Where to Buy Timed Relay/Switch

Submitted: Thursday, Apr 07, 2016 at 11:43
ThreadID: 132050 Views:1646 Replies:9 FollowUps:15
This Thread has been Archived
My small cubby fridge in my centre console runs on straight 12v and I have accidently left it on a couple of times with a flat battery resulting.

I could change it to switched 12v but that means it will be off whenever the ignition is not on. Likewise I could use a voltage cutout switch but this means that the fridge could stay on for a long time before switching off and am not keen on this and would like greater control.

The ideal is a relay that has 12v and switched 12v and inbuilt timer so that when switched 12v is turned off the unit continues to run on the 12v for the set time before switching off.

I have seen these listed overseas but I have not found nothing here. I have checked Jaycar and they do not any but have a straight on/off timer but that is not what I am looking for.

As you can see I am aware of other options but looking at my preferred one first.

Any ideas on where to buy this type of relay??

Thanks

Garry
Back Expand Un-Read 0 Moderator

Reply By: Malcom M - Thursday, Apr 07, 2016 at 12:05

Thursday, Apr 07, 2016 at 12:05
Low voltage cutout $13.50 delivered

http://www.aliexpress.com/item/Low-Voltage-Disconnect-Module-LVD-12V-10A-Protect-Prolong-Battery-Life/32556819497.html?spm=2114.01010208.3.30.6v2L9V&ws_ab_test=searchweb201556_9,searchweb201602_3_10036_10035_10034_507_10020_2030014_10001_10002_10017_10010_10005_10011_10006_10003_10021_10004_10022_10009_10008_10018_10019,searchweb201603_9&btsid=8185aaa3-34c2-4384-ad2c-a04e1b30160e
AnswerID: 598296

Follow Up By: garrycol - Thursday, Apr 07, 2016 at 18:43

Thursday, Apr 07, 2016 at 18:43
Thanks but as indicated in my post that is not what I am looking for - yes an option if I cannot find what I need.

cheers

Garry
0
FollowupID: 867489

Reply By: Grizzle - Thursday, Apr 07, 2016 at 13:02

Thursday, Apr 07, 2016 at 13:02
http://www.12voltplanet.co.uk/adjustable-delay-timer-relay-delay-on-or-off-12v-10a.html

Is this the type of relay?

Lifetime Member
My Profile  Send Message

AnswerID: 598299

Follow Up By: garrycol - Thursday, Apr 07, 2016 at 19:03

Thursday, Apr 07, 2016 at 19:03
I am not sure but I dont think so - it looks as if the timer starts when there is a 12v pulse where my switched 12v will be switching off. I need to investigate further.

The 60 min timer is the sort of time I am looking for it to stay on though.

Thanks

Garry
0
FollowupID: 867491

Follow Up By: Grizzle - Friday, Apr 08, 2016 at 12:09

Friday, Apr 08, 2016 at 12:09
Hi Garry,

Just looked at this again and I think it will do what you want.

The text below is taken from the description.

Note: If a continuous rather than momentary input signal is provided, the timer will commence when the signal is removed.

Lifetime Member
My Profile  Send Message

1
FollowupID: 867529

Follow Up By: garrycol - Friday, Apr 08, 2016 at 13:35

Friday, Apr 08, 2016 at 13:35
Oh - Ok missed that - then yes it may very well - I will go back an have a closer look.

Just had a closer look - if it works as that wording indicates - that is exactly what I am after.

Thanks
Garry
0
FollowupID: 867530

Reply By: HKB Electronics - Thursday, Apr 07, 2016 at 16:32

Thursday, Apr 07, 2016 at 16:32
Have a look at Ebay, there are lots of timer modules on there you can program for either a delayed turn on of turn off such as:
Link to timer

Lifetime Member
My Profile  Send Message

AnswerID: 598312

Follow Up By: garrycol - Thursday, Apr 07, 2016 at 19:07

Thursday, Apr 07, 2016 at 19:07
Thanks for the link but I have to admit that after reading the description I am none the wiser as to whether this suits my needs or not.

Thanks

Garry
1
FollowupID: 867492

Follow Up By: vk1dx - Friday, Apr 08, 2016 at 07:40

Friday, Apr 08, 2016 at 07:40
Garry. I have to agree about the description. The english used these days is very bad, but that one takes the cake. It looks like a "machine" translation.

I have a feeling that it would do the job for you. Maybe HKB or what ever the name is can help.

Phil
0
FollowupID: 867513

Reply By: Malcom M - Friday, Apr 08, 2016 at 06:40

Friday, Apr 08, 2016 at 06:40
Is this what you want to do?
1/ power on car and fridge powers up at the same time
2/ power off car but fridge continues to run for xx minutes then switches off
You are not likely to find that off the shelf as it will require some rewiring of the vehicle.
The idea is simple enough but you need a 12v ignition feed plus a 12v battery direct feed.
HKB's module ill likely do the job in mode 5 or 6 along with some rewiring.
AnswerID: 598335

Follow Up By: vk1dx - Friday, Apr 08, 2016 at 07:46

Friday, Apr 08, 2016 at 07:46
I don't think that the car wiring needs to be changed Malcom. But the module and a few components would have to be installed safely in a box between both the accessory +12 and the car's 12V "allways on" power. The trick is to get a pulse to indicate that the car has been turned on. A simple electrolytic cap, with or without a resistor, on the accessory line would do that. The standard module would then work as is. Not sure about which mode though.

But not a job for a novice and maybe even some auto electricians would find it hard to get their heads around.

Phil
0
FollowupID: 867514

Reply By: Member - Stuart P (WA) - Friday, Apr 08, 2016 at 07:45

Friday, Apr 08, 2016 at 07:45
try a turbo timer, redarc do timer relays as well
AnswerID: 598336

Reply By: vk1dx - Friday, Apr 08, 2016 at 07:59

Friday, Apr 08, 2016 at 07:59
Garry

I have posted a few words above but am puzzled why you need this setup. We installed an additional battery and a Redarc isolator under the bonnet to supply power for all 4wd and camping accessories, including camp lighting, driving and fog lights. Why not do the same with your console fridge. The Redarc isolator will protect the crank for you. Maybe a small 12 V battery from a small car or motorbike (are they 12V) and the small isolator. Then you have power for other small accessories down the track. Maybe even put the CB on the circuit.

If you take a battery to the bush in the car then you would have to do this anyway.

Personally, if I was going to be away from the car for a long time, then I would turn the fridge off. This is what a lot of us do with the CB when power directly from the battery.

Phil
AnswerID: 598338

Follow Up By: garrycol - Friday, Apr 08, 2016 at 10:51

Friday, Apr 08, 2016 at 10:51
Thanks Phil - I dont have a second battery or isolator - this is the OEM fridge in the center console - has a simple switch to turn on and off and a few times I have left it on and flattened the battery a couple of times.

From the responses it would seem what I am after does not exist locally as a single unit so I will most likely put in a low voltage cutout and continue to turn it on and off manually and if I forget, the low voltage cutout will come in to play.

Cheers
1
FollowupID: 867525

Follow Up By: vk1dx - Friday, Apr 08, 2016 at 11:07

Friday, Apr 08, 2016 at 11:07
I was wondering if the user handbook has any ideas or hints.

Phil
0
FollowupID: 867526

Follow Up By: garrycol - Friday, Apr 08, 2016 at 13:44

Friday, Apr 08, 2016 at 13:44
The car handbook just says to switch the unit on when needed and switch off when not needed and a warning that leaving it on without the engine running may result in a flat battery.

However the relay that Grizzle linked to above seems to be what I wanted so I will print that page and see if Ashdowns or other car electronic specialists can supply.

Cheers

Garry
1
FollowupID: 867531

Follow Up By: Member - ACD 1 - Friday, Apr 08, 2016 at 14:10

Friday, Apr 08, 2016 at 14:10
Finally!

A Vehicle User Manual that has simple to follow and accurate information.

Sorry Gary, I just loved your description and couldn't let it go past.

If a constant on supply is needed to trigger the timer, it won't be hard to find - usually one of the wires into the clock, radio etc will be constant to supply the memory.

Cheers

Anthony
VKS 3539
Work - a 40 hour interuption to my weekend!
Too many places - too little time

Member
My Profile  My Position  Send Message

0
FollowupID: 867533

Follow Up By: garrycol - Saturday, Apr 09, 2016 at 20:11

Saturday, Apr 09, 2016 at 20:11
Yes wiring is not such an issue - piggy back fuse on the main fuse box will do the trick.
0
FollowupID: 867579

Follow Up By: vk1dx - Saturday, Apr 09, 2016 at 20:52

Saturday, Apr 09, 2016 at 20:52
See my post below.
0
FollowupID: 867582

Reply By: peteC - Friday, Apr 08, 2016 at 21:40

Friday, Apr 08, 2016 at 21:40
If you ask the right person he could walk down to his shed and make you one
AnswerID: 598385

Follow Up By: garrycol - Saturday, Apr 09, 2016 at 20:12

Saturday, Apr 09, 2016 at 20:12
Well what is stopping you? :-)
0
FollowupID: 867580

Reply By: TomH - Saturday, Apr 09, 2016 at 19:16

Saturday, Apr 09, 2016 at 19:16
You could buy one of these and use it to switch a relay for your fridge as these are only used for dashcams.

http://dashcamsaustralia.com.au/shop/dashcams/blackvue/powermagic-hard-wiring-kit/

Can set it for time or voltage or both

I have 2 of them and they work fine with the cameras
AnswerID: 598419

Follow Up By: garrycol - Saturday, Apr 09, 2016 at 20:16

Saturday, Apr 09, 2016 at 20:16
Thanks - that should work well on the timer function.
0
FollowupID: 867581

Reply By: vk1dx - Saturday, Apr 09, 2016 at 21:00

Saturday, Apr 09, 2016 at 21:00
This may be abit of overkill for just one circuit but it allows for easy expansion and extra ccts in the future. And makes fault finding 100% easier. You don't have to climb around the car looking for the fuse.

I put one in my car for all accessories such as lights, camp lighting, fridges, radio etc. I also mounted some relays nearby for driving and fog lights and a spare.

From Jaycar, 100 max with 10 ccts at 30 amp max each one. Fused as you wish.

Phil


AnswerID: 598422

Sponsored Links

Popular Products (13)