The simplest Electronic Door Lock


Posted on Apr 30, 2012

To put the relay in tension the 4 buttons S1 S4 must be pressed. If anyone of the 4 butoons S5 S8 are pushed the relay donts tension ( dont receives supply voltage ). The supply voltage must be equal to the working voltage of the relay. One transistor like BD135 can commute up to 0.5A, in the same tine 2N2222 can do only 0.2A.



The simplest Electronic Door Lock - image 1
Click here to download the full size of the above Image.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Audio Mixer with 2N3819
Rs-232C Line-Driven Cmos Circuits
Solar Charge Controller connection with solar panel
How to Make a Simple Reverse Forward LED Light Chaser Circuit Using IC 4017
circuit 10a variable power supply symmetric
NJM2274AR LOW POWER VIDEO AMPLIFIER WITH Y-C MIXER
Night Light Saver
SCA broadcast receiver circuit diagram



Top