11
votes
0answers
556 views
Resistive touchscreen 5-wire connection with a Freescale imx28
I've already asked on the Freescale forum, and also opened a service request in Freescale web site, but, for now, no one has responded.
If this isn't the right place for this kind of question, please ...
8
votes
0answers
339 views
How can V-USB screw up the built-in SPI of an ATmega328p?
I'm working on a V-USB project that shows up as a Keyboard using an ATmega328p. The USB part is working great (it's not my first V-USB project), but after I start the V-USB stack with ...
7
votes
0answers
181 views
Differences between a planar coil and coplanar waveguide to create a local 1D AC magnetic field
Coplanar waveguides (for example picture look here) are often used in research to create a local in-plane magnetic field. Now if compared to a planar microcoil like this,
driven by a AC voltage in ...
6
votes
0answers
69 views
Arduino serial communication protocol design
I make a drum sequencer interface for electronic music.
It uses an arduino mega as it's microprocessor, and currently it interfaces to a Processing program that I wrote for serial communication. ...
6
votes
0answers
154 views
What is the “loaded resistor” for ultrasonic receivers?
I have an ultrasonic receiver (datasheet available here). On page 2, there are two graphs plotting sensitivity variation and center frequency shift versus "loaded resistor":
What does "loaded ...
4
votes
0answers
86 views
Help to identify unknown Sync Serial Bus
Does somebody already seen a sync serial bus communication like that ?
Repeated Pattern :
Detail of beginning :
I fail to identify it...
it look like I2C but :
it have a clock at 2MHz (so ...
4
votes
0answers
74 views
How to use SCPI on HP33120A via RS232?
I have old Hewlet Packard 33120A function generator (it should be the same type as Agilent 33120A) and I would like to control it with MCU (ATMega). The generator has RS232 and use SCPI commands.
I ...
4
votes
0answers
91 views
Minimal redistributable coregen output for command-line rebuilds
I'm building an SoC with my own soft-core, and I want people to be able to easily rebuild it using Xilinx webpack command-line tools. I'm using coregen's Clock Wizard to create a clock module, but ...
4
votes
0answers
475 views
SPI Seems garbled on MSP430
I'm trying to get sensible bits out of a Bus Pirate hooked up to a Launchpad board (Using the Sparkfun cable: Orange goes to P1.6, Yellow to P1.5. This should be correct, unless I have MOSI and MISO ...
4
votes
0answers
206 views
Serial data transfer from Omega DP80 legacy hardware to computer
Can anyone provide me with some guidance on setting up a legacy serial connection on an Omega (brand) thermocouple display? I would like to use the serial data interface (Omega DP80-Ser) to reliably ...
3
votes
0answers
38 views
Handling Transient Currents on USB Powered Devices
I'm working on a USB-powered speaker design and could use some thoughts or design inputs from the community.
The data part is pretty simple - USB powers an I2S bridge that talks to an I2S amplifer. ...
3
votes
0answers
58 views
Ideas for actuation/actuators besides motors
I have a 1 cm piece of standard rubber tubing with a 1 mm hole at exactly one point along the surface of the tube.
Probably doesn't warrant a picture but just for clarity:
I would like to ...
3
votes
0answers
86 views
Designing a Moore Machine
hopefully this post isn't too long, I am going to try to give you as much relevant information as possible so you can answer this easily.
For a class project, I am required to design a Moore Machine ...
3
votes
0answers
136 views
Joule Thief - operation and the 'supercharged' version
I've made a joule thief, and it works fairly well, but not as well as I would like.
It's powering a 3.2v LED from a 1.2v battery, but it's very dim. I'm hoping increasing the voltage from the JT ...
3
votes
0answers
110 views
How to Dim HID Lamps
I am building a street lamp controller that should be able to set a street lamp to on, off, or dim state. I have successfully built an incandescent lamp dimmer (phase dimming - using zero cross ...
