producing 120volt dc.i want a schematic with they go under 105v to start a power supply.

is there an easy way to do this?
  Reply With Quote
Old 10th September 2013, 11:24 AM   #2
diyAudio Member
 
Join Date: Dec 2012
Location: The Jurassic Coast, England. GB
Send a message via Skype™ to JonSnell Electronic
If you use a contactor rated at 24volts DC and a 1N5377BG Zener diode, when the voltage reaches approximately 15Volts plus the diode breakdown voltage (in this case 91v), the contactor will drop out connecting and the contacts will change for a power supply instead of the solar panels.
__________________
www.flyingmole.co.uk For World Wide support for Flying Mole, Class D, Refurbishment and Repairs. www.jonsnell.co.uk
  Reply With Quote
Old 10th September 2013, 01:09 PM   #3
back is offline back  Greece
diyAudio Member
 
Join Date: Nov 2005
Location: crete
Quote:
Originally Posted by JonSnell Electronic View Post
If you use a contactor rated at 24volts DC and a 1N5377BG Zener diode, when the voltage reaches approximately 15Volts plus the diode breakdown voltage (in this case 91v), the contactor will drop out connecting and the contacts will change for a power supply instead of the solar panels.
thanks a lot great info.
  Reply With Quote
Old 10th September 2013, 01:33 PM   #4
diyAudio Member
 
Osvaldo de Banfield's Avatar
 
Join Date: Dec 2011
Location: Barrio Garay,Almirante Brown, Buenos Aires, Argentina
I also have solar cells, but at 12V instead of 110V. The black box at the wall is a switching regulator designed of my own.
Attached Images
File Type: jpg Solar Cells 01.JPG (140.4 KB, 54 views)
File Type: jpg Solar Cells 02.JPG (142.5 KB, 54 views)
File Type: jpg Sun Power.JPG (124.1 KB, 54 views)
File Type: jpg Reguleta 01.JPG (119.8 KB, 53 views)
File Type: jpg Reguleta 02.JPG (138.1 KB, 53 views)
File Type: jpg Reguleta 03.JPG (144.8 KB, 17 views)
__________________
LW1DSE
  Reply With Quote
Old 10th September 2013, 02:21 PM   #5
back is offline back  Greece
diyAudio Member
 
Join Date: Nov 2005
Location: crete
mine are series connected or it would be easier.
  Reply With Quote
Old 10th September 2013, 02:37 PM   #6
diyAudio Member
 
Osvaldo de Banfield's Avatar
 
Join Date: Dec 2011
Location: Barrio Garay,Almirante Brown, Buenos Aires, Argentina
I have them wired in parallel. Almost all my radio station is sun powered. Also I have emergency lightning with the 12V system.
Attached Images
File Type: jpg Yaesus.JPG (141.2 KB, 18 views)
__________________
LW1DSE
  Reply With Quote
Old 10th September 2013, 06:23 PM   #7
back is offline back  Greece
diyAudio Member
 
Join Date: Nov 2005
Location: crete
it have 4x250watt.they were parallel until now and was producing 5kwh/day,almost all my house.but now i want to add two more because the winter is coming and the current would be huge so i changed to series connection.

p.s.i tried a 30v relay with 91v zener and it seems to work.i will do more testing tomorrow.
  Reply With Quote
Old 10th September 2013, 06:39 PM   #8
diyAudio Member
 
Osvaldo de Banfield's Avatar
 
Join Date: Dec 2011
Location: Barrio Garay,Almirante Brown, Buenos Aires, Argentina
I'm generating only 90Wpk by the moment :-D
__________________
LW1DSE
  Reply With Quote
Old 15th September 2013, 02:35 AM   #9
dangus is offline dangus  Canada
diyAudio Member
 
Join Date: May 2004
Location: Vancouver Island
Won't the panel voltage rise once the load is disconnected, causing the relay to behave like a buzzer? Maybe it's better to just isolate the panels with a rectifier. You can spare a diode drop, and DC will be prone to arcing if you don't use the right kind of contactor or some kind of semiconductor switch.

Last edited by dangus; 15th September 2013 at 02:47 AM.
  Reply With Quote
Old 16th September 2013, 12:30 PM   #10
diyAudio Member
 
Osvaldo de Banfield's Avatar
 
Join Date: Dec 2011
Location: Barrio Garay,Almirante Brown, Buenos Aires, Argentina
Yes. To avoid this effect in my regulator, I used a window comparator: starts charging at 20V and stops at 14V at the regulator's input.
__________________
LW1DSE
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
12v trigger olh Class D 4 27th July 2012 12:14 AM
Trigger for Amplifier Lovan Solid State 12 22nd September 2008 06:43 AM
12v UPS relays Trigger, 1 ~ 11v no trigger jacquesl Power Supplies 5 28th August 2007 05:30 PM
What is a trigger tube used for? Gunders Tubes / Valves 4 30th March 2003 01:53 AM


New To Site? Need Help?

All times are GMT. The time now is 06:33 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2