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Security Circuits - including Burglar Alarms,  Page 2
Security Burglar Alarms:  #'s - D      E - L      M - S      T - Z
Last Updated on: Friday, July 18, 2008 11:33 AM
 
Circuits Designed by Dave Johnson, P.E. :

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

Electronic Card Lock System:  (electronic Circuit / Schematic added 10/04)

Electronic Combination Lock #2:  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 the circuit will reset and you will need to start over. Depending on how you wire the switches, you can use any 4 switch combination. (added 09/05)

Electronic combination lock with AVR:  (electronic design / schematic added 2/05)

Electronic Door Codelock:  (schematic / circuit added 10/02)

Electronic Door Codelock with PIC16F84:  (circuit / schematic design added 6/06)

Electronic Safety lock Based on ATtiny26:  (electronic circuit added 4/05)

Enhanced Alarm Keypad:  (electronic design added 9/02)

Frame Grabber:  Intersil Application Block Diagram  (app note added 6/06)

Gate Alarm Circuit:  (circuit design added 8/03)

Home Security Project:  (circuit design added 8/03)

Infrared gate for Door:  (circuit design added 8/03)

Intruder Radio Alert System:  (electronic Circuit / Schematic added 10/04)

IR 'slotted Switch' Sensor:  ASCII format (added 10/04)

Luggage Security System:  (electronic Circuit / Schematic added 10/04)

Security Burglar Alarms:  #'s - D      E - L      M - S      T - Z

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