user7143

Most recent activity

• read battery value

  in Interfacing • 9 years, 7 months

  

  You could always poll the GSM board using the AT command for battery voltage.

  at+cbc will return current state of battery charge.

• Thyristor SCR instead of a relay?

  in General • 10 years, 4 months

  

  @DrAzzy I am glad that I posted a link to the N mosfet tutorial even though it was incorrect! As it looks like you have provided great information to the Espruino user community as a result. I don't see the photos that are referenced in the tutorial. Am I doing something wrong when viewing Github or are they not posted yet?

  Thanks again for your informative post.

• how to get a stm32f3 discovery board into boot loader mode?

  @user7143 started

  • 5 comments
  • 5,756 views

  @Andrey replied
• Thyristor SCR instead of a relay?

  in General • 10 years, 5 months

  

  You might want to consider using a power Mosfet to switch on your light bulb like the one in the link below. They even reference switching on a car headlight with a 5v micro controller.

  https://www.sparkfun.com/products/10213

  Sparkfun sells a couple of breakout boards to switch loads using Mosfets.

  https://www.sparkfun.com/products/11214

  https://www.sparkfun.com/products/10256

  p.s. I am not connected to this Sparkfun in any way other than being a customer.

  If you want to control AC loads solid state relays seem to be simpler to interface with a microcontroller

• Supplying steady 5v to the board from inconsistent battery pack

  in General • 10 years, 5 months

  

  Are you trying to switch a AC or DC load with the relay?

• TMP102 module

  @user7143 started

  • 5 comments
  • 4,287 views

  @Gordon replied
• TMP102 module

  in Interfacing • 10 years, 5 months

  

  I will attempt to add this at the weekend.

• TMP102 module

  in Interfacing • 10 years, 5 months

  

  I created this module today. It allows Espruino board to interface with a TMP102 temperature sensor. It is accurate down to 0.0625 of a degree.

  I2C1.setup({scl:B6,sda:B7});
  var TMP102 = require("tmp102").connect(I2C1);
  console.log(TMP102.getTemperature());
  

   
  function TMP102(_i2c) {
      this.i2c = _i2c;
      this.address = 0x48;   
  }
  
  TMP102.prototype.getTemperature = function() {
      var self = this;  
      var d = self.i2c.readFrom(self.address, 2);
      var temp = (((d[0] << 8) | d[1]) >> 4)*0.0625; 
      return temp;
  };
  
  
  exports.connect = function (_i2c) {
      return new TMP102(_i2c);
  };
  

  https://www.sparkfun.com/products/11931

• SPI question

  @user7143 started

  • 32 comments
  • 11,611 views

  @Gordon replied
• SPI question

  in Interfacing • 10 years, 5 months

  

  I tested and this code works. Just need to change one last item that Possmann stated above and its ready to be added to the modules. I spent some time working with I2C over the weekend and can provide a couple of other temperature modules to post soon.