Relay oscillator  - Page 1
Forum section: electronics / beginners

author: Jbliss
author_rank: Regular Contributor
timestamp: April 28, 2015, 01:21:39 am
content: Hi guyscan some please draw me up a oscillator circuit for this relay (Frs1 6v Relay) for some reason just can't get it to workheres the spec sheethttp://conrad.ru/doci/mini_rele_s_odnim_pereklyuchaemym_kontaktom__maks__1_a_30_v_dc_125_v___ac_1_v_dc_125_a_30_v___ac_505188_en.pdfand pin outhttp://www.electro-tech-online.com/attachments/relay_comp-gif.3191/Thank you

author: jeroen79
author_rank: Frequent Contributor
timestamp: April 28, 2015, 01:31:17 am
content: Does the relay work at all?What have you done so far?

author: Jbliss
author_rank: Regular Contributor
timestamp: April 28, 2015, 02:23:24 am
content: yes the relay works i have tested it i just need a circuit design for it

author: Jbliss
author_rank: Regular Contributor
timestamp: April 28, 2015, 05:13:52 am
content: anybody pls

author: Whales
author_rank: Super Contributor
timestamp: April 28, 2015, 06:08:52 am
content: What have you tried and did not work? Can you attach a drawing of your circuit?

author: jancumps
author_rank: Unknown
timestamp: April 28, 2015, 06:56:30 am
content: Blast from the past

author: Jbliss
author_rank: Regular Contributor
timestamp: April 28, 2015, 07:23:23 am
content: Quote from: blueskull on April 28, 2015, 05:57:00 amHi what will be the output pin

author: Zero999
author_rank: Super Contributor
timestamp: April 28, 2015, 07:32:56 am
content: Whether it's lethal or not depends on the size of the relay. A small 12V 500R relay won't be able to deliver a lethal shock but a large contactor might.If you parallel with coil with a normally closed contact you'll need a resistor to limit the current.The output is taken from the coil.

author: matseng
author_rank: Frequent Contributor
timestamp: April 28, 2015, 07:34:18 am
content: Quote from: blueskull on April 28, 2015, 05:57:00 amAre you sure? A quick google only brings up sites saying that a contraption like this is non-lethal. Of course you *could* possible make it lethal by adding a diode and a big-ass cap to charge up a decent amount of joules at a few hundred volts - but that is another thing.

author: SL4P
author_rank: Super Contributor
timestamp: April 28, 2015, 07:35:13 am
content: Quote from: Jbliss on April 28, 2015, 07:23:23 amThe last one you accidentally touch.Seriously - if you are asking how-to, then you are missing a few other important questions that come first.https://en.wikipedia.org/wiki/Vibrator_(electronic)

author: Jbliss
author_rank: Regular Contributor
timestamp: April 28, 2015, 08:29:03 am
content: i wouldn't say lethal maybe a nasty shock but you would need a couple of diodes and some big caps the oscillating relay by its self won't do anything other than ...... osilate

author: Psi
author_rank: Super Contributor
timestamp: April 28, 2015, 09:25:50 am
content: Quote from: Jbliss on April 28, 2015, 08:29:03 amA relay is more than capable of giving you a shock, no caps or diodes needed.A large relay with electrodes pushed into your skin could approach theoretical lethal levels.

author: Simon
author_rank: Unknown
timestamp: April 28, 2015, 11:53:01 am
content: Quote from: matseng on April 28, 2015, 07:34:18 amif the back emf is powerful enough it could be harmful and I'd imagine it's not easy to predict. I've seen 400V shocks off a 24V fan when power is removed although that is of course much more powerful than a relay. A back emf diode may make it say.

author: smjcuk
author_rank: Frequent Contributor
timestamp: April 28, 2015, 11:57:48 am
content: I used to do that as a kid. Then connect the relay coil across a 6v/240v transformer secondary so it stepped up the voltage. Can get some impressive sparks out of that (until the relay contacts melt).Please don't do it however - it's stupid and irresponsible.