Hi everyone. Welcome to my second instructable. Today I am gonna show ya how to make a Fingerprint Scanning doorlock that can also print out who came in and if any stranger tried this too. To do this we'll be using the Adafruit thermal receipt printer, a very cute little printer and a GT-511C1 fingerprint scanner. So if you're ready let's go to step 2: Parts and Tools.
UPDATE: I had made a few mistakes in the materials and the code but I corrected them. ;)
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Step 1: Parts and Tools
For this instructable you will need the following. The things are clickable.
x1 Arduino UNO (Or any other arduino except mini and micro)
x1: Adafruit thermal printer.*
x2 Jumper Wires Premium 6" M/F Pack of 100 (Or any cheaper you find)
x1 12v door electric strike of your choice.
x1 5V 2A (2000mA) switching power supply - UL Listed *(Or any similar of your country)
x1 12V power supply of your choice
and WIRE Solid core
* These are sold in a set too which you can find here
Well I think that's about it. So let's head to part 3: Wiring.
Step 2: Wiring
Here come the schematics.
Step 3: Programming.
That's the program. Feel free to hack it away but copy the first lines.
Step 4: Preparing the Strike
To prepare the strike you need to solder it to the relay and embed the 12 v power supply.
Something like this
Step 5: Dress It Up.
Now you will need something to put the whole thing in.
For the inside module you can use a nice carton box or wooden box if you want to be fancy.
As for the outside module you can use the case from Nodah's fingerprint Scanning garage door opener.
Step 6: Troubleshooting
If the fingerprint scanner does not turn on check if you wired it correctly.
If the printer does not print the 'Finger not found' and 'Verified ID' things try connecting the RX and TX wires (yellow and green) the other way around.
If the printer didn't print some diagnostics and the fonts, when you plugged it in, this means you might have connected the power supply the wrong way (Connect it the other way around) or it's busted (Contact adafruit).
That will be all !
If you have any other problem leave me a comment and I will do my best to answer it.
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Epilog Challenge VI