The mbed Microcontrollers are a series of ARM-based microcontroller development boards designed for fast, flexible and low-risk professional rapid prototyping.
7
votes
6answers
980 views
What makes a particular platform suitable or unsuitable for production use?
Let's assume that the cost of goods is an insignificant factor. If a company lacks a team to produce a custom board for a particular product, but has success with an off-the shelf development ...
5
votes
2answers
423 views
Using Nixie Tubes
With some (very) rusty electronics knowledge I thought I'd have a crack at getting some Nixie tubes to display using my microprocessor (an mbed). It seemed so simple, but the information I can find ...
3
votes
5answers
771 views
mbed as a programmer
For those of you that haven't heard of the mbed I'd highly recommend having a look at it for rapid prototyping!
So, the mbed is a 100MHz microprocessor that appears as a usb mass storage device when ...
2
votes
3answers
1k views
Stepper Motors (on mbed, not arduino)
There is some information on chiphacker about using an arduino to control stepper motors (I'm driving Bipolar, 4 wire, motors), however I'm finding it hard to know how to control a stepper motor using ...
2
votes
1answer
200 views
Can an mbed device be damaged by something drawing too much current?
The mbed has a pin which supplies 3.3V regulated current. I think it can supply up to 100mA. If this pin is used to power a device, and the device tries to draw 150mA, then what can happen? Is the ...
2
votes
2answers
899 views
How to bring a digital input pin to high state?
This sounds really very easy, but I'm afraid to try it because I don't want to fry my microcontroller.
I'll use an Arduino for an example, but it should be the same for all microcontrollers.
...
2
votes
1answer
583 views
Inverting the input and output of a UART
I'm talking to a sensor using RS232 and the UART of an mbed. However I've noticed that the bits sent to and from the sensor are the exact complement of what they should be. What my mbed sees as a 1, ...
2
votes
1answer
966 views
How to read the device ID of a dataflash memory
I am trying to read the device ID of a serial flash memory by using the SPI connections on an mbed. In the datasheet for the serial flash memory W25Q80 there is this figure.
The following is the ...
1
vote
5answers
273 views
Does reset do the same thing as shutting off the power to this device and turning it back on?
I am trying to control a serial dataflash memory through an mbed. It is an AT45DB021B and the datasheet is here. It has a reset pin that I have wired to the mbed so that a software reset can be done. ...
1
vote
2answers
296 views
How to connect mbed to computer
How do I connect my mbed NXP LPC1768 to my computer. I have a USB cable and a breadboard. What else do I need? What connections do I need to make?
1
vote
1answer
310 views
How should I debug my mbed project?
I'm using an external power source to power an MBED module. I have the UART transfer and receive ports connected to a MAX232 level switcher in order to make the signals compatible with RS232. From ...
1
vote
3answers
242 views
Are pull-down resistors included in the mbed USB ports?
For the mbed LPC 1768, I am trying to establish a USB connection with an external device (pins 31, 32, and 39 for D+, D-, and Vbus, respectively). According to USB in a NutShell: Connectors, a 15kΩ ...
1
vote
1answer
154 views
Can the frequency of the SPI sck on an mbed be adjusted?
I'm trying to control a serial dataflash memory through the SPI interface of an mbed. SCK from the mbed is connected to CLK of the dataflash memory. I'm not sure, but I'm starting to suspect that this ...
0
votes
3answers
208 views
This flash memory works without connection to a power source or gnd?
I am doing a project where I need to store information into flash memory and read it back using an mbed. I can't get it to work right, but I noticed that even if there is no connection to power or ...
0
votes
2answers
233 views
How to make an mbed print text from ascii codes
I want to send Ascii codes to an mbed and have it print Ascii characters which can be seen from Hyperterminal. How can this be done? I looked at the mbed website and found nothing about keyboard input ...
0
votes
1answer
134 views
How to write data to this dataflash memory
I'm trying to write data to a W25P80 dataflash memory using an mbed. The documentation says there is a read data instruction for reading data from a section of memory by sending the opcode 03h ...
0
votes
2answers
267 views
Having some issues with RFID reader
I just received an RFID reader from Parallax (#28440) to play with, and am having some problems getting it to send me data. I'm interfacing it with the mbed microcontroller that I also just received.
...
0
votes
1answer
102 views
MBED Controller Module Datasheet and Pin Details
I want to connect the output pins of NXP MBED controller to 16 electromechanical relays,and 32 LEDs,what is the best way to do this?The relay would require a current of at least 300mA and LED would be ...
0
votes
2answers
544 views
How to read RCA output from an mbed?
I'm wanting to buy this IR camera but it says it has RCA output. Is it possible to read this into an mbed without external components(aside from a 12v power source)? If so, how?
0
votes
1answer
49 views
Should one use resistors to protect an mbed when using it to simulate keyboard key presses
One can use mbed to act as USB Host or as a USB Device. One use of the latter is to have it emulate a USB Keyboard by sending normal key presses. The general page on using mbed as a USB Device is in ...
0
votes
1answer
118 views
Using a laptop to communicate with an MBED module
I'm using an external power source to power an MBED module. I have the UART transfer and receive ports connected to a MAX232 level switcher in order to make the signals compatible with RS232. From ...
