low cost, small, safe bias supply

I_Forgot · 22nd October 2005, 08:37 PM

5VDC in 1500VAC out- $5

See here:
http://tinyurl.com/8q9uo

Manual here:
http://tinyurl.com/9johs

Easily multiplied to 3 kVDC or higher with a few diodes and capacitors.

I_F

BillH · 22nd October 2005, 11:31 PM

Great find.

The CCFL inverter in general seem to be a standard DC to AC converter. Even though they are made for a fluorescent lamp, there isn't any special starting voltage or current produced, just high voltage AC. Small, cheap and readily available from many online sources. The inverter you linked even has provision for soft on-off switching.

Here's a pdf file describing CCFL inverter design.

dstockwell · 23rd October 2005, 03:00 PM

Interesting, looks like one of those would work just fine, 1500VDC out is enough.

I_Forgot · 23rd October 2005, 08:08 PM

The output is AC. You still need to rectify it and don't forget the big series resistance.

Use one HV diode, a small HV capacitor (try 100 pF to 1 nF), and 10M-100M resistor in series with the output.

I_F

dstockwell · 23rd October 2005, 08:19 PM

well guess i messed that one up.

I_Forgot · 23rd October 2005, 09:48 PM

Very simple. Any HV diode rated for 5 kV should be OK.

I_F

dstockwell · 23rd October 2005, 11:57 PM

Great thanks.

I_Forgot · 25th October 2005, 12:37 AM

I forgot...

That circuit will provide about 2100 VDC.

I_F

dstockwell · 10th November 2005, 03:37 PM

OK, I got stupid ?.... I searched on mouser for 5K diode, no 5K diode but I get 5K rectifier, is rectifier what I want .

Calvin · 10th November 2005, 04:48 PM

Hi,

just connct several 1kV-Diodes in series, eg. 1N400x

jauu
Calvin

22nd October 2005, 08:37 PM	#1
I_Forgot diyAudio Member Join Date: Jan 2005 Location: Phoenix, Az.	low cost, small, safe bias supply 5VDC in 1500VAC out- $5 See here: http://tinyurl.com/8q9uo Manual here: http://tinyurl.com/9johs Easily multiplied to 3 kVDC or higher with a few diodes and capacitors. I_F

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22nd October 2005, 11:31 PM	#2
BillH diyAudio Member Join Date: Mar 2005 Location: Wisconsin	Great find. The CCFL inverter in general seem to be a standard DC to AC converter. Even though they are made for a fluorescent lamp, there isn't any special starting voltage or current produced, just high voltage AC. Small, cheap and readily available from many online sources. The inverter you linked even has provision for soft on-off switching. Here's a pdf file describing CCFL inverter design.

23rd October 2005, 03:00 PM	#3
dstockwell diyAudio Member Join Date: Jul 2005 Location: Georgia	Interesting, looks like one of those would work just fine, 1500VDC out is enough.

23rd October 2005, 08:08 PM	#4
I_Forgot diyAudio Member Join Date: Jan 2005 Location: Phoenix, Az.	The output is AC. You still need to rectify it and don't forget the big series resistance. Use one HV diode, a small HV capacitor (try 100 pF to 1 nF), and 10M-100M resistor in series with the output. I_F

23rd October 2005, 08:19 PM	#5
dstockwell diyAudio Member Join Date: Jul 2005 Location: Georgia	well guess i messed that one up.

23rd October 2005, 11:57 PM	#7
dstockwell diyAudio Member Join Date: Jul 2005 Location: Georgia	Great thanks.

25th October 2005, 12:37 AM	#8
I_Forgot diyAudio Member Join Date: Jan 2005 Location: Phoenix, Az.	I forgot... That circuit will provide about 2100 VDC. I_F

10th November 2005, 03:37 PM	#9
dstockwell diyAudio Member Join Date: Jul 2005 Location: Georgia	OK, I got stupid ?.... I searched on mouser for 5K diode, no 5K diode but I get 5K rectifier, is rectifier what I want .

10th November 2005, 04:48 PM	#10
Calvin diyAudio Member Join Date: Nov 2004 Location: close to Basel	Hi, just connct several 1kV-Diodes in series, eg. 1N400x jauu Calvin

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