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AN728: Remote Keyless Entry & Convenience Center Reference Design with LIN Bus
Interface - Microchip Application Note Published 26-Sep-02 (app note
added 2/06) |
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Automatic Door Opener with PIC12c508 - This circuit can be used to operate an
electric strike or an electromagnetic lock on a door. It is not the door being
opened/closed, but a small electromagnetic strike which unlocks the door. The
opener has the following features currently programmed in software... (schematic
added 6/07) |
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Code Lock with ATMEL AVR - CodeLock AVR electronic combination lock is
realized 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). ….(circuit design added 11/08) |
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Combination Digital Lock - A multiple input combination loack using CMOS
counter IC's. Flexibility and code change is allowed by changing output
connections. (schematic / circuit design added 9/02) |
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Combination lock - Operate your gate or something different by this simple
electronic combination lock. The combination can have a chosen length of numbers
or alphabets, and can be changed any time. The LCD display is optional, the
circuit works fine without it. After entering the correct combination, a relay is
operated for the predefined time.....(design added 05/09) |
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Combination Lock (nutchip) - Combination lock are nice to enable alarms, but
are useful for controlling a wide range of electric devices. These software keys
can open gates, garages, TV sets, telephones, VCRs, well pumps... In practice this
circuit is capable to lock or time all the devices that can be connected to
relays. (electronic design added 6/07) |
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Combination Lock (PIC16F84) - (circuit added 06/07/08) |
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Combination Lock for Car Liftgate - (circuit / schematic design added 6/06) |
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Combination Lock PIC16F84 - (electronic diagram added 6/03) |
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Combination Lock-Digital - (electronic design added 6/07) |
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Digital Combination Lock - (schematic / circuit design added 9/02) |
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Digital Electronic Lock (Bill Bowden) - The digital lock shown below uses 4
common logic ICs to allow controlling a relay by entering a 4 digit number on a
keypad. The first 4 outputs from the CD4017 decade counter (pins 3,2,4,7) are
gated...(added 05/07) |
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Digital Electronic Lock circuitdb - The digital lock shown below uses 4 common
logic ICs to allow controlling a relay by entering a 4 digit number on a keypad.
The first 4 outputs from the CD4017 decade counter (pins 3,2,4,7) are
gated...(added 03/07) |
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Digital Lock - A Simple But Very Effective Circuit....(electronic schematic
added 12/08) |
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Door lock cancellation switch - This is the circuit where can open the door of
the car even if there be not a key. The switch that cancels door lock is set
up to the car.….(added 04/05/06) |
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Electronic Card Lock System - (electronic Circuit / Schematic added 10/04) |
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Electronic Combination Lock (Randy Linscott) - This circuit is very basic to
build. To open a the lock which is connected to the K1 Load you must press each
momentary switch in the correct sequence. The sequence used in this circuit is
S1,S2,S3,S4. If any of the other switches are pressed….(added 08/08/08) |
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Electronic Combination Lock AVR - (circuit / schematic design added 6/06) |
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Electronic Combination Lock with AVR - (electronic schematic / circuit added
2/05) |
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Electronic door codelock PIC16F84 - (circuit design added 04/05/06) |
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Electronic Lock - This is my electronic combination lock to use with an
outdoor gate. The functionality is implemented in software. It turns on a relay
(usually to open a door) for a few seconds…. Uses a PIC16F84A (circuit added
08/07/06) |
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Electronic Lock (Bill Bowden) - The digital lock shown below uses 4 common
logic ICs to allow controlling a relay by entering a 4 digit number on a keypad.
The first 4 outputs from the CD4017 decade counter (pins 3,2,4,7) are
gated...(added 05/07) |
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Electronic Lock circuitdb - The digital lock shown below uses 4 common logic
ICs to allow controlling a relay by entering a 4 digit number on a keypad. The
first 4 outputs from the CD4017 decade counter (pins 3,2,4,7) are gated...(added
03/07) |
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Electronic Locker - This circuit is an Electronic Locker. It is controlled by
a switches combination (by a code). There is a switch matrix on the door of the
locker. This one is a unit of switches connected into 4 arranged of 4 columns for
a total of eight terminals.....(circuit design added 09/08) |
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Electronic Safety Lock Based on Attiny26 - This safety-lock can be work with
up to 8 different telecards (empty or not) as access keys. Each telecard can be
registered or unregistered from the system, by press the corresponding
button.…(electronic circuit added 4/05) |
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Enhanced Alarm Keypad - (schematic / circuit design added 9/02) |
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iButton electronic lock Circuit - This electronic lock can be used with any
type of iButtons you may already have, since the only thing needed is the internal
serial number, that's different for every iButton…..(circuit diagram added 09/08) |
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Infrared gate 2 (Peter Jakab) - This is an infrared gate with two sensors
planned to use in the wall in the way behind a door. It can be applied in a toilet
to keep track of that someone is inside exceeding a certain amount of time. After
that time elapsed, the circuit triggers the digital output wich can turn on a
ventillator. The time period ....(electronic circuit added 7/03) |
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Low Cost Digital Code Lock - (electronic Circuit / Schematic added 10/04) |
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Programmable Digital Code Lock - (electronic circuit added 10/05) |
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Remote Door Lock (Seiichi Inoue) - …(circuit design added 05/08) |
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Remote Keyless Entry & Convenience Center Reference Design with LIN Bus InterfaceMicrochip
Application Note Published 26-Sep-02 (app note added 2/06) |
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Safety-Lock with Telecard as Key - This safety-lock can be work with up to 8
different telecards (empty or not) as access keys. Each telecard can be
registered or unregistered from the system, by press the corresponding
button.….(circuit design added 05/09) |
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Simple Code Lock - (electronic Circuit / Schematic added 10/04) |
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Simple combination lock - This experiment may be built using only one
8-position DIP switch, but the concept is easier to understand if two switch
assemblies are used. The idea is, one switch acts to hold the correct….(electronic
design added 6/07) |
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Simple Electronic 'Lock' - There are six (or more) push switches. To 'unlock'
you must press all the correct ones at the same time, but not press any of the
cancel switches. Pressing just one cancel switch will prevent the circuit
unlocking. When the circuit unlocks it actually just turns on an LED for about one
second, but it is intended to be adapted to turn on a relay which could be used to
switch on another circuit.....Designed by John Hewes (circuit added 06/07/08) |
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Simple Low Cost Digital Code Lock - (electronic Circuit / Schematic added
10/04) |
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Single Button Lock Provides High Security - 03/04/99 EDN-Design Ideas: Figure
1 is the block diagram of an easily programmed, single-button combination lock.
You operate the lock by using a series of short and long pulses from a momentary
switch that masquerades as a doorbell button. The circuit uses inexpensive CMOS
logic. The retriggerable timer,.....(design idea added 5/03) |
