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  1. K

    Adams Motor Project

    What is Adams Motor? Why it is so special? Please read through the links below in order to get basic understanding. 1) http://www.geocities.com/theadamsmotor/ 2) http://theverylastpageoftheinternet.com/menu/pulse_motors.htm 3) http://theverylastpageoftheinternet.com/menu/muller.htm
  2. K

    Free sample chips!

    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.
  3. K

    Adams Motor Project

    Hi all, Has anyone experience in building Adams Motor or Ed Gray Motor ???
  4. K

    Free sample chips!

    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...
  5. K

    Free sample chips!

    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...
  6. K

    Free sample chips!

    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...
  7. K

    Free sample chips!

    Ante, Attached is the data sheet for HALL-EFFECT SWITCHES I have used. I have tested A3121LLT, A3122LLT & A3123LLT. Non of them working. Power source 6V battery. I connected the output from Hall IC to 2N3055 base. Beeper connected to 2N3055. By logic it should work. Your comment...
  8. K

    Free sample chips!

    I have ordered sample for hall effect IC's from Allegro Microsystem. There are 6 types all together. So far I have tried 3 different types. Guess what... non of them are working. The function of Hall Effect IC is like reed switch. Turn on when in presence of magnet. But these IC's not doing the...
  9. K

    Free sample chips!

    I have ordered some samples from Allegro Microsystem on 27/07/2004. They reverted instanly that they forwarded the orders for approval. Waited 1 week no sign of getting anything. Forward the email I received and ask about the status of the order. Reverted with the status "ship to customer"...
  10. K

    Free sample chips!

    mixos, Special thanks for you for the info. I just received the chips that I ordered 3 days ago from TI without any fee to pay. ;D Nice packaging. Unbelievable. :o
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