Comments on: Pocket High Voltage Generator Upgrade https://blog.theledart.com/blog/pocket-high-voltage-generator-upgrade/ Art and Technology are Friends Tue, 18 Aug 2020 10:01:26 +0000 hourly 1 http://wordpress.org/?v=3.9.1 By: Hank https://blog.theledart.com/blog/pocket-high-voltage-generator-upgrade/comment-page-1/#comment-118280 Thu, 07 Feb 2019 07:34:02 +0000 https://blog.theledart.com/blog/?p=2174#comment-118280 After searching through my junk box for good transistors I came up with the 2SD669A for Q2.
Another one I will try whenever I order parts is the SFT1202E.

This is a great project but I found it gives low readings for zener diodes under about 80V, changing R5 to 68k gives it about a 1 ma short circuit output which helps.

It runs great on a AAA battery.

Thanks for posting this. Nicely done.

]]> By: Javier https://blog.theledart.com/blog/pocket-high-voltage-generator-upgrade/comment-page-1/#comment-113069 Tue, 27 Nov 2018 01:56:18 +0000 https://blog.theledart.com/blog/?p=2174#comment-113069 Thanks!

]]> By: The LED Artist https://blog.theledart.com/blog/pocket-high-voltage-generator-upgrade/comment-page-1/#comment-113034 Mon, 26 Nov 2018 02:15:23 +0000 https://blog.theledart.com/blog/?p=2174#comment-113034 L1 is 9 mm or larger drumcore, at least 0.5A rated.
D1-D3 can be 1N4181 type, 100V. I know this doesn’t give any margin so you might want to use ultrafast recovery diodes rated at higher voltage.
D4 can be pretty much any zener of the same voltage.

]]> By: The LED Artist https://blog.theledart.com/blog/pocket-high-voltage-generator-upgrade/comment-page-1/#comment-113033 Mon, 26 Nov 2018 02:04:49 +0000 https://blog.theledart.com/blog/?p=2174#comment-113033 400-450V… That’s a bit higher than I’ve ever needed. I think you can add more multiplier stages to get that voltage, if you only need a couple of milliamps.
Please look at the MOSFET version of simple HV generator circuit posted here: https://blog.theledart.com/blog/archives/2115

This circuit needs at least 10V input, but you should be able to get around 400V by adding a capacitive doubler.

]]> By: Javier https://blog.theledart.com/blog/pocket-high-voltage-generator-upgrade/comment-page-1/#comment-113027 Sun, 25 Nov 2018 23:15:05 +0000 https://blog.theledart.com/blog/?p=2174#comment-113027 Could you provide manufacturer part numbers or rating info for the diodes and the inductor?
Thanks!

]]> By: Mac Ha Nguyen https://blog.theledart.com/blog/pocket-high-voltage-generator-upgrade/comment-page-1/#comment-113006 Sun, 25 Nov 2018 07:36:40 +0000 https://blog.theledart.com/blog/?p=2174#comment-113006 Thanks for a very simple and interesting design! I was looking for long time for something like this to test the geiger tubes… Could you advise what needs to be changed for 400-450 V output? Specifically on the requirements for the transistors, diodes and C2, C3, C4 capacitors. Sorry I’m not a specialist on HV… Thank you very much in advance.

]]> By: Mitek https://blog.theledart.com/blog/pocket-high-voltage-generator-upgrade/comment-page-1/#comment-112987 Sat, 24 Nov 2018 02:08:31 +0000 https://blog.theledart.com/blog/?p=2174#comment-112987 Look interesting !
i use HV857 for high voltage but this schematics easy and cheapest.

Thanks !

]]> By: Pocket high voltage generator upgrade – gStore https://blog.theledart.com/blog/pocket-high-voltage-generator-upgrade/comment-page-1/#comment-112983 Sat, 24 Nov 2018 00:09:23 +0000 https://blog.theledart.com/blog/?p=2174#comment-112983 […] posted an update on his pocket high voltage generator project we covered […]

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