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  1. Amar Dhore

    Newbie needs help with floating signals

    what module is that? Can you send a link?
  2. Amar Dhore

    PWM - pic18f4550 - led + potentiometer

    Assuming you are using 8 bit micro, For MPLAB, you can go through this Microchip's wiki: http://microchip.wikidot.com/8bit:10bitpwm or if you have MPLAB with Harmony, you can generate code using Harmony configurator or use the Harmony example code.
  3. Amar Dhore

    Controlling a motor speed - by Raspberry pi

    Check petercuenca link for digital to analog signal with Raspberry.
  4. Amar Dhore

    Controlling a motor speed - by Raspberry pi

    Your Datasheet says: external voltage (0.5-5VDC) can be used to control the speed. Well if you give 0.5v signal, the motor will run with 400rpm (min) and if you give 5V it will run with the full speed. Do you want control the speed of the motor or you want it to be a constant speed?
  5. Amar Dhore

    Location devices

    Bluetooth LE is a way to go for your application. Search for Proximity profile in https://www.bluetooth.com/specifications/adopted-specifications. This can do what exactly you want.
  6. Amar Dhore

    Tach Signals

    The only way I know to compare chip is, Datasheet. But I did not see any datasheet available online.
  7. Amar Dhore

    Tach Signals

    I do not have enough information online about this chip, but here is what I would do. Measure TACH signal and compare it with the older signal. Find out how different the signal is compared to the older one. Is it half or double. Then you can buy or design a circuit which would convert the...
  8. Amar Dhore

    Tach Signals

    What did you change/ Why chip is not reading the TACH signal correctly? what BMW/car is it? How many cylinder model?
  9. Amar Dhore

    Wireless Anti Theft Solution for Tablets

    You need 2 BLE, 1. For the tablet 2. Can be any device compatible with BLE (in your case, android). You might need to use a Proximity profile. Whenever BLE master stop receiving signal, issue an alarm.
  10. Amar Dhore

    Tach Signals

    I could not locate the datasheet online for HLM. Do you have any link to it?
  11. Amar Dhore

    Wireless Anti Theft Solution for Tablets

    Yes, you are right. So you can not work with internal bluetooth, Other option would be to have BLE module outside the tablet. This would be another inexpensive way to do it.
  12. Amar Dhore

    Getting started making PCB with software like Eagle

    Lol. 10 boards for 10$ ..wow.. that's a great price. Thanks for sharing it.
  13. Amar Dhore

    Serial port communication

    This could be another option: WIZ105SR (google wiznet) device to send serial data to the server over HTTP.
  14. Amar Dhore

    code for running 2 relays using 2 push buttons

    Make sure your analog pins are disabled. Add denouncing for Push button (wait for button release for few mSec). I would try the code without LCD first, once my relays are working, I would work on LCD. In your code, I am do not see you calling while() loop in the main function?
  15. Amar Dhore

    Arduino momentary input to turn on consecutive outputs

    You should be saving lastButtonState if(buttonState != lastButtonState) lastButtonState = buttonState //try this line
  16. Amar Dhore

    Reverse engineering a hoverboard (with wheels) accelerometer

    If its a one wire communication, and there is no clock, it could be a PWM signal.
  17. Amar Dhore

    Quad buffer / line driver tri state circuit test rig

    Try this: http://www.eecs.tufts.edu/~dsculley/tutorial/opamps/opamps6.html
  18. Amar Dhore

    code for running 2 relays using 2 push buttons

    I would connect my LEDs to the Collector of Q2 and Q3 through suitable resistors, so you get the actual status of the relays.
  19. Amar Dhore

    help me using Serial Peripheral Interface with AVR..

    SPI basics: https://learn.sparkfun.com/tutorials/serial-peripheral-interface-spi
  20. Amar Dhore

    Rotary switch - detect which connector??

    I am not sure what kind of sensors are you using but let me throw an Idea. I would have 6 different voltage bias for 6 sensor, this way when I read the value I can differentiate between 6 sensors. Make sense?
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