we search ne555 ic code lock system

EXCELLENT!!!!

With the help of a precise variable voltage supply, the upper and lower voltage levels were set. The normally connected (NC) lead of the relay isn't joined to the 15-V dc supply, which blocks this voltage from passing to the battery leads. This will accurately set the upper and lower levels. But the charging supply of 15 V dc was connected to the circuit.

First, the variable supply is fixed at 13.3 V dc—the voltage of a fully charged battery—and linked to the battery point of the circuit. The slider of VR1 is turned to the extreme end on the side that's attached to the positive terminal of the battery. VR2's slider should be turned toward the end that's connected to VR1. The transistor turns on, shunting VR1. Then the slider of VR1 is turned toward the other extreme, which is the end connected to VR2.

The test supply voltage is now set to 11.8 V dc, which is the voltage of a drained battery. VR2 is then adjusted so that it just turns off the transistor again. The test voltage is raised to 13.3 V dc again, and VR1 is adjusted so that the transistor turns on. With the upper and lower levels set, the NC point is connected to the circuit (15-V dc charging voltage). Now the battery charger is set and ready to go.

Your all idiots if you can't see how this circuit could be replaced by switches and wire. As one of my professors once said "If this is too hard here are the change of major slips on my desk."

ZERO TRANSISTOR SOLUTION is not fool proof, if someone depresses all the bottons the circuit will be activated.

nice concept.....i hv same projest on the basisof 555 timer will ths work? nd iwant toget good exp. of relay its urgent...plzzzzzzzzzz

relay and the solenoidal circuits can be better explained

relay and the solenoidal circuits can be better explained

can y[u mail me that circuit please.

hi thi is a beast way for progres

I want to have new circuits from your sites wihich is very useful for me. My hobby belongs to Electronics field.

Thank you

Please e-mail me the explanation and the whole process of the system today or as soon as possible; IT IS VERY VERY URGENT.

Thanking you, Arijit Bhattacharjee

I need a password lock

nice! NOT!!! YOU'RE all goons

u are all goons the end

u are all goons the end

u are all goons the end

u are all goons the end

u are all goons the end

u are all goons the end

u are all goons the end

u are all goons the end

plase explain all component in the circuit Electronic combination lock circuit .

plase tody or now.

http://www.free-electronic-circuits.com/circuits/electronic-combination-lock.html

plase solution now

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I liked the circuit. it is very useful. can anyone help me in designing a solenoid system. if yes please contact me on this email: sabrinaalbarwani@gmail.com

can i see the example of the circuit.send by email a.s.a.p

it's' beuty

Dabba

welcome to you M: bekhouche ayache_address: ptt sefiane 05610 algerie _please send me some information about you thank s.

send to me som simple prjets tof biginer

this is very useful to electronic engineering

How about a zero-Transistor Solution? This lock could have been designed with the same degree of security using only the ten switches and some wire. I could wire the ten switches some NO the rest NC. Don't these articles ever get reviewed before publication?

A good method for low-cost locks, but it will make the circuit less complex hence vulnerable to be picked.

Ingeniously simple -- he should have patented it !!!