Cathode tubes and 12V DC supply?

[Guest]

Hey just bought some cathode tubes from ebuyer (2 connected to one molex) but they're molex connection, if I were to connect these to a 12V power supply do I just disconnect the black and yellow wires, remove the end of the power supply then just connect the cables together? Thanks, Adam.

Link to cathodes : http://www.ebuyer.com/product/51686

Link to DC supply: http://cgi.ebay.co.uk/12V-1-25A-AC-DC-power-supply-adapter-CCTV-camera-/270746082347?pt=UK_ConsumerElectronics_PowerAdaptors_SM&hash=item3f09b95c2b

 

[Guest]

Anyone got any idea?

 

[ghnader hsmithot]

Dont know how much cathode tube current draws.

 

[Fokissed]

The cathode tube should work on any 12v supply under ~10A.

 

[ko888]

Each tube would be plugged into the inverter. You would wire the inverter's 12 Volt input to the 12V power supply.

The inverter has an output voltage of 680 Volts.

I would guess that the 12 Volt total current draw should be under 0.6 Amps when using both tubes.

 

[Guest]

Each tube would be plugged into the inverter. You would wire the inverter's 12 Volt input to the 12V power supply.

The inverter has an output voltage of 680 Volts.

I would guess that the 12 Volt total current draw should be under 0.6 Amps when using both tubes.

how would I go about connecting them together, just splice the cables on both then join the inverter cables to the power adapter cables? Thanks for your replies!

 

[delluser1]

Each tube would be plugged into the inverter. You would wire the inverter's 12 Volt input to the 12V power supply.

The inverter has an output voltage of 680 Volts.

I would guess that the 12 Volt total current draw should be under 0.6 Amps when using both tubes.

You would guess ? I don't believe that.
You did the math and know that it's 6.8 watts total, fess up :lol: .

 

[ko888]

how would I go about connecting them together, just splice the cables on both then join the inverter cables to the power adapter cables? Thanks for your replies!

It depends on if you want to keep the ON/OFF switch for turning your CCFLs on or off.

One end of the inverter has a single two-pin +12 Volt input connector. The other end of the inverter has two 680 Volt output connectors, one for each CCFL.

 

[Guest]

So if I wanted to connect it to that power supply I linked to in the first post and keep the power button, I'd cut the end of that supply off, to get two wires, then cut off the two I circled in the following picture off the cathode kit, then connect those two with the two from the supply? (dont know much about voltages and stuff just need to know if it will work )


http://imageshack.us/photo/my-images/33/p1010545copy.jpg/

 

[ko888]

So if I wanted to connect it to that power supply I linked to in the first post and keep the power button, I'd cut the end of that supply off, to get two wires, then cut off the two I circled in the following picture off the cathode kit, then connect those two with the two from the supply? (dont know much about voltages and stuff just need to know if it will work )


http://imageshack.us/photo/my-images/33/p1010545copy.jpg/

Exactly. Splice the yellow lead from the wiring assembly to the positive lead of the AC to DC adapter and the black lead from the wiring assembly to the negative/ground lead of the AC to DC adapter.

 

[Guest]

thanks, I can get around to getting it all done now! Thanks for your help!

 

[Guest]

Exactly. Splice the yellow lead from the wiring assembly to the positive lead of the AC to DC adapter and the black lead from the wiring assembly to the negative/ground lead of the AC to DC adapter.

One more question , will an output of 1A be enough instead of 1.25A as I've found this cheaper adapter, and if it'll do the job might aswell! Will that loss of 0.25A make any diference in brightness etc...?


http://cgi.ebay.co.uk/UK-DC-12V-1A-Switching-Power-Supply-adapter-100-240V-AC-/190528547117?pt=UK_Computing_LaptopAccessories_PowerSupplies&hash=item2c5c62e92d

 

[ko888]

One more question , will an output of 1A be enough instead of 1.25A as I've found this cheaper adapter, and if it'll do the job might aswell! Will that loss of 0.25A make any diference in brightness etc...?


http://cgi.ebay.co.uk/UK-DC-12V-1A-Switching-Power-Supply-adapter-100-240V-AC-/190528547117?pt=UK_Computing_LaptopAccessories_PowerSupplies&hash=item2c5c62e92d

I have no idea what the quality of those adapters are like. If they can really deliver their claimed DC output current then that's good.

The CCFLs will only draw the current that they require. For example, if the two CCFL tubes require 0.57 Amps from the 12 Volt source then that is what it will draw. The other 0.43 Amps (i.e. assuming you're using the one with up to 1 Amp output) is unused or in reserve if needed.

 

[Guest]

Ah thanks, well I'll give it a go, if it works at that price I'll be happy!