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So, I have a number of potential locations where my NFC lock might be useful. I decided to start with the easiest - my garage door. Operating a lock is easy if the door is already motorized and I just need to simulate a button press! I did a little investigating into the door opener. The useful connections I found were: Header 1 Header 2 Ground A reference ground. I didn't check whether it was isolated from the mains earth powering the door opener. It shouldn't matter. Power There is a power out ...
**   Indeffed (slang): Used to describe a user, account, or IP address that is indefinitely blocked or banned from certain or all actions.   1.0     Introduction   We all know the drill. We arrive, smile at the receptionist and in a friendly voice explain that you’re So-n-So from Company X-Y-Z and have a meeting with Mr. or Ms. You-Know-Who. The receptionist then dutifully instructs you to fill in your details in the Visitor’s Book and then o ...
Fred27

LockNFC - firmware

Posted by Fred27 May 16, 2019
Microcontroller-based hardware is just a PCB until you have some firmware running on it. Time to get it doing something. I'd already protyped both the capacitive touch keypad and the NFC reader firmware on a development board and I check that they ran together on my PCB when it came back from the fab. There was a lot of tidying up left to do.   I decide that I'd make the device battery powered. The MSP430 is designed to be low power and the locations I intended to use it weren't ideal for ...
Fred27

LockNFC - enclosure

Posted by Fred27 May 16, 2019
NFC RFID Enter Your Electronics & Design Project for a chance to win a $100 Shopping Cart! Back to The Project14 homepage Project14 Home Monthly Themes Monthly Theme Poll   It's all very well deciding that the PCB itself will be the front panel for my lock, but it will still need an enclosure. I decided that I'd tackle the simplest lock first - and that was my garage door. The reason for this is that all I have to do is simulate a button press, At worst a relay across the existin ...