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CodeLock AVR electronic combination lock is realised with Atmel AVR microcontroller AT90S2313 or ATtiny2313. Program in hex code is 2 kB long. User code is consisted of 1 to 4 digits. If you buy the chip than user code is consisted of 1 to 8 digits. If the code is entered in the correct sequence, then after 1 second the relay and the electric striker (in the door) switch on for 1 second and then switch off again. User code can be changed via 3x4 matrix keypad. Keypad for CodeLock can be bought at local electronic shop. Initial user code (1234) is set up with a jumper. The jumper must be inserted before the voltage (12V) connection. The jumper must be removed after 2 beeps (after 5 to 15 seconds). LCD display is an option! CodeLock AVR DIY, Electronic combination lock CodeLock AVR, DIY
Signaling: Each pressed key is immediately confirmed with one short beep. Two short beeps follow after entering the right user code. One long beep appears when entering the wrong user code. The keypad is blocked for 20 seconds for each incorrect action. User code is retained even in the event of a power failure. You can use a LED diode instead of a Beeper. Look at the codelock electric circuit diagram. The third row of the keypad (numbers 7, 8 and 9) can be unpluged. In that way you get 3x3 matrix keypad. If the additional row (the second one) of the keypad is also unpluged you get 3x2 matrix keypad. In that way you can use only: 1, 2, 3, *, 0 and # keys.
That is CodeLock AVR LT version. (1 user code - 1 to 8 digits - LCD is an option) For CodeLock AVR LT project downloading click here. Program for AT90S2313 => hex1 and for ATtiny2313 => hex2. Price list: Programmed AT90S2313 or ATtiny2313 (1 user code - 1 to 8 digits - LCD is on) = 8 EUR. Programmed AT90S2313 or ATtiny2313 (8 user codes - 4 to 6 digits - LCD is off) = 12 EUR. Programmed AT90S2313 or ATtiny2313 (40 user codes - 4 to 6 digits - LCD is off) = 29 EUR.
PCB CodeLock Tiny1 that can be used also for CodeLock AVR = 6 EUR. Programmed AT90S2313 or ATtiny2313 (10 user cards - LCD is off) = 12 EUR. Programmed ATmega8 or ATmega88 (8, 16, 24 or 32 user cards - LCD is on) = 15 EUR.
PCB SmartCard4 Lock AVR that can be used also for SmartCard10 Lock AVR = 6 EUR. PCB SmartCard15 Lock AVR that can be used also for SmartCard30 Lock AVR = 6 EUR. Post (via registered mail) & Package: 4 EUR (SI), 8 EUR (EU), 16 EUR (OTHER).
 For information about 40 user codes code lock version C-Lock 3000 click here. e-mail: kripa.puri@avr.4mg.com
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