- cigarette lighter plug end getting quite warm - 4 Updates
- voltage of dimmer output not reading same on two different DVM's - 2 Updates
- 3D Printer - 1 Update
| OJ Oxford <bestnet@none.com>: Nov 07 09:51PM -0500 I have a cigarette lighter plug and socket rigged up in the house for a special purpose being drive by a 5VDC, 10 amp supply. The circuit after the plug is drawing about 7.5 amps. However, upon removing the plug, I find that it's quite warm almost too hot to touch towards the tip. Nowhere else throughout the wiring is anything that warm. I am using 14 ga wire throughout and the plug also used 14 ga wires. Is this amount of heat normal for the plug or is something causing it? Thanks. |
| Mike Coon <gravity@mjcoon.plus.com>: Nov 08 10:46AM In article <ro7mfu$hki$1@dont-email.me>, bestnet@none.com says... > Nowhere else throughout the wiring is anything that warm. I am using 14 > ga wire throughout and the plug also used 14 ga wires. Is this amount > of heat normal for the plug or is something causing it? Thanks. Those are a lousy design of plug/socket, skewed because of the requirement to disconnect when the lighter reaches working temperature. And of course a bit of excess heat hardly matters in the intended purpose, either. But the contact area is really too small for high currents, probably much smaller than the cross section of your wire. If you actually use it for lighter plugs it may have got a bit dirty from the sparking, making the contact even worse... |
| major <maj7789@aolspam.net>: Nov 08 07:51AM -0500 On 11/8/20 5:46 AM, Mike Coon wrote: > currents, probably much smaller than the cross section of your wire. If > you actually use it for lighter plugs it may have got a bit dirty from > the sparking, making the contact even worse... Hmmm, I may change it out for something better then. What might be a similar low voltage, high current quick disconnect connector I could use? I may need up to 12 VDC @ 8 amps through it. |
| "Peter W." <peterwieck33@gmail.com>: Nov 08 08:12AM -0800 https://www.wish.com/product/5a71225a639a7a64e165a9fb?hide_login_modal=true&from_ad=goog_shopping&_display_country_code=US&_force_currency_code=USD&pid=googleadwords_int&c=%7BcampaignId%7D&ad_cid=5a71225a639a7a64e165a9fb&ad_cc=US&ad_lang=EN&ad_curr=USD&ad_price=1.39&campaign_id=7203534630&gclid=Cj0KCQiAy579BRCPARIsAB6QoIYUIV12EmE-V4XwIgPqvnLSwKHR6aLvMJpbDqBuFm7k6xwVRbfVkQEaAsaTEALw_wcB&share=web This is the same battery connector for R/C cars, boats and planes. Capable of up to 25A at 7.5 volts. Should do the trick. Peter Wieck Melrose Park, PA |
| brucek <brucek@valinet.com>: Nov 07 07:36PM -0500 major <maj7789@aolspam.net> Wrote in message:r > I am using a 12 V 20 amp lamp dimmer to control some LED lighting. While my two DVM's show nearly equal input voltage to the dimmer, they both read separate voltages on the output side. One is reading 9 V and the other 4 V. I am trying to determine wattage output at various dimmer settings. Why the different in voltage readings on two different DVM's and how to remedy? i'd guess because they are non-sinusoidal outputs and one of the meters is not true rms -- ----Android NewsGroup Reader---- https://piaohong.s3-us-west-2.amazonaws.com/usenet/index.html |
| Andy Burns <usenet@andyburns.uk>: Nov 08 08:46AM brucek wrote: > i'd guess because they are non-sinusoidal outputs and one of the meters is not true rms I'd say neither of them are true RMS. |
| Three Jeeps <jjhudak4@gmail.com>: Nov 07 03:59PM -0800 > Peter, there are several discussions about 3D printing on the Tekscopes forum. Tektronix knobs have a lot more detail than radios used, but people are happy with the results. They have recommended the proper plastics, printers and software. Be advised, to anyone who wants to join, not just read. You will be kicked to the curb if you are an asshole. If you do get set up, you can post files so others can make the same part without starting from scratch. It can either be public, or private but if others add their files it would save a lot of time and headaches. You could even set it up at a show and demonstrate how it works. > Here is a link to read the group. You can find a link to join, if you are interested in Tektronix equipment. > https://groups.io/g/TekScopes/topics This is a great group. No nonsense, professional, civil, stays on topic. As pointed out, assholes are not tolerated. J |
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