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Smoke alarm printer power shutdown (3688558) |
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by web web (warham) |
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Download |
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Web page |
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https://youtu.be/YHFWKCxV6m4 |
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(This is a do at your own risk project... I didn't do |
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proper research on all the hardware. |
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For example the smoke alarm is tripling the voltage input |
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and sending like 8v into the 3v relay trigger and I am |
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not sure what the relay trigger chip range is spec'd to |
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run at) |
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A variation on the henryarnold smoke sensor power killer. |
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Hopefully, there will be smoke before the printer catches |
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on fire and this is supposed to shut down the power |
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supplies. |
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Fairly simple setup, a smoke alarm that outputs some |
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voltage to trigger a relay which interrupts the power |
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supplies on circuit. Although this works I am a bit |
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confused whats happening with the voltage output. I am |
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inputting 3.3v into the smoke alarm but it appears to be |
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stepping the voltage up to 9.x volts. |
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6.16.19 ended up installing 2 relays to add latching |
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function. |
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I tried a couple relays that claimed to be latching but |
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they way they worked was that they toggled on and off |
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with a flip flop chip. |
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It might be possible to simplify this circuit just using |
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a single- double pole relay powered directly from the |
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smoke alarm but I didn't test this, not knowing the |
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current output capability of the alarm. |
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I connected the smoke alarm to one of these IOT relays. I |
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have two of these on my printer, one on each power |
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supply. |
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https://www.amazon.com/Iot-Relay-Enclosed-High-Power- |
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Raspberry/dp/B00WV7GMA2 |
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Smoke Detector - First Alert BRK 3120B |
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https://www.amazon.com and then search for "B00O8MVW44 |
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Small relays I used inside the smoke alarm |
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https://www.amazon.com/gp/product/B07L6JXGXV/ref=ppx_yo_dt_b |
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_asin_title_o01_s01?ie=UTF8&psc=1 |
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5v to 3.3v regulator. |
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https://www.amazon.com/gp/product/B074FDLCLB/ref=ppx_yo_dt_b |
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_asin_title_o01_s01?ie=UTF8&psc=1 |
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Date Published: 2021-03-10 15:06:36 |
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Identifier: thingiverse-3688558 |
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Item Size: 55240 |
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Media Type: data |
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# Topics |
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fire kill switch |
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stl |
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thingiverse |
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smoke alarm |
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3D Printer Parts |
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# Collections |
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thingiverse |
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# Uploaded by |
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@xtream1101 |
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