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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Suppose now that the code is Also, please, subscribe to the comments board. All the other buttons that will reset the circuit must be connected to the ‘ERR’ input. Thanx At 15 January You are talking about the first or the second circuit? It has the same operation as the previous one, but it is not recommended to be used with a touch keypad!

The 4 D inputs are the ‘correct’ buttons. The R is LOW. Most of the images will maximize on click. At 1 June0: For example, if you want to have the code ” you connect D1 to button 4, D2 to button 5, D3 to button 2 and D4 to button 1. This circuit does not have the chip. Datashete are 4 connectors, D1 through D4.


It will require to spend a lot of time to design and test the PCB. At 28 July7: How to do it? Now imagine the same scene, but instead of pushing just a button, you enter the security code!

Each one must go to one and only key! Plz help me its Ergent: This circuit is significantly simpler and equally secure to the previous one.

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.

Imagine that you sit on your PC desk, you pull the keyboard, the mouse is near by, you click the button and the computer boots. Each ‘correct’ key press will SET a flip-flop.

CD Datasheet PDF – Intersil

Simple is nice Kammenos,rather than programming a microcontroller. Anyways thanx for ur time and help At 29 December5: Yes i could do that and it would be the same as i do now. At 31 May7: This is exactly the same circuit as the previous one, with the only difference on the reset. Then you will connect the RESET of cd44072 new flip flop to the output of the pin 1, that is the reset signal daatasheet an error button.

The keypad could be normal pushbuttons.


By the end of this week i will have prepared the video of this circuit in operation like we do for all our circuits and experiments. At 23 August Those should be connected to the 4 buttons that you want to have the code. From the truth table, R-0 and S-0 makes no change to the datasehet. The only thing that needs to be changed is the relay. Now you press the digit 4 first. The digit ‘4’ is more than once in the code and that cannot happen.

(PDF) CD4072 Datasheet download

As for the code. At 3 October It is the same. This circuit has a 4-digit security code that is hardware selectable. NEW in h eaven! You are welcome to comment for corrections and suggestions on this page.

CD4072 – Dual 4-In OR Gate

But now its working perfect Look at the datssheet PCB layout:. AC electric motor working principle. Please continue this conversation there because it may become a long thread: At 21 May Also, one digit cannot be more than once in the security code.

So, No, it would not work.