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Found 3 results

  1. I've just started a project "Sensorless BLDC Motor Controller: Modular System" on Kickstarter. It is open source hardware/firmware project. https://www.kickstarter.com/projects/946939931/sensorless-bldc-motor-controller-modular-system Event driven finite state machines (FSM) approach was used for this sensorless BLDC motor controller firmware. The programming language is C and there is no operating system. It was implemented by myself from scratch based on the well known motor control, other algorithms and the firmware is a totally open source product. What the implemented firmware can do? Uses a 31.25 kHz symmetric PWM scheme to better detect BEMF zero crossing 12-bit ADC configured as a window comparator makes more error prone zero crossing detection, especially on a start Initial Position Detection (IPD) algorithm was implemented based on Variable Inductance Sensing Method A rotor revolving direction can be changed any time on a fly, that can be used for "reverse braking" Safety stop when a motor stalled Motor speed control (start, stop, up, down, duty cycle %) and obtaining a real time telemetric data (speed, voltage current) using serial UART interface configured for 460800 bps Motor speed control using standard 1...2 ms PPM of remote control (RC) devices I hope it can help an engineering community. Thanks.
  2. albertRM

    How read DHT11

    Hello everyone, I just started programming in C ++ to solve a small university project. I am a newbie in programming that's why I ask you a hand in writing the code. I'm working with Msp430fr5739 and the temperature and humidity sensor is the DHT11. The connections have already been made and we have to write the code. I already have the library DHT11 and I'm working in CCS. Can someone share a code that works and allows me to read the values of temperature and humidity? Thank you (and sorry for my english)
  3. Hi All, My company is interested in developing passive sensors that are capable of harnessing energy from the environment, so basically the sensor are completely dead and without power until there's either light, temperature difference, vibration, or RF illumination. So I do not care about high current draw in sleep mode. In this type of environmentwhat would work best? MSP430FR? or M0+? Current draw during start-up on the MSP430 is also a problem, which is roughly 1 ms. Looking at the EMF32 Zero Gecko, Its list as 400us with a 24MHz clock. It seems to me that Zero Gecko would be a better choice, but from uA/MHz FRAM based MSP430 is a better choice. I don't need to do any crazy computation here, all I need is for the ADC to measure a time decay, and send it back out through a wireless tx module.
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