Free sample chips!

[kumaran]

Ante,

I tried your suggestion. Three IC's never draw any current from the output pin when I moved the magnet nearer to IC while the circuit powered.

I replaced with another new Hall Effect IC. Measured and got voltage around 1 - 2V. So the IC works. Probably the IC damaged previously.

Anyway I have switched to simpler method by using reed switch with 555 timer IC.

I'm using 555 timer IC in order to control trigger width and pulse width. I have enclosed the circuit diagram.

I still encounter some problem. The circuit is stabe if I connect LED at output of second 555 timer IC. If I connect the output from second 55 timer IC output direct to 2N3055 base, both 555 timer IC get hotter and the result goes crazy (unstable).

Maybe today I will try method below :

reed switch -> 555 timer -> LM358 -> 2SC1061 -> 2N3055
Power Source : 12VDC

Hope this works. Your comments highly appreciated.

View attachment 35744

 

[ante1]

You say the 555 get hot, I must ask (with the risk of being rude): is the 2N3055 correctly connected? I think maybe you need a resistor at the base, how is the load connected? The 555 can at 12V with output high sink lots of current trough the emitter diode and load (if any) to ground. This can be the reason for the heat.

 

[kumaran]

Thanks for the advice Ante, will try out soon. FYI, yesterday I tried with the setup below :

reed switch -> 555 timer -> LM358 -> 2N3055

These setup is using single 555 timer. The ICs never get hot and runs stable. Manage to control pulse width but unable to get trigger width. When ever I use two 555 timer as in the diagram, the second 555 timer IC gets hot and unable to get the expected result even I reassemble the whole circuit again.

OK, may be you were wondering what project I'm doing currently. I'm doing R&D on pulse DC motor. According to the internet source, these type of motor if tuned and setup correctly will become Overunity(OU). It means free energy. You get excess of output compare to input source. Skeptic? So was I initially.

I have been studying these stuff for a long time. Manage to see positive result few months back by just using basic method (reed switch -> transistor) but cannot confirm. Saw some voltage of the baterry increase while the motor was running. This is enough for me to continue research.

In order to enhance the setup I got to use a bit advance electronic parts. Since I'm new to electronic, I do a lot of trial an error :'(.

Maybe those interested can join to do this exciting/fun project. Some of the related links listed below :

1) http://www.geocities.com/theadamsmotor/
2) http://theverylastpageoftheinternet.com/menu/pulse_motors.htm
3) http://theverylastpageoftheinternet.com/menu/muller.htm


My project right now is the (1).

 

[ante1]

Sceptic, yes absolutely. Basic rules: You can

 

[kumaran]

Ante,

Is it some kind of commutation for a motor like in a brush less fanmotor for instance?

Yes, you are right. When rotor magnet approaches Hall Effect IC, it sends signal to transistor to induce current for stator. Now stator become electromagnet to push the magnets away (repulsion). Basic concept.

reed switch -> 555 timer -> LM358 -> 2N3055 (works)

For this type of motors, precission and pulse width are very critical and important. Reed switch and hall effect ic will not produce the result if magnets on rotor arranged nearer.

I find opto switch is the best for this purpose. I need precission. Pulse width can be controlled by 555 timer. I have tested this method yesterday and it works. Today & tomorrow I will try to fix into my project motor. Will inform you the outcome.

Sceptic, yes absolutely. Basic rules: You can

 

[MP1]

kumaran, It has been 5 posts since this thread was about sample chips. I am surprised the moderator of this section has let it go. Yes, please post the conversation about your project in it's own place. I keep getting notices about new conversations to this thread and they are not about sample chips.

MP

 

[kumaran]

Noted. Sorry MP. I have created new category "Adams Motor Project " under Electronics chit chat section. For those who willing to share experience on this stuff please post it under this category.

 

[anananh]

Hi everybody,
I used to get samples from maxim, but now they don't send me anything. I receive an email from Alice_Loh@ maximhq.com when I make a request, and I know I will receive nothing. >
Can you still request samples from maxim?
By the way, I can't go to the page with www.geocities.com/???, can anyone tell me why, and how to access.
Thanks.

 

[anananh]

Can anyone tell me how to get a FedEx account.
Thanks.

 

[MP1]

anananh, I think you have to be a business or organization to get a Fed Ex account. Likewise with the sample chips. You have to register as an engineer or business to get them from Maxim. How did you register? Many companies will never send sample chips to students or individuals.

MP

 

[anananh]

Oh, I told them that I was a student and they sent me some samples, but now they deny. I don't know what happened, I used to received confirmming letters from samplesadmin@ maxim-ic.com, but now I receive them from Alice_Loh@ maximhq.com and no sample to me. ???

 

[taujin]

anananh, i got the same problem as you before. Then i mail to the info@ maxim-ic.com to check for my sample request. After a few days, Alice replied, informing me that the samples have been shipped. Then, after another the 2 weeks, the samples finally arrived! (Late... better than never ).

Maybe it's because we are registered under the title of "student", that's why they are not interest in ship us any samples.

 

[anananh]

Thanks Taujin, I'm gonna drop mail to them

 

[JFDuval]

Hi!

Is anybody know where I can find samples of modulator/demodulator, like UM3750 ? Thanks,

 

[jin29_neci]

;D
thanks guys
i think this will help me !!

Regarding my self study in electronics

thanks anyway guys ....

 

[zoki008]

Hi!
Does anybody know some manufactorers of ultrasonic transducers who send free samples. I wanted them to build ultrasonic motion detector.
Thanks!

 

[ngt]

I have requested some parts from NT. At first my 1st mail at hotmail required that i pay because they had too many req from that email provider. After that i put my other mail, but someone after 2 days reported that they couldn't give me samples.
ANd all these because i am wrote no company i just put student..
I had requested 5 X 3914LM.

 

[Andy_M1]

Hello!


I tried to get some samples from:http://www.wilcocorp.com
but I can't fill the telephone number in there. Any suggestion?



thanks Andy

 

[Codyhtml]

is there any place that gives samples of motors LEDs relays etc plz let me know

 

[Yevgenip]

http://www.marktechopto.com/products/listing.cfm?Drill_Level=Series&DeptID=300&SeriesID=1429