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0
votes
1answer
39 views

Dahlander winding: Does the voltage rating change between connections?

From my understanding, "normal" motors in delta/wye connection, have rated interphase voltage of 220V in delta, 380V in wye. But how about Dahlander motors? These are motors that are built to achieve ...
7
votes
3answers
760 views

What actually happens when we set direction on GPIOs in controllers ?

Generally, while working on GPIO pins of any controller/device, we set the directions for the GPIO pins. Let's say in LPC2148(ARM7 core) controller, we have IODIR to configure the direction of Pin. We ...
0
votes
0answers
46 views

DSPIC30F4011 - Need Help with Sequential 4 channel ADC Scanning

I am working on a project with some friends which calls for several IR proximity sensors to be sampled sequentially (The emitters must be powered up individually) but I am really struggling with the ...
1
vote
1answer
65 views

Where are details regarding peripheral configuration for STM32 controllers in datasheets?

I have recently begun working more with STM32 processors coming from the more simple Atmel 8bit variety. The Atmel datasheets are very nicely laid out -- specifically speaking to how they provide ...
1
vote
1answer
80 views

Is it possible to get an exponential capacitance curve from coded dip switch

I have a capacitor that controls frequency for a specialty IC with the relationship \$F \propto 1/C\$ I want to be able to get a number of frequencies in evenly spaced intervals. Currently I have a ...
1
vote
1answer
69 views

FPGA + SRAM - floating inputs of SRAM during configuration of FPGA

I'm connecting SRAM to FPGA (Spartan 6). During configuration and during periods when FPGA will be down (for example I would like to turn off FPGA when external flash will be programmed by uC) address ...
3
votes
2answers
104 views

Can not keep pin LOW during FPGA configuration

I would like to have a control signal that stays low all the time and goes hi only when I tell it to. Initializing the pin in the entity does not seem to set the value to zero (xc6slx25-3ftg256): <...
5
votes
3answers
118 views

Why are T-Filters better than L-Filters?

I was watching a beginners video about electronic filters. In that video, the presenter shows the same filter (same inductance and capacitance values) configured as an "L-Filter" and a "T-Filter" as ...
0
votes
1answer
1k views

How to change Bluetooth music receiver's name and other settings using a serial converter (or otherwise)

I'm rather new to electronics but I have a fundamental grasp of the general concepts. I'm not very fluent, however, on the workings of specific devices as of yet (internally, I mean; inside their ...
1
vote
1answer
84 views

FPGA; reconfigure from SPI flash

I have designed a Xilinx Spartan-6 PCI card with SPI configuration interface (please check Figure 2-12 of ug380.pdf user guide). I can program the serial flash through JTAG cable, I can also modify/...
0
votes
1answer
2k views

Hall Sensor NJK-5002-C Configuraion

Here is the link to the sensor I am talking about. Now the problem is that according to the label it has as shown, it says that Brown wire goes to V+, Blue wire to V- and the Black wire goes to Signal....
1
vote
1answer
280 views

Class J RF Power Amplifier

What is a Class-J Amplifier configuration? Does it work in a push-pull configuration similar to an A/B? How is it physically different to an A/B? Where can I see a basic schematic? I have read ...
1
vote
1answer
128 views

Different pin assignment for same regulator

I got 2 samples of LP2905CZ (TO-92) voltage regulator. First sample is made by TI and second on by On Semiconductor. Links of the datasheets: On Semiconductor TI Due to ignorance, I just read the ...
0
votes
1answer
197 views

What are input/output buffers for pads?

As an embedded software engineer I am familiar with "application-level" (if I may call them) pads configuration, such as; function (GPIO, i2c, etc), direction (input or output), active high or low, ...
2
votes
1answer
146 views

Why would an audio circuit output through two caps like this?

I'm studying a circuit that is based on a clone of the Apple Mockingboard from way back when. Being new to EE, the first thing that struck me as odd is why the ...
-1
votes
3answers
282 views

Question about common emitter configuration?

The configuration of the common emitter amplifier is one resistor at the emitter, on resistor at the collector, two bias resistors at the base as shown in this picture : I saw this new ...
3
votes
1answer
347 views

Is there any way to programmatically reset the BWP bit on a PIC32

We have a product using the PIC32MX795F512L out in the field that has firmware in both the boot and program sections. The boot flash is write protected using the BWP bit 24 = 0 in DEVCFG0. The ...
0
votes
1answer
49 views

Configuration an FPGA on installation

I am working on a project using a Virtex-5 FPGA. The small projects that I've worked on with FPGAs has only required me to program the FPGAs on development boards using JTAG or loading the bit file ...
0
votes
1answer
145 views

Two amplifiers in single speaker with different frequency power

I have two amplifiers using LM386. One of them I plan to use for normal amplifier and the second one I want it to be a low pass amplifier/bass amplifier and both of them will be connected to same ...
2
votes
1answer
1k views

How do I reset an FPGA development board to its factory settings?

I have programmed an Altera board in configuration mode so that it runs my program when booted up. Now I want to revert it back to factory configuration. How do I do that?
1
vote
1answer
436 views

Optimal configuration for PLL on LPC17xx

I'm trying to write an algorithm that would pick the best available PLL0 configuration for the user based on F_in and F_cclk. The manual says that I should pick higher F_ref if possible for a more ...
3
votes
2answers
380 views

Rewriting PIC configuration bytes at runtime

My device is the dsPIC33EP64MC202. I have a bootloader which loads a program in flash to run or erases and rewrites that program as directed by serial commands. If possible, I would like to account ...
2
votes
0answers
99 views

How is CC3000 placed in Simple Configuration mode?

I've ordered a CC3000MODR and soldered it to a simple breakout board. In the First Time Configuration it mentions a Simple Configuration mode: The CC3000 is placed in Simple Configuration mode and ...
2
votes
2answers
2k views

VHDL configuration: Selecting architecture

I'm learning the use of configuration statement. For this I've created a top level entity not_gate and an architecture structural. I've also added another vhd file to this program, and that vhd file (...
2
votes
1answer
576 views

Why the emitter is earthed in the Common-Emitter configuration of a Transistor?

While reading the Common-Emitter configuration of a Transistor from a book, they said that the Emitter is earthed...? Then I Googled it and found the same thing... So my question is that why it is ...
4
votes
1answer
367 views

Is it possible for an FPGA to “partially” configure?

I have a spartan 6 board that I designed and am having some configuration issues. I'm using SPI flash to program the fpga (e.g. I use jtag to write the flash and the flash then writes the fpga). The ...
2
votes
2answers
2k views

PIC32 System clock <-> Peripheral clock

In a demo software from Olimex for the PIC32-MAXI-WEB the configuration words for the osc are set as follows: ...
-4
votes
2answers
131 views

Transistor configurations [closed]

I often come across circuits saying that the transistors therein are in common collector (or common emitter or common base) configuration. What is all these configurations about and what is their ...
5
votes
1answer
5k views

What does “configuration” refer to in PCI and PCIe? How is this different from “Enumeration”

I am not being able to find a clear description of what configuration means in PCI and PCIe. I have found something called as configuration space, but without knowing what configuration means, it is ...
0
votes
2answers
312 views

Voltage holder circuit configuration circuit

hi I didn't studies all the circuit configurations and also I'm a newbie to EE. My question is I need to design something like a voltage holder. The idea is two emitter followers. One is NPN one ...
5
votes
2answers
3k views

I need help getting my computer to talk to my Arduino Uno

I've recently jumped on the Arduino bandwagon and am attempting to upload my very first sketch to my Arduino Uno installed on COM port 3. However, I get errors that another device is using COM port 3, ...
-1
votes
2answers
59 views

Where are factory default setting stored in a wireless module?

In almost all devices we find "Restore To default factory settings" option available. If factory settings are done all the data in the device is erased. So where are these factory setting details ...
3
votes
2answers
984 views

4 Digit LED Display usage

I have a 4 digit LED display that I would like to integrate into my project, but only has 12 total pins when there are 4 digits. I am a beginner so I do not know how or which pins to power in order to ...
0
votes
2answers
3k views

How to make MCLRE in CONFIG3 word work in PIC18F using MPLABX XC8

I am trying to start with PIC18 microcontrollers with a PIC18F14K50. I am using XC8 compiler and MPLABX IDE v1.2 and I have re-checked the selected device in the project configuration. For now, I am ...
1
vote
1answer
4k views

Configuration Settings of 18F4550

I have the following config values for 18F452 on my code; ...
8
votes
3answers
925 views

What does #if 0 do

Today I started to use MPLAB X to program my PICs, and found a code template, with multiple files and spots to fill in code. Before I have had a single file with my code in it. In this template, where ...
2
votes
1answer
3k views

XBee wireless module not responding any more

I bought an XBee-PRO S1 .. I built its serial explorer to be able to configure it through the PC, I’m using X-CTU to configure and test it at first it worked well,I made test/query successfully ...
9
votes
2answers
6k views

MSP430 Code Size in CCS

This should be pretty straight forward, but my google-ing is not turning anything up... I can build my project successfully in TI Code Composer Studio (CCSv5) and target my device. Now I want to ...
2
votes
3answers
1k views

Need help with hardware and software config on PIC12F675 to light up an LED

I'm trying to get an output from a PIC12F675, but I can't seem to get it to work. Here is my hardware setup that I breadboarded: And here is my code programmed using a PicKit2: ...
5
votes
2answers
3k views

What Are Lock Bits?

What are lock bits in microcontrollers used for? Are they something specific to AVRs, or used more of a general concept in microcontrollers?
1
vote
2answers
762 views

System Generator: How to configure the pins for the signals of your design?

I am programming a FPGA by System Generator. I have done this design: I don´t know what are the respectives pins of my FPGA for the blocks of my design called 'Gateway In' and 'Gateway Out'. I would ...
14
votes
6answers
3k views

Choosing Configuration Jumpers - Solder bridges, 0-ohm resistors, DIP switches, pin jumpers

I'm working on a development board, and need to let users set some configurations. It will be used by students and engineers who are trying to build circuits on a breadboard; I'm not dealing with ...
3
votes
1answer
698 views

XBee-PRO broadcast configuration

How can I configure an XBee-PRO module in broadcast mode? We are using an AT8051 controller.