74HC121 PDF

The MC74HCA is identical in pinout to the MCB. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are. 74HC Datasheet, 74HC PDF. Datasheet search engine for Electronic Components and Semiconductors. 74HC data sheet, alldatasheet, free. 4 Sep nS catch circuit using a basic 74HC/74HC monstable is very straight forward to give an input to the PIC. Can post an LTSpice sim.

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Mikebits Well-Known Member Sep 6, Feb 6, 9. Try a high-speed opamp. Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets.

Hi, i want to detect a pulse with ns and 50mV amplitude. The LM is too slow for amplifying a nS pulse. Do you already have an account? Nov 23, 8, 6, For a better experience, please enable JavaScript in your browser before proceeding. You must log in or register to reply here. Have a flag a bit that controls this timer from the code outside the interrupt.

When the flag is clear timer stoppedset the register to your timing value. Forums New 74uc121 Search forums. Feb 24, 11, 2, Invest the time to learn how to fix this in software, you will not regret it. Feb 6, 1. Can post an LTSpice sim when I get around 74hx121 it.

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alternative to CD multivibrator | All About Circuits

Maybe this is the problem: Maybe 74hf121 the title of the thread – detect pulse of ns and 50mv. Then, in the interrupt routine have a variable which is your virtual “timer” – you can have as many of these as you like as you like.

Makes calculating the timing easier. Feb 6, 7. To participate you need to register.

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Alternative to BF Posted by toughspeaker in forum: When the flag is set timer running decrement the register every interrupt. There are many ways you can implement delays without going into a dedicated delay loop. Turning on a Light with Ultrasonic Motion Detection This project will show you how to connect an ultrasonic sensor and an Arduino to turn on a light when motion is sensed. Jan 6, 3, 1, Check Out Cornell’s Wireless Biometric Pen Drive Prototype Two engineers from Cornell have combined the functionalities of a wireless pen drive with a biometric data security system, can they make it commercially viable?

Mosfet drain current spike and input current spike in full bridge inverter. I guess jumper wires are my only real option then. By continuing to use this site, you are consenting to our use of cookies. Feb 6, 6.


74hc21 On the analogue side, a simple high speed op-amp comparator will do. Alternative to Xbee Posted by bencbrown91 in forum: Articles Top Articles Search resources.

or Timer as a One-Shot

74hf121 How did you determine your pulse width is ns? OpAmp circuit for temp sensing using diodes Started by Elerion Today at 1: Is there a chip like the CD but where the clear input and “B” input are internally tied high instead of offered as pins? You bias the reference minus some from the incoming signal.

Does this mean that quantum computers are closer than we realize? I don’t know how long a pulse needs to be to guarantee it triggers an interrupt? The perfect approach for me is two monostable multivibrators, because one will be used for the pin and another to refresh the clock on an external flip-flop connected to the micro for other purposes. Mikebits Well-Known Member Sep 5, Apr 11, 3, 1, How to create dashed plot in Octave? Jun 19, 1, Should i buy another one?