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slackjack

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Posts posted by slackjack

1. Electronics lit.

IEEE Potentials. I've only read a few IEEE Pot. in school. Its really good though.

http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=45

2. simulation softwares

What do the virtual diodes and other virtual components in MULTISIM mean? Does it imply that they are non-ideal and hence practical?

Virtual components allow you to set their parameters to any value you like — even if you could not actually find a part with those values in real life. Great for illustrating theoretical concepts.
3. Free sample chips!

Thanks for the input gogo.

4. High Quality electronic sites

Not exactly a full electronics site. But I started this site to provide links for students to aid them in studying. Topics include math (algebra - differential equations), physics and some electric circuits tutorials.

5. Ohmfree.com - Electronics Resources

Great looking site. The best part is that its not tool cluttered with unnecessary stuff. And I also love the wallpaper  :)

Good job  8)

6. Flip Flops with Multisim

I think I figured it out. I will have to use a 555 timer to generate the clock pluse. I will also need a POT to adjust the resistance and that would change the frequency of the pluse.

7. Flip Flops with Multisim

Hey guys,

I'm trying to design a counter using FF in multisim. I know that I clock signal must come along to for any change to occur in the circuit (I'm forgetting about CLEAR and PRESET for now). What should I use as the souce of the clock in multisim? And another question, what exactly is the source of a clock signal (in a real circuit)? If I open an close a switch, does that create a clock pluse (square wave) that an operate the FF?

--thank you. 8)

8. learn electronic

Try using this site

http://www.kpsec.freeuk.com/index.htm

9. Help with IR motion sensor

Thanks for the link Shahriar. It seems they have integrated the emitter and receiver circuits.

D2 picks-up the infra-red beam generated by D1 and reflected by the surface placed in front of it.

All what this circuit does is detect an object as it moves toward it, in this case the car right? If thats so, then this circuit would do just fine for experimental purposes. A vehicle is relatively wide though. Would it detect a person just as good as the car?
10. Help with IR motion sensor

So without the latch, the output would not remain high when its activated right? What kind of latch do you recommend. Probably a NOR latch?

11. Help with IR motion sensor

Hi jack,

What would be the point of integrating the two circuits? What would you use it for then?

I was just asking if its possible. Mayb it would just be easier to build one circuit instead of two...or did I miss something.
12. Help with IR motion sensor

I'm trying to buld this

Left = transmitter

This circuit has a transmitter and a receiver. So from what I understand, the interruption in a modulated pulsating beam that is transmitted by an infrared diode and received by an infrared transistor sets off the alarm. So what I am looking at is two different circuits. Can't these two be integrated into one circuit?
So I absolutely must have the circuit with the Photodiode right? If they cant be integrated, how must the receiver be placed with respect to the transmitter?

What are some uses of a Phototransistor?

--thank you 8)

13. Free sample chips!

Anyone know where to get the following parts, its for a motion sensor.

Here is the schematic.

14. motion sensor help

Hi  audioguru,

Using your suggestion of Motion  Sensor Theory. I found this, it has some intro to some theories and a schematic.

--thanks again 8)

15. motion sensor help

Hello,

I need help with building a motion sensor. Nothing fancy, just something simple that I can learn from. If anyone can tell me the parts that I need and how to build it, I would appreciate it. Or you could just point me in the direction of the nearest tutorial, that would be cool.

--thank you. 8)

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