Muhammad Abu Bakar

Hello! Does some one know why the supply pins in digital IC's are at corner while most OP-amps have them isomewhere in middle of the chip. Is it only due to mechanical construction? Regards!

Hello CPW! My words: Its tooooooo complicated ;D CPW have you considered this idea! If you can go with RF then use the directional antennas in trilateral configuration. The antennas should receive signal from the car and each should try to track it. Hence from the angle positions of the three you can find the distance/position.

Hello gevv! Thanks a lot for the stuff you are presenting here! You are doing a gret job. Keep it up!!! :D :D ;D Regards

Hi Ante! I did it with a bipolar one but the motor spined as easily as before.

Hello Smuralisankar ! Just wait a few moments. Luckily this site has got a large number of “thieve”.

Salam Fasih How are you! It seems you have 1to4 mx. I don't know what is your exact need as you havn't told one. Where you are using it. However a 2 bit binary counter connected to select inputs should work. counter have to have a pulse from 555. Flip flops can also be configured as counters. Also I told you about CD4017 which has built in counter+mux. Regards

Aslam O Alaikum Fasieh For avery simple demo you can use cd4017 decade counter IC with 555. Also google, you will find many.

Hello! In PLC the power a high pass filter blocks the high voltage at 50/60 Hz. Normaly 60KHz to 250KHz is the band used for comm. Either AM or FM modulation is used to shift the spectrum. Also have a look on LM565 and LM567 IC datasheets.

Hello AU! Yes, the replacement isn't electret one. But I wanted to experiment for better sensetivity. Then I want to build this amplifier. Can't ther be some compromise on the voltage requiered? Any suggestions, please!

The thing I am considering cond. mike, I think, also has polarity. red & black wires soldered. Which kind of mik bears highest sensitivity? Thanks for Ans!

Hello Dear All! I want to know diff b/w an electrate & cond mike. As I replaced elctrate mike in an FM Transmitter Kit with cond, it didn't work. Electrate mike was fulfilling the job successfully earlier. Also which one is more sensetive (If they are diff things)?

Hello Cyril B! Here is the link which shows how to hack mouse sensors. I hope it will be usefullhttp://www.boondog.com/tutorials/mouse/mouseHack.htm#Parts

Soes impractical means immpossible? One more question. In an LC tank often a transfo is used as inductor(antenna on other side). Does this transfo has some rigid inductance or it depends upon the load impedence?

Why not people use bridge circuit to drive the o/p transformer, so that a centre tapped transformer can be avoided. I am interested in technical reasoning.

Then what about class-C amplifier? Why it isn't used at power frequencies. After all it has good efficiency!

Hi Logon! Good to hear about Staigen's good health. Logan do you enjoy dollar free flights then? ??? :D :D

Aslam O Alaikum Shaiq Bashir! If you see symmetry, R3 should equate R8 and R7 to R4. However let's wait for audio guru to appear. :)

Hello Nissangaw ! I don't have to say much, except 50 X 50 = 2500 LED's, not just 250! ;)

Yes, you got it right. Acutually I was just about to tell you. :)

Hello AU, Luckily I had oppertutinity to play with 1KVA trafo at my college. I can remeber the load test where we dropped upto near 50% voltage.

Logan I remeber another place where u could c who is doing what at forum? where's that? I think u must know it :)

Thank You Logan! I will change the way I used to locate the things. I just copied the link at a safe place and at another time when tried to find it then.... Now I have the due respect for the "SEARCH" button.

Oh! :o ;D I had a look this page a long time ago and always wondered where I could refind it. Thanks

Hello nutty boy! Here goes an experiment to measure max output current. 1. Measure o/p voltage or trafo as V1. 2. Put a high wattage low value variable resistance (better use Rheostat) with max resistance. 3. Decrease load resistence untill you get half of V1 (i.e. V1/2) 4. Take rheostat/load out from circuit and measure its resistance, R1 5. V1/R1 is the max current u can have from this trafo. O.K.

I am much annoyed with the search icon here. I think it better to have none. As I failed ever to find an article with search I had to put it here You might prove it by typing in search "The Robot Builder's Bonanza" which is in Elect Resources >> Electronic related E-Books. You will get "No results found".