| Author |
Message |
Dave Arney
Unregistered guest
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| Posted on Sunday, March 4, 2007 - 2:43 pm: |
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I need a switch.
I have two 12 volt rechargeable batteries fully charged. One is to be connected to an Inverter to boost it up to 230volts to run lights. One battery will not last for the length of time needed but two will. So I want a switch that both batteries can be connected to with a lead going to the Inverter so that when the first battery runs out I can simply flick a swith to bring the second one on line.
Can you supply such a switch.
Thanks
Dave Arney |
Admin (Admin)
Board Administrator
Username: Admin
Post Number: 421
Registered: 10-2004
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| Posted on Tuesday, March 6, 2007 - 7:25 pm: |
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Hello Dave,
We do not carry general purpose switches although we do have power connectors that could be used. One important figure you did not mention is the switching current? Will you be turning the inverter off when changing batteries as that will influence the switch rating? |
bobd
Unregistered guest
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| Posted on Monday, October 22, 2007 - 11:44 am: |
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Hi Technical
I am trying to find a 3 position DPDT Rocker switch with centre off. The swith must automaticaly jump to the centre off position when not depressed, just the same as a lot of car electric window operating switches. Maplins cant supply such a switch. Could you sugest anyone.
Thanks |
Admin (Admin)
Board Administrator
Username: Admin
Post Number: 609
Registered: 10-2004
|
| Posted on Monday, October 22, 2007 - 7:11 pm: |
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Bob,
This is quite a common switch and should only cost a pound or two from suppliers such as RS Components. Check out their part number 495-4232 as an example. |
John Rankin
Unregistered guest
|
| Posted on Wednesday, June 18, 2008 - 6:57 pm: |
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I need a replacement for a microswitch that controls a water pump. 230V single phase, 400W load. The spring-loaded actuating bar protrudes beyond the body; when the bar is pulled towards the body of the switch the circuit is opened.
I will try to append a pic. Can you help me please?  |
Admin (Admin)
Board Administrator
Username: Admin
Post Number: 812
Registered: 10-2004
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| Posted on Thursday, June 19, 2008 - 7:04 am: |
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John,
We do not stock a direct replacement but our V3 size switches should be able to handle the load, see http://www.technobots.co.uk/acatalog/Online_Catalogue_Microswitches_364.html. The switches have a change over contact so that will give the correct switching operation. You can choose the length of the lever, it can always trim it if it is too long. The main problem for your application is that each switch has one of its contacts on the bottom.
Hope that is of some interest. |
Andy
Unregistered guest
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| Posted on Saturday, August 16, 2008 - 3:08 pm: |
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I'm not technically minded so here goes..
Do you do a micro toggle switch that I can use. (momentary switches one way only) IE the switch needs to be in the lower position with a lever against it (against the spring action) so that when I move the lever away it switches the switch off like wise when the lever moves back it pushes the switch down again against the spring to open the circuit again. The attachment shows a switch that will do the job but no idea where it came from
Regards
Andy
 |
Admin (Admin)
Board Administrator
Username: Admin
Post Number: 853
Registered: 10-2004
|
| Posted on Monday, August 18, 2008 - 1:47 pm: |
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Andy,
Yes we do have toggle switches like you describe. See http://www.technobots.co.uk/acatalog/Online_Catalogue_Toggle_Switches_43.html and look for the term (on) which means momentary action i.e. not latching / spring return. Normally you would use a microswitch for that type of application, see http://www.technobots.co.uk/acatalog/Online_Catalogue_Microswitches_364.html for our range of these. |
Steve (Extreme)
Member
Username: Extreme
Post Number: 1
Registered: 9-2009
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| Posted on Monday, September 28, 2009 - 7:26 pm: |
|
12V 20A DPDT Centre Off Toggle Switch - Part No: 1610-101
http://www.technobots.co.uk/cgi-bin/ss000002.pl?page=search&PR=-1&TB=A&SS=1610-1 01&ACTION=search
Will the above switch spring return to centre, thus only being momentary contact if pusher in either direction? |
Admin (Admin)
Board Administrator
Username: Admin
Post Number: 1124
Registered: 10-2004
|
| Posted on Tuesday, September 29, 2009 - 9:44 pm: |
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No, it's latching. The only spring return type we do is the miniature toggle type. Spring return is indicated by (on). |
keith cliffe
Unregistered guest
|
| Posted on Thursday, February 18, 2010 - 11:26 am: |
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hi i recently bought off you some dpdp which are fantastic,i am building a points control box for a model train layout and need a bit of advice if you can help,what it is i need a swich that will give a qwick burst of current to change the point over but all stay on so my leds can show me which way the points are facing can you help in any way
keith |
Admin (Admin)
Board Administrator
Username: Admin
Post Number: 1208
Registered: 10-2004
|
| Posted on Thursday, February 18, 2010 - 9:30 pm: |
|
Keith, Not sure that I understand what you are asking. A switch is either open or closed so cannot in itself give a quick burst of energy. You say "all stay on so me LED's..." can you explain what you mean by this.
Not being a train enthusiast, I will still hazard a guess at what you are trying to achieve. You have a switch that operates the points with two positions. The switch stays put in each position (i.e. is not spring return or momentary), you have LED's connected to either side of the switch to show the points position. Assuming the points are spring return, you just need a burst of energy to switch over and then a holding current to keep them there. One way of giving a burst of energy and then a holding current is to have a resistor with a value to determine the holding current and connected in parallel with the resistor would be a large value capacitor. The value of capacitor would need to be either calculated or experimented with as it depends on how much current the points take and how long they take to move. If the points are not spring return, then it is be bit more complicated, if this is the case, do you have a sketch of your wiring that you can post on the forum so we can take a look. |
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