Unanswered Questions

7
votes
2answers
194 views

Understanding cause of arcing in AC filter circuit

I have an induction hot-plate that one day blew a fuse in my distribution panel when plugging it in. (With the obligatory smoke from the device of course...) On visual inspection, only the AC filter ...
6
votes
0answers
179 views

History of the MSP430

This question crossed my mind today. What is the history of the MSP430? When did it start, what did it evolve from, why was it made (i.e. what goals was it trying to achieve/what technical ...
6
votes
0answers
367 views

Unable to get bootloader working on custom PCB with AT32UC3L

I have designed a PCB for a client recently, everything is fine with the hardware and software (application is working as it is supposed to). Now we are facing the need to update the program inside ...
5
votes
0answers
145 views

Implementation of AES algorithm using Systolic architecture

I need to generate a VLSI Systolic array to implement the AES encryption algorithm with key length of 128 bits. Following are the possible ways : Systolic for Key expansion Systolic in MixColumn ...
5
votes
1answer
383 views

Battery powered sensor node power down circuit

I am using the BQ24079T to control power for a wireless, battery powered sensor node. The MCU will operate in one of two modes: periodic sample mode where it takes sensor readings and then sleeps, or ...
4
votes
2answers
51 views

How to maintain EMI shielding whilst penetrating the shield with cables?

I'm trying to shield an ip camera from EMI generated image noise for low light photography. It's enclosed within a metal box that is then grounded. The subject is also inside the box. The camera ...
4
votes
0answers
47 views

How to disconnect voltage from BeagleBone Black expansion pins?

I'm trying to create a cape that will safely power my BeagleBone Black from my car's electrical system. The design I am using is based on the one from this answer. The circuit there suggests a simple ...
4
votes
1answer
89 views

Designing an optimal BPSK and/or QPSK transciever in SDR

I'm currently working on writing firmware for the modem on a cube satellite for my university's satellite team. My primary goal is to implement the data uplink & downlink. The RF system, ...
4
votes
1answer
71 views

How appropriate are the open source licences currently in use for inclusion of HDL cores in a commercial product?

HDL IP cores targeted towards ASICs, FPGAs or both are often very useful for adding functionality to a project quickly. Commercially licences cores are available from many sources for a range of ...
4
votes
4answers
254 views

Properly grounding 2 MCUs using I2C

I'm building a mechatronic system that consists of 1)XY Gantry controlled with PIC32 and a DIY motor shield and 2)control box with PIC24 three potentiometers + room for expansion, typically located ...
4
votes
2answers
310 views

How to convert files from Cadence to Eagle CAD?

Is there any free software that can convert Cadence files (.dsn, .opj, .brd) into Eagle CAD files (.brd, .sch)?
4
votes
0answers
369 views

AHRS algorithm under continuous linear accelerations

I have tried several algorithms to get pitch, roll and yaw under continuous linear accelerations and vibrations (smaller than 0.4g, frequency lower than 10HZ). None of them give good results because ...
4
votes
1answer
318 views

Difference between virtual and ground plane

Ive created two PCBs, a power board to output a +-5V supply and a midway voltage reference (using the TLE2426) at 0V. This PCB powers a biosignal acquistion board shown in the spice diagram below. ...
4
votes
3answers
1k views

DIY NFC boosting antenna for a mobile device

I am very new to this. I'm a dentist trying to improve client flow in a busy office. I would like to develop a cheap proof of concept for an NFC enabled client tracking system using a hacked mobile ...
4
votes
1answer
308 views

Miniature wireless distance sensor

I am novice in electronics, so please bear with me. I am searching for a small distance sensor (as small as possible) that I can use to measure a distance between 0 and 30 cm precisely (precision ...

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