High Voltage 555 timer circut  - Page 1
Forum section: electronics / beginners

author: Jbliss
author_rank: Regular Contributor
timestamp: April 21, 2015, 12:52:31 pm
content: Anyone have any recommendations for a 555 High voltage timer circut that you have tested and know work. preferably with easily accessible partscheers JBliss

author: Jbliss
author_rank: Regular Contributor
timestamp: April 21, 2015, 01:27:34 pm
content: anyone

author: sean0118
author_rank: Frequent Contributor
timestamp: April 21, 2015, 01:33:45 pm
content: What's the application and what do you consider high voltage?

author: 128er
author_rank: Regular Contributor
timestamp: April 21, 2015, 01:39:15 pm
content: Not trivial to interface a 555 with 10 kVWhat are your requirements? Switching mains? Or the high voltage power line in your neighbourhood? I would assume for some people here, anything above 3.3V is high voltage.Please give more informations. For what application. What Supply voltage. Type of load. Prefered switching method. 555 circuit arrangement, e.g. astable, monostable, etc.

author: Jbliss
author_rank: Regular Contributor
timestamp: April 21, 2015, 01:52:14 pm
content: High voltage as in 20 Kv or 10 Kv for a shock.powered by a 9v battery

author: 128er
author_rank: Regular Contributor
timestamp: April 21, 2015, 02:12:39 pm
content: Is it just me, or . . . . errhhh

author: Seekonk
author_rank: Super Contributor
timestamp: April 21, 2015, 02:21:43 pm
content: And here I thought I'd have a chance to talk about an IR half bridge chip. I bought a few thinking this could be neat. Never have found a use. 600V 2A 555 50% duty cycle, just add a resistor and cap for timing.

author: janoc
author_rank: Super Contributor
timestamp: April 21, 2015, 03:24:43 pm
content: Quote from: Jbliss on April 21, 2015, 01:52:14 pmMate, you obviously don't know anywhere near enough to tinker with voltages like that. I strongly suggest you stay away from them for your own and your (still) friends sake.

author: Zero999
author_rank: Super Contributor
timestamp: April 21, 2015, 07:29:41 pm
content: Google for 555 flyback driver.Don't shock people, it's dangerous and can get you in a lot of trouble.

author: klr5205
author_rank: Regular Contributor
timestamp: April 21, 2015, 08:19:04 pm
content: woah - I wouldn't point this guy towards a flyback driver.I remember a unit in middle school where they let us make a little shocker that was camouflaged as a pack of gum so you could offer your victim a piece and give them a start when they pulled on it. You can question the teacher's judgement but it was far from dangerous.I imagine that had a little piezoelectric igniter element in it... but at that level it was more of a craft project and they didn't really explain how it worked.You could also discharge a capacitor (say 22uF at 3-6V?) through a step-up transformer and deliver a few hundred micro-joules.

author: Jbliss
author_rank: Regular Contributor
timestamp: April 22, 2015, 07:37:15 am
content: Hi Just wondering if this would work?no need to question my knowledge or be rude please. this is a beginner section of the forumBTW its not to shock someone its for testing!!!!

author: MMDuino
author_rank: Regular Contributor
timestamp: April 22, 2015, 08:30:11 am
content: It's will work if you use Car Coil and a lot of 9v batteries in parallel to get good current , but be careful really it's dangerous things..Quote from: Jbliss on April 22, 2015, 07:37:15 am

author: Jbliss
author_rank: Regular Contributor
timestamp: April 22, 2015, 02:18:35 pm
content: How about this Onehttp://www.555-timer-circuits.com/stun-gun.htmlremember i not using for shocking someone

author: klr5205
author_rank: Regular Contributor
timestamp: April 22, 2015, 02:56:16 pm
content: One of the limiting factors I think will be the breakdown voltage of the transistor which would clamp the flyback voltage. I don't think that circuit will produce 20kV but it should be capable of some sparks.If you do build it, pay attention to the high voltage capacitors required...

author: jlmoon
author_rank: Unknown
timestamp: April 22, 2015, 03:15:19 pm
content: Quote from: klr5205 on April 21, 2015, 08:19:04 pmThis activity sounds very familiar, when I was in middle school I made a very similar object (Form factor was a Kaleidoscope with two foil coatings on the outside of cardboard tube, batteries, multi-vibrator and transformer inside ) that was the talk of the student body for quite some time. The flyback circuit activator was a mercury switch strategically placed so when you held the scope up and looked through it. You got a slight bit more tingle than just the Kaleidoscopic view before your eyes. When demonstrating the thing you could hold it a certain way and all was good until the unsuspecting got a hold of it.Totally harmless very low current fun indeed. Needless to say, someone liked it more than me and it soon disappeared.