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aus.electronics restored. In aus.cars Xeno <xenolith@optusnet.com.au> wrote: > On 8/3/2024 6:53 am, Clare Snyder wrote: >>> The point being made is that for the device to stop rust it would have >>> to be powered 24/365. The car automatically turning off the anti rust >>> device means that the car isn't protected when parked up for any length >>> of time. Possible while parked up rust has better chance of taking hold >>> - no engine/exhaust heat to dry out damp and no motion vibration or fast >>> airflow to throw off standing (small) pools of water. > >> They only draw less than 1 Ma of current. Some claim as little as >> 1/3 of a ma (most of that from the tiny LED that indicates it is on, I > > That was my understanding, very little current draw. > >> would imagine) There does not need to be any current draw to provide a >> difference of potential between 2 components, and it is that potential > > Good point. As a capacitor, I expect the car body is very 'leaky', so keeping it charged would require a constant current to offset losses. This may be why the pulsed signals are preferred by at least the better documented designs. The first concern by the Canadian regulators seems to have been whether there was a capacitance effect at all or simply a dead short, hence a lot of test documention is about showing that the charge can be measured all over the surface of the vehicle's paint. >> difference (basically voltage) that is supposed to prevent corrosion > > I was under the impression some of them mentioned a *frequency* of some > sort but, as I have said previously, I have seen nothing in the way of > detailed documentation on how they operate. I already posted links to papers which describe how at least one device uses short pulses to charge then discharge the capacitance. There's more detail in the patent for an earlier device from that manufacturer: https://patents.google.com/patent/US5407549A/ It uses inductors in order to most efficiently generate current-limited electrical pulses. For my static experiment I'll be lazy and just limit the current with resistors in my DIY equivalent circuit, since for that I can use mains power. -- __ __ #_ < |\| |< _#
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Re: DIY Electronic Vehicle Rust Prevention Noddy <me@home.com> - 2024-02-25 20:22 +1100
Re: DIY Electronic Vehicle Rust Prevention Xeno <xenolith@optusnet.com.au> - 2024-02-25 20:58 +1100
Re: DIY Electronic Vehicle Rust Prevention Daryl <dwalford@westpine.com.au> - 2024-02-25 22:14 +1100
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Re: DIY Electronic Vehicle Rust Prevention not@telling.you.invalid (Computer Nerd Kev) - 2024-02-26 07:54 +1000
Re: DIY Electronic Vehicle Rust Prevention Xeno <xenolith@optusnet.com.au> - 2024-02-26 11:53 +1100
Re: DIY Electronic Vehicle Rust Prevention Daryl <dwalford@westpine.com.au> - 2024-02-26 12:38 +1100
Re: DIY Electronic Vehicle Rust Prevention Noddy <me@home.com> - 2024-02-26 12:52 +1100
Re: DIY Electronic Vehicle Rust Prevention Daryl <dwalford@westpine.com.au> - 2024-02-26 13:53 +1100
Re: DIY Electronic Vehicle Rust Prevention Noddy <me@home.com> - 2024-02-26 19:52 +1100
Re: DIY Electronic Vehicle Rust Prevention Xeno <xenolith@optusnet.com.au> - 2024-02-26 14:29 +1100
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Re: DIY Electronic Vehicle Rust Prevention not@telling.you.invalid (Computer Nerd Kev) - 2024-02-27 07:38 +1000
Re: DIY Electronic Vehicle Rust Prevention Xeno <xenolith@optusnet.com.au> - 2024-02-27 13:32 +1100
Re: DIY Electronic Vehicle Rust Prevention OldIron <Hans.Andnees@gmail.com> - 2024-02-27 06:51 +1000
Re: DIY Electronic Vehicle Rust Prevention Xeno <xenolith@optusnet.com.au> - 2024-02-27 13:27 +1100
Re: DIY Electronic Vehicle Rust Prevention Computer Nerd Kev <not@telling.you.invalid> - 2024-02-26 14:17 +1000
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Re: DIY Electronic Vehicle Rust Prevention Noddy <me@home.com> - 2024-02-26 20:20 +1100
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Re: DIY Electronic Vehicle Rust Prevention not@telling.you.invalid (Computer Nerd Kev) - 2024-02-27 07:50 +1000
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Re: DIY Electronic Vehicle Rust Prevention Xeno <xenolith@optusnet.com.au> - 2024-02-27 21:28 +1100
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Re: DIY Electronic Vehicle Rust Prevention Computer Nerd Kev <not@telling.you.invalid> - 2024-02-26 19:49 +1000
Re: DIY Electronic Vehicle Rust Prevention Noddy <me@home.com> - 2024-02-26 23:29 +1100
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Re: DIY Electronic Vehicle Rust Prevention Bud Frede <frede@mouse-potato.com> - 2024-02-26 05:26 -0500
Re: DIY Electronic Vehicle Rust Prevention Xeno <xenolith@optusnet.com.au> - 2024-02-26 21:51 +1100
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Re: DIY Electronic Vehicle Rust Prevention not@telling.you.invalid (Computer Nerd Kev) - 2024-02-27 08:05 +1000
Re: DIY Electronic Vehicle Rust Prevention alan_m <junk@admac.myzen.co.uk> - 2024-02-27 08:27 +0000
Re: DIY Electronic Vehicle Rust Prevention jon@home.org - 2024-02-27 08:38 +0000
Re: DIY Electronic Vehicle Rust Prevention Xeno <xenolith@optusnet.com.au> - 2024-02-27 21:35 +1100
Re: DIY Electronic Vehicle Rust Prevention jon@home.org - 2024-02-27 13:13 +0000
Re: DIY Electronic Vehicle Rust Prevention Frank <"frank "@frank.net> - 2024-02-27 19:46 -0500
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Re: DIY Electronic Vehicle Rust Prevention Frank <"frank "@frank.net> - 2024-02-27 19:44 -0500
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Re: Lonely Obnoxious Cantankerous Auto-contradicting Senile Ozzie Troll Alert! Peeler <trolltrap@valid.invalid> - 2024-02-27 10:59 +0100
Re: DIY Electronic Vehicle Rust Prevention Daryl <dwalford@westpine.com.au> - 2024-02-27 20:26 +1100
Re: DIY Electronic Vehicle Rust Prevention Paul <nospam@needed.invalid> - 2024-02-27 12:02 -0500
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Re: DIY Electronic Vehicle Rust Prevention Noddy <me@home.com> - 2024-02-28 11:24 +1100
Re: DIY Electronic Vehicle Rust Prevention Xeno <xenolith@optusnet.com.au> - 2024-02-29 18:33 +1100
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Re: DIY Electronic Vehicle Rust Prevention Clocky <notgonna@happen.com> - 2024-02-26 06:00 +0800
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Re: DIY Electronic Vehicle Rust Prevention Computer Nerd Kev <not@telling.you.invalid> - 2024-02-27 11:45 +1000
Re: DIY Electronic Vehicle Rust Prevention "Rod Speed" <rod.speed.aaa@gmail.com> - 2024-02-27 19:23 +1100
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