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cluros(at)gmail.com
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 Posted: Wed Jan 16, 2019 11:55 am Post subject: DIY Crowbar OVM |
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A couple years ago I ordered the parts to make an OVM for my friends aircraft. We finally got around to breadboarding it this week and we have a part left over: A 5 ohm 5 watt resistor, see picture below. Anyone want to guess what use this would be in an aircraft? Maybe I ordered it for a panel dimmer circuit or something?
Also, my 0.1uF/250V capacitor https://www.digikey.ca/products/en?keywords=p10967 does not have polarity markings that I can find. The diagram shows a polarized cap. Is this just in case? If I can't find markings on my cap am I safe disregarding polarity?
Thank you,
Sebastien
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cluros(at)gmail.com
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| Posted: Wed Jan 16, 2019 12:03 pm Post subject: DIY Crowbar OVM |
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Whoops. Picture attached.
On Wed, Jan 16, 2019 at 11:59 AM Sebastien <cluros(at)gmail.com (cluros(at)gmail.com)> wrote:
| Quote: | A couple years ago I ordered the parts to make an OVM for my friends aircraft. We finally got around to breadboarding it this week and we have a part left over: A 5 ohm 5 watt resistor, see picture below. Anyone want to guess what use this would be in an aircraft? Maybe I ordered it for a panel dimmer circuit or something?
Also, my 0.1uF/250V capacitor https://www.digikey.ca/products/en?keywords=p10967 does not have polarity markings that I can find. The diagram shows a polarized cap. Is this just in case? If I can't find markings on my cap am I safe disregarding polarity?
Thank you,
Sebastien
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bobnoffs
Joined: 04 Jul 2012
Posts: 132
Location: northern wi.
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| Posted: Wed Jan 16, 2019 1:32 pm Post subject: DIY Crowbar OVM |
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no
On Wed, Jan 16, 2019 at 2:13 PM Sebastien <cluros(at)gmail.com (cluros(at)gmail.com)> wrote:
| Quote: | Whoops. Picture attached.
On Wed, Jan 16, 2019 at 11:59 AM Sebastien <cluros(at)gmail.com (cluros(at)gmail.com)> wrote:
| Quote: | A couple years ago I ordered the parts to make an OVM for my friends aircraft. We finally got around to breadboarding it this week and we have a part left over: A 5 ohm 5 watt resistor, see picture below. Anyone want to guess what use this would be in an aircraft? Maybe I ordered it for a panel dimmer circuit or something?
Also, my 0.1uF/250V capacitor https://www.digikey.ca/products/en?keywords=p10967 does not have polarity markings that I can find. The diagram shows a polarized cap. Is this just in case? If I can't find markings on my cap am I safe disregarding polarity?
Thank you,
Sebastien
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Eric Page
Joined: 15 Feb 2017
Posts: 247
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| Posted: Wed Jan 16, 2019 6:20 pm Post subject: Re: DIY Crowbar OVM |
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Sebastien,
Your capacitor is non-polarized; its orientation doesn't matter.
Eric
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