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💬 Secure 5-button Keyfob

openhardware.io 2 May 2017, 09:55 last edited by openhardware.io 27 Jun 2017, 09:27

https://www.openhardware.io/view/383/Secure-5-button-Keyfob
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mysensors 189 atsha204a 28 enclosure 5 keyfob 1
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NeverDie Hero Member 8 May 2017, 00:40 last edited by

I look forward to seeing photos....
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The choice of MOSFET can be tricky. Seems that irlz44n was discontinued so you may need to find one adapted to the voltage and current you want to handle. In all the cases you need to get a logic MOSFET too, meaning that they are fully open usually around 1 to 3V. Also I'm sort of confused as it seems to me that L7812CV is a Voltage regulator, not a MOSFET. So if you are actually using that in the MOSFET spot it will definitively not work. Especially if you are handling high current or voltage I would recommend using one from a reputable source for your MOSFET, I recently switched from mouser / digikey / aliexpress to mostly use http://www.arrow.com as you get free regular shipping, event if you order a couple of components (no affiliation to them whatsoever).
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@Zwer2k my expectations seem correct. I created a bug report that also includes a rudimentary workaround. https://github.com/mysensors/MySensors/issues/1496#issue-968399284
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Thats perfect.. definitely have to try this.. Thanks!!
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Hi, I finally received the boards from the manufacturer(big thanks to @Seeed-Fusion). I manage to assemble one board by soldering the components and such and...it WORKS(including OTA)! I will post the instructions on openhardware.io project page.
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I am non technical but I have 8 wirsbo stats in my house. One of them is faulty and the unit is now obsolete. Is it possible to purchase one of these pcbs and use it to replace the one in the faulty stat ? Thanks Richard
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I think you can just set the I2C pins in MyBoardNRF5.h without remapping the pins in MyBoardNRF5.cpp. Look in MyBoardNRF5.h, under the Wire Interfaces section. Set SDL and SCA to 30 and 31 as appropriate for your board.
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@JahFyahh - I still haven't managed to et round to it. I've been really busy since this project and its still hectic here. I'm sure i read a few reviews somewhere, here or google. Not sure.

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