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Gadget Freak Case #157: Microcontroller Lock Hardware Protects Bill's Sock Drawer
DN Staff
October 26, 2016
1 Min Read
William Grill doesn't like people messing up his sock drawer, so he added an electronic lock that requires a user-defined sequence of key codes from three pushbuttons. The correct sequence opens the lock and turns on a status light. Enter the wrong sequence and an alarm circuit socks it to you with a noisy buzzer, flashing LED, or both. The designs use a Microchip Technology PIC12F509 microcontroller. Who knows what's in store for William's tie rack?
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Gadget Freak Case 157 Microcontroller Lock Hardware Protects Bill's Sock Drawer A
Amt | Part Description | Allied Part # |
|---|---|---|
1 | IC1-Microchip PIC12F509 MCU (8-pin DIP) | |
1 | Solenoid | |
1 | 10I.25F Capacitor (50V DC) | |
1 | 2.2I.25F Capacitor (50V DC) | |
1 | L3-LED, Green | |
2 | L1, L2-LED Red | |
1 | ASLM1-Mallory Sonalert | |
2 | Q1, Q2-IRLD024 Power MOSFET, N Channel | |
1 | 820I(C) Resistor (1/8W) | |
2 | 10KI(C) Resistor (1/8W) | |
1 | 100I(C) Resistor (1/8W) | |
1 | 330I(C) Resistor (1/8W) | |
1 | L78L05ACZ Voltage Regulator | |
2 | D1, D2-1N4148 Diode | |
2* | D3, D4-11DQ05 Schottky Diode | |
3 | K1,K2,K3-Pushbutton Switch | |
1 | AZ943-1AH-5DE Relay, %V DC Coil | |
1 | 8-Pin DIP Socket | |
2 | 3-Contact Terminal Block | |
1 | Battery Holder (3 AAA) | |
3 | Battery, AAA. Alkaline | |
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