CD datasheet, CD pdf, CD data sheet, datasheet, data sheet, pdf, Intersil, CMOS OR Gate. CD – Dual 4-In OR Gate. Item #CD $ $ The CD is supplied in a 14 lead outline package: Features a Thru-Hole Device. Data Sheet. Texas Instruments cd Logic Gates are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for Texas Instruments cd Logic.

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It will require to spend a lot of time to design and test the PCB. Each ‘correct’ key press will SET a flip-flop.

Thanx in advance At 25 August This circuit is significantly simpler and equally secure to the previous one. Actually one of my Ic’s Pin was broken.

CD4072 PDF Datasheet浏览和下载

At 27 December At 3 September Whenever a ‘wrong’ button is pressed, all 4 flip-flops will be RESET and the code must be entered datashwet from the beginning. But it would require more cables to draw on the circuit and this makes me sick sometimes.


You mean you cannot see it clear? Simple is nice Kammenos,rather than programming a microcontroller.

If you do, you can edit your previous posts datssheet not need to repost a new comment, if you only want to add something At 27 December At 15 January It has the same operation as the previous one, but it is not recommended to be used with a touch keypad! Anyways thanx for ur time cd0472 help At 28 December So, No, it would not work. AC electric motor working principle. Also, if the code must be entered in the correct order. I know this is not an elegant way, but i did not want to use a microcontroller for this circuit.

It could be better with just one, but i think i am used to this datasbeet.

CD4072 – Dual 4-In OR Gate

Click on it and it will maximize. May be an auto-reset feature should be added? Then you will connect the RESET of this new flip flop to the output of datasheett pin 1, that is the reset signal from an error button. To be more secure, the keypad should be on another remote PCB.

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Those should be connected to the 4 buttons that you want to have the code. At 24 January There are more simple but less secure circuits. It can have as many ‘wrong’ digits as you like, but up to 4 ‘correct’ digits.

The keys can be a push-button with one normal-open contact, datadheet to the positive VDD of the circuit.

CD Datasheet – CMOS OR GATES from Texas Instruments

Here is a video from the circuit in operation! This circuit does not have the chip. The code to open the lock would be c4d072. Nowadays, i could make a more complex systems, with security code, LCD display and hardware key, but i decided to make a more simple yet secure circuit for the other ‘kids’ that want to boot with more than just a cold pushbutton. At 3 October How to do it?