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Found 8 results

  1. Hi all, I'm currently doing a project consisting of msp 432 launchpad along with cc3100 BOOST. I need help in powering the msp and boosterpack from an external supply.I have a a 5v and 3.3 v regulator with me. Please help.
  2. Hi, I am working with TEA5767 FM module to receive FM Audio. I have noticed a peculiar issue. When the launchpad is powered by my Laptop the communication works (only MSP430 <-> TEA5767 on I2C ) and I am not using the Serial which will anyway require my laptop. But when i power the Launchpad using a wall wart phone charger which is also @ 5V . It doesnt work at all. Since i am not using Serial. Laptop should not be required. The code is given below: #include <Wire.h> unsigned char frequencyH = 0; unsigned char frequencyL = 0; unsigned int frequencyB; double frequency = 0; double channels[6]={91.1,93.5,94.3,98.3,101.0,107.4}; unsigned int i=0; void setup() { pinMode(PUSH2, INPUT_PULLUP); Wire.begin(); // Serial.begin(9600); frequency = channels[0]; //starting frequency setFrequency(); } void loop() { if(!(digitalRead(PUSH2))) //If button Pressed { while(!(digitalRead(PUSH2))) //Release the Kraken!! { delay(100); } if(digitalRead(PUSH2)) // Now Released .. Whoosh { if(i==6) { i=0; } frequency = channels[i]; //starting frequency setFrequency(); //Serial.print("Current Channel: ") //Serial.println(channels[i]); i++; } delay(1000); // Keep Going but slowly! } } void setFrequency() { frequencyB = 4 * (frequency * 1000000 + 225000) / 32768; frequencyH = frequencyB >> 8; frequencyL = frequencyB & 0XFF; delay(100); Wire.beginTransmission(0x60); Wire.write(frequencyH); Wire.write(frequencyL); Wire.write(0xB0); Wire.write(0x10); Wire.write((byte)0x00); Wire.endTransmission(); delay(100); } Thanks !
  3. Hi 43oh! It seemed like there was some interest in my solid state relay board, so I figured I'd post up the design files. Because of liability reasons (being high voltage and what not) I can't produce this, but your welcome to get some boards made and solder them yourself. Be warned, soldering the heat-sinks to the board is VERY DIFFICULT! You'll need a board pre-heater, hot air, and some good flux. Schematic: triac_board.pdf Design package (in EAGLE 6.5): triac_board.zip Cheers!
  4. I'm trying to create an interface to collect data from some sensors using MSP-EXP430F5529LP. The sensor setup is powered with 3.3V and draws about 10mA. I noticed J10 on the LP has 3.3V and GND. When powered with USB, can this provide enough power? If not, I'll need to hook up VREF+ and VREF-. According to the data sheets these are pins P5.0 and P5.1. How can I hook up to these, as they don't seem to have a place on the 40-pin headers?
  5. Hi all, I have an msp-exp430g2, my power supply is from USB and i have another unit (LMR61428) that convert 3.3 volt to 5 volt. I need this conversion unit to work only when I need. if i connect it to the VCC pin, it works all the time. Ive tried to connect it to an I/O pin that I can program to be on and off but the current output from the I/O pins is to low. Is there anyway to program the VCC pins on and off? or to increase the current output of the I/O ports? P.S. i tried to build an electronic switch with a bi-poler transistor but i couldnt make it work Thanks, Ofer.
  6. On the stellaris, is it possible to power from VBUS while using debug usb? I was intending to use the debug serial sometimes to connect to the board, but I want it to run all the time, even when not connected to the debug USB. Is this possible?! I was going to source a 5v power supply to run the VBUS. thanks!
  7. I am using the Tiva C LaunchPad as a USB host for a USB device that requires a small amount of power. The USB host connector for the Tiva C LaunchPad does not supply any power, so currently I am providing this via a breadboard, however to make my prototype cleaner I am wanting to supply power via the USB. One suggestion I received was to short circuit SW3, and that this will provide the LaunchPad and also the USB host connector with power via the ICDI USB connector. I wanted to get opinions about this solution, and whether anyone sees any potential issues? Oh and if I was to do this....I am assuming I would do it by connecting the outer pins of the switch, while leaving the center pin alone??? Glenn.
  8. I tried it for test and it works. I am not sure if it is efficient or not though.. ?