0
votes
0answers
8 views

FTDI (FT232RL) powers itself through RX/TX lines

I have an FT232RL connected to an AVR Atmega2184P (running the Arduino core) UART. The microcontroller has two power supplies - a LiPo battery (VBat), and USB power (Vin). The way I've designed the ...
0
votes
0answers
5 views

Smart Battery Charger with BQ24450

I am a newbie and need help in designing a smart battery charger with BQ24550 here are some details mentioned. Battery pack has 4 Lead Acid batteries (Panasonic LC-R064R5P) 6V 4.5Ah connected in ...
0
votes
1answer
10 views

4518 and Arduino

First off, disclaimer; I'm a computer scientist in the progress of my first baby steps in electronics. I'm trying to hookup a 7segment with a 4511, 4518 and an Arduino. The 45-series chips and the ...
0
votes
0answers
10 views

Will a Delta to Wye transformer cause a huge loss to Generator output voltage?

I'm planning to convert my three phase supply to a single phase supply. To achieve this I'm planning to use a delta to wye transformer. My major concern would be, will the generator output voltage ...
0
votes
0answers
3 views

H-Bridge vs Mechanical Speed Controller

What's the difference and trade-offs between a h-bridge motor controller and a mechanical speed controller for controlling a brushed motor in an RC car? I have a cheap RC car that I'm trying to ...
-1
votes
0answers
8 views

Troubleshooting Laptop [on hold]

First I would like to say I'm not terribly sure if this is the right place to ask this question, but it is probably the most applicable place to ask. I have a Toshiba from early 2011 (Toshiba ...
0
votes
0answers
8 views

Why Does My PMG Generator gets Locked Up?

I tired to connect a 60 W 240 V resistive load to a 1000 W generator which was running at 200 V immediately after the load was connected the voltage drops to 60 V and the generator stops spinning. By ...
-1
votes
0answers
13 views

24V DC TO 180V DC CONVERTER

Can anyone help me to design a boost converter which can make 180v dc from 24v dc.It is a part of my project to connect from a battery(say 700Ah, 24V) to inverter (3kW,160-550v). Thanks ,
0
votes
0answers
7 views

Digital Output Control over ECU discrete inputs

I am looking for a better solution or method for controlling the discrete inputs to an ECU using a simulator and signal conditioning. The discrete input signals from the ECU provide an output of 15V ...
1
vote
2answers
21 views

Measure speed of slot car

If I have some cars going around a track and I want to measure their speed if I put two IR sensors up at a fixed distances can I accurately calculate the speed the cars are moving using an Arduino?
0
votes
1answer
31 views

80486 motherboard designing

This was an option for my school project but I did not chose it, however someone could have. The goal was to develop a motherboard for Intel 80486DX4, using modern parts and design principals, and ...
1
vote
0answers
35 views

Help with schematic

I made a schematic with an ATmega 328, a LT1763, and a HC-05 module. I was wondering if I made any mistakes on the schematic. It also has a 4 pin female header for a MPU-6050 module. It might end up ...
0
votes
1answer
34 views

Copper weight/thickness current capacity

i have been reading about how Copper weight/thickness is important in several areas of PCB design. The thickness and width of a trace determines the amount of current (amps) the trace can carry. The ...
1
vote
2answers
60 views

forward or reversed biased?

Is it reverse or forward bias? in real life and theoretical for example: Voltages in the pic are 10V What if I placed a resistor in series with the source on the right?
-5
votes
1answer
35 views

What would be the best microcontroller for running PID calculations? [on hold]

I need a microcontroller for my line following robot. Which one would be the best considering a price below $30 and preferably >120MHz clock?
0
votes
1answer
34 views

Opamp: amplifying DC bias problem in output?

OpAmp beginner here. I'm trying to do the simple 1KHz, 1V p-p sine wave amplification circuit using TL071 or similar OpAmp. Simulation currently in LTSpice. I've biased the VCC to half to try to ...
1
vote
4answers
94 views

PCB Tinning to increase current

How can i design a PCB in order for it to have this kind of PCB Tinning finish? i do know this decreases the resistance of the tracks and increases the amount of current it can handle however Do i ...
1
vote
1answer
26 views

Why does timing change in dataframe using Manchester encoding

I have successfully received a couple data frames from an RF transmitter. I compared couple consecutive frames and the timing deviation between them is marginal, so I am convinced it is reasonably ...
0
votes
1answer
15 views

uC Datalogger to GUI for dataprocessing

So I looked around electronics.stackexchange for this one and here is where I landed: What type of USB Protocol for Datalogger Basically, I would like to sample a voltage (specifically, from a photo ...
-1
votes
0answers
17 views

Sensitivity of induction coil senors

I am using geophysical equipment, magnetometers with induction coil sensors. From time series (mV), after Fourier transform coefficients are calculated, the next step shoud be multiplication with ...
0
votes
0answers
33 views

Controlling Arduino from Raspberry Pi [migrated]

I am trying to simply send a digital output from the Raspberry Pi to trigger some code on an Arduino. I have setup the Pi with the digital output working fine (tested using LED) however, I cant seem ...
4
votes
2answers
213 views

Gold coated pads

Is there any difference between a gold coated pad and a gold pad? I have been ordering boards from OSH park, they are really good quality, I'm just wondering what benefits this has over silver or bare ...
7
votes
6answers
345 views

For embedded code, why should I use “uint_t” types instead of “unsigned int”?

I am writing an application in c for an STM32F105, using gcc. In the past (with simpler projects), I have always defined variables as char, ...
0
votes
0answers
21 views

Altium Designer Errors - Minimum Annular Rings

How can i solve this error? Minimum Annular Ring (Minimum=0.225mm) (((ObjectKind = 'Pad') OR (ObjectKind = 'Via')) And (Layer = 'MultiLayer') And (HoleDiameter <= AsMM(0.45)))
0
votes
2answers
49 views

Circuit Requirements for a 30 min continuous on off cycle

I would like to build a circuit (preferably using components from old common electronics like a VCR or whatever) that continuously cycles on/off in ~ 30 min intervals. Input voltage is from a 12v ...
0
votes
1answer
34 views

Limit drawn current but not voltage (LED driver for 100W LED)

So I have serial connected 8 LiPo's with corresponding controllers to monitor the battery pack. Now, they deliver 32 volts which is precisely what I need but they deliver way to much amperage compared ...
0
votes
2answers
60 views

Circuit to Detect State of Output Pin

I am trying to implement a circuit using mosfets that will detect the state of a pin with 2 outputs. The input (I) to output (O) relationship I want is this:
0
votes
0answers
25 views

Open-source Netlist

I am looking for a site (or a kind reader) that provides open-source netlists that contain constraints with mathematical expressions (such as Delay). I need the mathematical expressions as well as the ...
0
votes
0answers
20 views

How to feed signal from an LNB to your PC?

I'm working on a project in which I am required to analyse signals from a LNB. I want the signals to be on my computer via USB or any other thing. Can anyone suggest me what to do?
0
votes
2answers
63 views

How does water damages the phone lines?

Today, we just replaced the phone line which was damaged due to moisture and were causing a great deal of disturbance and noise in the phone. What exactly causes this noise? Does the signals gets ...
-2
votes
1answer
57 views

Current In A Circuit

When a battery ,by performing work on a charge, moves it to the higher potential,why doesn't the charge move through the battery and return to the low potential,why does it go through the circuit?
0
votes
0answers
16 views

Variable Reluctance Sensor Type

I am trying to inpret the signal from a crankshaft speed sensor. The sensor is a variable reluctance sensor. There are two wires running to this sensor and the waveforms (when viewed through an ...
-4
votes
0answers
21 views

Can I share a single power adapter between multiple systems with different requirements? [on hold]

I have multiple video game consoles all hooked up in the same space, each one of them with distinct power specifications. The AC adapters for those systems end up taking a huge amount of space ...
1
vote
4answers
145 views

PCB Layout, Functional vs Actual Pin Order

I'd like to continue this conversation here: CAD Schematic pin arrangement approach Basically, there are 2 major ways to do schematic symbols, either with true pin order or by grouping pins by their ...
-4
votes
0answers
28 views

What does UE stand for in LTE network?

I have faced to several articles about LTE networks, which have used from the word UE, but they have not defined it. I have surfed the Internet, but there was not any clue for that (or I did not find ...
0
votes
1answer
31 views

Meaning of TLC59281 LED supply voltage rating

TL;DR: Does the max VO of 17V refer to the LED supply voltage or only to what's left after the diode drops? TI's TLC59281 is more or less a device that combines two 74HC595-like shift registers with ...
0
votes
0answers
23 views

Schematic for run of the mill SRAM?

So lets take your run of the mill SRAM, such as 23K256 from Microchip: http://ww1.microchip.com/downloads/en/DeviceDoc/22100D.pdf Do they mostly just use a generic 6T cell setup such as: ...
0
votes
0answers
18 views

hot swap controller for a centralized system

Hot Swap controllers allow electronic circuit boards and cards to be inserted into live system backplanes, eliminating the need to power them down. My question is if i have a centralized processor ...
0
votes
0answers
24 views

RT8298 oscillations in output

I am using the RT8298 dc dc from Richtek. I find an anomaly in the behavior of the chip. When the input is a max of 11V the o/p is smooth dc level of 5V. When it is greater than 11V there are severe ...
-1
votes
0answers
14 views

Sitara AM4x based Board [on hold]

I'm looking for a board which is based on Sitara AM4x SoC.I tried to search it on Google but I could not find any board which is based on AM4X. Though I do see Begal Bone x15 based on AM5X but that ...
1
vote
1answer
30 views

Handling variable length commands with pauses in transmission

I have my embedded system and I send many different commands to it using PC via RS232. The issue is that each of command consists of different amount of bytes. What is more there is possibility that ...
-1
votes
0answers
14 views

Why 1000 CCD Barcode Contact Scanner can't recognize zero? [migrated]

I have a barcode scanner, named: 1000 CCD Barcode Contact Scanner I have downloaded the USB driver and the Scanner Manager from CipherLab, but I cant get it work. It works well on windows 7 but ...
-2
votes
1answer
51 views

Get status of syringe without power supply [on hold]

I have to build a "usage status indicator" for a syringe. Conditions are as follow. 1. if syringe is used for 3 times, it should show some indication. 2. if syringe is used less than 3 times, it ...
4
votes
3answers
488 views

What is a DC DC controller?

I have heard about DC DC converters and I understand what they are but what is a DC DC controller? What is the difference between the two? Like this LM5085, I cannot understand the major difference ...
0
votes
2answers
32 views

How to run ATmega328P-PU using 3.7v Lipo 600mAh?

I want to run bare ATmega328P-PU using 3.7v 600mAh Lipo Battery. The Lipo is used to run Nano Quadcopter. The discharge rate is 20C. My Question is: 1. Will connecting Lipo to my atmega directly fry ...
0
votes
1answer
57 views

3 Logic Level Transistor or MOSFET [on hold]

I am looking for a MOSFET or transistor which get fully activated with a pwm signal of 3.3v. I also want to know that can it pass about 1.5 A current. I require it for a nano quadcopter application. ...
0
votes
1answer
22 views

Reading GPIO on TM4C123G board

With the TM4C123G board, I'm using Code Composer Studio v6. I want to read the GPIO pins that are connected to the user switches on the board (Pin F4 and Pin F0). The code at first did not work but ...
0
votes
1answer
54 views

RGB LED audio spectrum analyzer - Bandpass or FFT?

I'm about to build a coffee table which has a RGB LED matrix build in it just like in this video. https://www.youtube.com/watch?v=4NJDgvV8RZw I want the matrix to display an audio spectrum that ...
0
votes
0answers
18 views

Dual Analog Hall Effect Sensor to Digital Conversion

I already have a Dual Analog Hall Effect Sensor with 4 pins (VCC, GND, Output1, Output2) and i would like to convert the output into digital and if possible Speed and Direction outputs like this chip ...
0
votes
0answers
16 views

Zynq 7020 system generator start up problem

I have recently started using Xilinx system generator for simulating dvb communications system. Matlab 2014b and Vivado 2014.4 were installed and everything was running smoothly with no problem. At ...

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