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alireza

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About alireza

  • Birthday 07/11/1982

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  1. Thank you audioguru using microcontrollers is the best answer, but I want to use analog circuit.
  2. Hi everyone I want to build an analog circuit that consists of 4 parts. Part1 is a simple adjustable square wave Part2 changes the duty cycle of the wave generated from Part1. Part3 shifts the phase of the wave generated from Part1. Part4 changes the duty cycle of the wave generated from Part3. I need two signals from this circuit: Signal1 from Part2 Signal1 from Part4 it is clear that I need four potentiometers for adjusting in all the parts. Can anyone suggest a simple circuit for the blocks?
  3. Hi everyone I have a 3vDC solenoid like this http://www.alibaba.com/product-gs/266566490/DC_solenoid.html I want to build a miniature actuator that its task is, when the trigger key is pushed, after 5 seconds the solenoid is triggered for only 0.5 second. I have no large space for circuit and the battery. I will use SMD components for the circuit and a Li-Po battery like this http://www.alibaba.com/product-gs/321994480/lithium_battery_RC_toys_battery_HGB602026.html But I think the power of a small battery is not enough for trigger the solenoid. Can I charge a capacitor and discharge it to the solenoid? what is the best compact, low weight and reliable design? (the life of the battery is not important for the application. Suppose that the actuator is only once used for its life)
  4. Hi I want to build a PCI card for my university project, but I don't know anything about it. is there anybody who introduce a book or pdf about its pinout? how does it work?... how does it transfer and receive data to cpu?... how does it communicate with other devices?... which protocol does it use?... and etc...
  5. dear friends I look for a dc motor with max 30VDC, 1-5 rpm and 4-10 kg.cm Torque Where can i find it in the web and buy it? Thank you
  6. Hi everyone I've found a shaft encoder from my university for one of my projects. but I couldn't find its datasheet. there are 15 pins on it. I need its voltage and amount of pulse/revolution. Is there anybody who can help me? yours sincerely these are two pictures of it:
  7. Hi everyone I've found a shaft encoder from my university for one of my projects. but I couldn't find its datasheet. there are 15 pins on it. I need its voltage and amount of pulse/revolution. Is there anybody who can help me? yours sincerely these are two pictures of it:
  8. Hi there where can I get a good datasheet how the mice work ?
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