High Voltage using parts from a TFT Screen?

[Magnethos]

I have a TFT Monitor broken, from my computer. I read that I can use some parts to build a high voltage suply.
Can I use some part of this screen monitor to make a high voltage supply? I mean, connect 12 Volt battery and get a high amount of voltage.

[antibyte]

The small PCB on the bottom of the picture with the coils
on it is the inverter.
Left and right are the outputs, center cable is suppy and control.
But you will only get about 300-400 Volts output from that.

[orbs]

Can I use some part of this screen monitor to make a high voltage supply?

Possibly. But be aware that the inverter is usually using an integrated circuit that has several protection mechanisms built in. For example, it shuts down if both the output is not connected or if it draws too much current. Also, CCFL (cold cathode fluorescent lamp)s are current controlled, not voltage controlled, and the output frequency is somewhere around 60 kHz, so your meter might not display correct values. The picture below is the little circuit board from a notebook and uses an MP1015EM, just to get an idea. The middle part contains several SMD (surface-mount device) LED (light-emitting diode)s that are not part of the actual inverter. The initial strike voltage can be up to 1 kV, so use caution.

[Vortex1]

Old laser printers and copy machines have nice little electrostatic HV power supplies, usually with both positive and negative outputs of several kV as well as a wealth of other parts that will keep you busy for a long time...stepper motors etc..

You will have to experiment carefully to determine the proper input connections. I recommend limiting the current input with a small lamp until you find the connections that give you some output. Usually there is a line to gate the output on and off. This may have to .be tied to V+ or ground.

...V