Tag Archives: tutorials

DIY polarity Led tweezers

via Dangerous Prototypes


Jesus Echavarria shared detailed instructions of how to make a simple tweezers for checking led polarity:

I usually assemble by hand all the boards I make. I use SMD components, especially in 0805 format for resistors, capacitors and leds. With the last ones, I always have the same problem: I need to check the polarity of it, to ensure that I assemble on the right way. To do it, I need the multimeter, select the diode position and test the led’s for the right polarity. Because on the assembly process I don’t usually the multimeter, why don’t make a tweezers to test the led’s? It’s an easy and very cheap project, and you’ll have a usefull tool when assembly boards. Here’s the result, after a couple of hours working on it ;).

More details at Jesus Echavarria’s blog.

MQTT with lwip and NXP FRDM-K64F Board

via Dangerous Prototypes


Erich Styger from MCU on Eclipse writes, “In this article I show the basic steps to get MQTT running on the NXP FRDM-K64F board using MCUXpresso IDE, lwip and MQTT. lwip ois a small and open source TCP/IP stack which is widely used. To keep things very simple in this first post, I’m using it in bare-metal (no RTOS) mode with no encryption/security. The principle applies to any IDE/toolchain, as long there is a lwip port available for your board and IDE/toolchain. I’m using the MCUXpresso IDE as it nicely integrates with the MCUXpresso SDK which includes a lwip port for the FRDM-K64F.”

More details at MCU on Eclipse homepage.

Tutorial: Using Eclipse with NXP MCUXpresso SDK v2 and processor expert

via Dangerous Prototypes


Erich Styger from MCU on Eclipse writes:

To me, software and tools are by far more important than the microcontroller. Because the silicon is a ‘one time kind of thing’, where the software has to be maintained and working over a longer time. And at least my software usually needs to be ported to a new device, so portability and available software and tools are critical to me.

The combination of MCUXpresso SDK (formerly Kinetis SDK) and Processor Expert is unfortunately not supported by NXP. But I have found a way to get them work together in a nice way, and this article is about making that combination possible :-).

More details at MCU on Eclipse homepage.