555 Timer Based Simple Electronic Code Lock Circuit 555 Timer Based Electronic Code Lock Circuit. The 555 IC is configured as a Monostable Vibrator here. Basically in this circuit we will have an LED at the output pin 3 which turns ON when trigger is applied by pressing those specific four buttons. LED remains On for some time and then turns Off automatically. Digital code lock Electronic Circuits and Diagrams ... Digital code lock. The circuit is made around the dual flip flop IC CD4013.Two CD 4013 ICs are used here. Push button switches are used for entering the code number. One side of all the push button switches are connected to 12V DC. The remaining end of push buttons 2,3,6,8 is connected to clock input pins of the filp flops. One Transistor Electronic Code Lock System Circuit Diagram One Transistor Electronic Code Lock System Circuit Design: The circuit consists of a stepdown transformer whose input is AC supply of 230V and 50HZ. In the stepdown transformer, number of windings in the primary coil is less than the number of windings in the secondary coil. It is connected to the bridge rectifier. Simple Electronic bination Lock Circuit Schematic Circuit Notes: This could be the circuit diagram of a easy electronic combination lock by using IC LS 7220.This circuit may be applied to activate a relay for controlling (on & off) any device each time a preset combination of 4 digits are pressed.The circuit may be operated from 5V to 12V. Electronic Code Lock Circuit Engineering Projects Description and Working of Electronic Code Lock Circuit. In the circuit electronic code lock, the lock code is set through proper connection of line wires to the pads A, B, C and D as shown in the schematic diagram of electronic code lock circuit. For clear understanding, an example might be more appealing. Electronic bination Lock | Detailed Circuit Diagram ... Electronic bination Lock. This 7 digit electronic combination lock can be easily hard wired for any combination that you choose. The circuit uses a 4 bit, divide by 8 Johnson counter (IC1), ten push button switches and NPN transistor T1. Electronic Code Lock Circuit Implementation ... In this circuit we are using 6 switches. If switch S1 to S4 are pressed sequentially then lock will be opened. Switch S5 is the reset switch while switch S6 is used to disable the circuit. You can also increase the number of disable switches by connecting more switches in parallel with S6. Simple bination Lock | Digital Integrated Circuits ... SCHEMATIC DIAGRAM. ILLUSTRATION. INSTRUCTIONS. This circuit illustrates the use of XOR (Exclusive OR) gates as bit comparators. Four of these XOR gates compare the respective bits of two 4 bit binary numbers, each number “entered” into the circuit via a set of switches. Electronic Lock Circuits Digital Keypad bination Lock This simple circuit is the electronic version of the combination lock. Using the special purpose LS7220 digital lock IC , the circuit allows a 4 digit combination of your choice to activate a relay for a set period of time. Electronics Club Project Simple Electronic Lock Simple Electronic Lock Project. 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,... Key code lock switch circuit – Circuit Wiring Diagrams This key code switch circuit is a type of electronic circuit that is created to replace conventional normal key switch. Without inserts a keys. But you can press the number code instead of unlock keys. We do not have to carry a load key and do not worry about your keys are lost. We just must remember to commit to a code only. Feature of this ... Simple Key code lock switch circuit using IC 4017 ... Key Code Lock Switch Circuit Using IC 4017. This is a key code lock switch circuit, type of electronic circuit. To replace a conventional normal key switch, without inserts keys. But you can press the number code instead of unlocking keys. We do not need to carry a load key, and do not worry about your keys are lost. We just must remember to commit to a code only. Simple Code Lock Circuit electroschematics This simple code lock circuit described here is of an electronic combination lock for daily use. It responds only to the roght sequence of four digits that are keyed in remotely. If a wrong key is touched, it resets the lock. The lock code can be set by connectiong the line wires to the pads A, B, C and D in the figure.

electronic number lock circuit diagram Gallery


door block u0026 twisted door adjustments u0026quot u0026quot sc u0026quot 1 u0026quot st u0026quot u0026quot steel

door block u0026 twisted door adjustments u0026quot u0026quot sc u0026quot 1 u0026quot st u0026quot u0026quot steel

electronics projects april 2013

electronics projects april 2013

sirens generator circuit

sirens generator circuit

hitachi m12v parts list and diagram ereplacementparts com

hitachi m12v parts list and diagram ereplacementparts com

on my 1999 honda odyssey the electronic lock on the driver

on my 1999 honda odyssey the electronic lock on the driver

replacement parts

replacement parts

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