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37 views

What processor architecture is in a 230GMULps KPU design?

While AI products are becoming popular recently, when looking at the "Seeed Studio Grove AI HAT for Edge Computing Artificial Intelligence Board" it mentions a RISC-V, a 230GMULps 16-bit KPU ...
0
votes
1answer
27 views

How do I charge this odd 4S Li-ion circuit?

I am trying to make a battery pack that will power my electronics. I need to make +7V and -7V. The +7V needs to have a decent amount of capacity. I have proposed a 2S6P circuit for the +7V supply with ...
0
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0answers
35 views

Low-pass filter on PDM data provides data that does not have a FFT

I'm trying to convert PDM data into analog form by passing the data through a low-pass filter in Matlab. My approach is fairly simple and matches the answer given in this Electrical Engineering Stack ...
0
votes
2answers
18 views

What's the use of the LODRV pin in the 2BQ24650 mppt batery charger circuit

I'm looking at the datasheet of the ic and I kind of understand what's going on. Apart from the typical sensing and signaling pins there are the HIDRV and LODRV pins which drive Q1 and Q2 respectively....
0
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3answers
54 views

How to connect live and neutral and earth connection in AC devices plugged into socket?

I know that when I have a fixed lamp in my house I have to use a single switch on the live wire. But when the device is connected using a plug the live wire and the neutral wire vary depending on how ...
1
vote
1answer
43 views

Using a 4-1 multiplexer

I have a 4-1 multiplexer. I am trying to learn how to use it and I understand the logic well enough, but since I have never had any electronics training, my knowledge is somewhat limited and without ...
0
votes
2answers
29 views

Two MP1584 voltage converters in parallel

I have a circuit that will need to power different loads at different voltage levels (because they are LEDs of different colors). Can I use several cheap MP1584 modules in parallel (as in: same input, ...
1
vote
2answers
46 views

Op AMP UA741 Issue

Can anyone suggest me a simple circuit to shift a 0V/5V sine wave (low freq, under 50KHz) to a sine wave -2.5V (when was 0) to +2.5 (when was +5V). I have used a circuit for shift a 0V/5V sine wave (...
3
votes
1answer
38 views

Rectifier for bike dynamo

I'm building a lighting system for a bike, powered by a dynamo (typically rated 6V, 3W max). The load will include LEDs and a bit of logic (such as N555/ATTiny85 for blinking, etc.). I also plan to ...
1
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1answer
53 views

Switched capacitor circuit

I have been trying to debug this circuit for the last week but still cant seem to find the issue. The circuit I have is shown below: This circuit was implemented based on this paper The idea of the ...
0
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1answer
50 views

Turn on batteries with MOSFET problem

Not really having any application in mind, I am playing with batteries and MOSFET. Here I want to turn on 2 batteries using a third battery. Here is the problem, when gate is HIGH, Va = 6.1v; Not the ...
0
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0answers
24 views

Package delay to Mils conversion

I was able to calculate the package delay values in pico seconds by using the IBIS models from the xilinx site. For example: For a Virtex-5 FPGA IBIS model, the package ff323_5vlx20t_ibis.pkg is ...
2
votes
3answers
180 views

What is the response current of a photodiode to an LED emitting light at different intensities?

Let's say I have one of those conventional through-hole LEDs and I'm applying a sinusoidal voltage to it. From what I understand, at a given time, the same LED is either on or off, and to virtually ...
0
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2answers
64 views

Reading PWM Signal with MCU

I'm trying to read a PWM Signal. I thought I could use a Voltage Divider and a ADC on MCU to "read" the PWM Input. My PWM Signal is a 12V (13.8V Car Board Net) 100Hz Signal with a Duty of 90%...
0
votes
1answer
69 views

LED on tactile button

I'm a beginner in Arduino. How do I wire the LED tactile button? Which of the pins of the LED tactile button is the anode and cathode of the LED and which are for the buttons? Tactile button with LED
0
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0answers
43 views

FPGA packaging and performance

I would like begin a new custom FPGA design and I am considering buying a dev kit for experimentation. When the design has finished, I intend to design a dedicated PCB board. If I change the packaging ...
0
votes
0answers
27 views

How to count number of bytes appearing in the Arduino serial?

I need to count the number of bytes appearing in the serial (UART bus) bus, how to count bytes in Arduino with Arduino Serial functions? is this possible? Application - RS485 communication with ...
3
votes
1answer
61 views

Stability of input filter in SMPS - Theoretical explanation

I read the Application note Wurth Electronics ANP008c about negative resistance of a SMPS input and how to avoid oscillation when using an input LC filter. I'm asking for a theorethical clarification ...
0
votes
1answer
41 views

What does it mean “positive” or “negative” polarity in VGA's HSynch and Vsynch?

I have been trying to study how VGA signals work and I stumbled upon this this page with all the different VGA timings. What isn't clear to me is what it means by "polarity horizontal sync pulse ...
1
vote
3answers
100 views

What actually flows, current electricity or charge?

I'm new to electricity and electronics, I started with the essentials on Sparkfun but I'm a little bit confused. On What is Electricity? under Current Electricity: Current electricity is the form of ...
2
votes
1answer
64 views

Low side current sense output waveform

I am trying to build low side current sense amplifier for my motor drive (1 kW BLDC trapezoidal control.) Before that I get confused with the current waveform of BLDC drive in low side. My application ...
0
votes
0answers
11 views

Error in the direct approach for power flow calculation

In the famous paper [teng2003direct] on direct formulation of power flow calculation for power distribution networks, there is a simplification in converting nodal current injections to line current ...
0
votes
1answer
44 views

Coupled inductors in flyback

I want to understand the following statement that describes a flyback converter when the switch is turned off : " When the PWM controller instructs the power switch to turn off, the voltage ...
0
votes
1answer
24 views

Eliminate transient loss of power due to inverter (UPS) transfer time

I have a 120V AV receiver (amplifier) connected to a step down transformer for converting from 230V mains. This is the only electronic equipment in my home to completely lose power and turn off/on ...
1
vote
1answer
100 views

Understanding XLR phantom power adaptor

It's a scheme for microphone adapter, from XLR to mini-jack, with the conversion of 48V phantom power to plug-in power 6.2V. Could you describe how the circuit works?
4
votes
2answers
286 views

Choosing a power transistor with low dissipation

I need some advice about how to provide a DC voltage (between 0 and 24V, tunable) with high current (about 8A) to a motor. All the times I have done this, I have used a BJT Darlington pair like this ...
1
vote
0answers
39 views

How did the arithmetic organ in ENIAC?

I have been reading the book of Goldstine on computers and I was wondering how ENIAC could activate a computation using numbers (the antecedent of the stored program concept). Goldstine wrote that ...
6
votes
5answers
720 views

What is the best way to convert a 10V power supply into a 5V power supply?

If you were given a 10V power supply and wanted to power USB devices with it, how would you convert it to 5V? Would using a voltage divider splitting it into 2 5V lines be the best? What ohm resistors ...
0
votes
0answers
23 views

Calculate average current draw for instantaneous loads

I have a battery powered project with the following statistics: sleep current: 1.5uA activity A: 500uA average in 10ms interval (peak current is 1mA) activity B: 1.2mA average in 20ms interval (peak ...
10
votes
4answers
687 views

Does a battery's ability to supply high current mainly depend on its internal resistance?

I was posed the question of whether or not you would be able to start a car with 8 small 1.5V batteries in series (thereby creating the required 12V most cars run on). I immediately answered "no&...
0
votes
0answers
10 views

Package Delay values from IBIS models

I need package delay values for the package XC7Z020CLG484. I downloaded IBIS models from the xilinx website. The file under name "zynq.ibs" has the following values for the package ...
2
votes
1answer
273 views

Unexpected and strange MOSFET behavior

Va is 10 V, M1 is OFF; Vc and Vd are both 95 mV and M3 and M4 are ON. Good, that is that expected, but why M2 is ON here? The gate of M2 is grounded. Vb measures 735 mV, which is strange! Here, I ...
1
vote
1answer
42 views

CMSIS DSP Library and RMS

I'm using a STM32 Cortex M0+ controller which does not have FPU. I'm reading 50/60Hz sine wave and I would like to calculate the RMS using the DSP library: keil.com/pack/doc/CMSIS/DSP/html/group__RMS....
-6
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0answers
72 views

A really easy question from my robotics class [closed]

Light 2 LED in parallel with 2 LED using a breadboard, power supply and a 470 resistor. Anyone have any idea how to draw it?
1
vote
0answers
28 views

Wiring an automatic solar light for a tiny library

I want to add a light that comes on when you open the door to my tiny library that's powered by a small solar panel. I'm no electrical expert but I do know basics enough to make simple circuits. My ...
1
vote
1answer
20 views

Rload in half wave rectifier

Does Rload play a huge role in a half wave rectifier?, why when I change the value of Rl the output of the half-wave rectifier graph changes?
0
votes
0answers
18 views

Can I run a charger and inverter in parallel on solar?

Currently I have about 4.5kw in solar running to an inverter. The inverter is energy saving only, so when the grid goes out (it does frequently) I have no power. I just want to keep some basic ...
0
votes
1answer
62 views

Is there any special reason behind the formula of radix complements? My concern is with whether memorizing the formula is the only way to remember it

I am recently studying the concepts of diminished radix complement and radix complement. This is a simple question. I am aware of the formulas. I just want to know if there is a special reasoning ...
4
votes
2answers
109 views

Diode stack circuit

The question is for this circuit is, explain why some values for Rload, make voltage regulation worse? Rsrc = 470 ohms, diode is a 1N914, Vsrc = 3, 4 , 5 volts for 3 different resistor load values ...
0
votes
2answers
51 views

Is there a current sense coil inside this ELCB?

Is there a current differential sense coil inside this ELCB (Earth Leakage Circuit Breaker) just like GFCI or RCD? I took it from a unit and I dont want to break it apart to peek I cant find any ...
0
votes
0answers
65 views

What is this SMD component? (Fuse?)

This part with a "B1" on it is in series between a FET and it's load, I'm trying to figure out what it is. This is on a e-bike display that should get up to 85v. While I don't know if it is ...
2
votes
0answers
22 views

How do bluetooth headsets handle 2C charging current?

I have used a few of those bluetooth headsets that are wireless stereo (TWS) ones and are charged by a case in which you insert them. I haven't used expensive ones, just rebranded chinese ones. All of ...
1
vote
1answer
56 views

Parallel MOSFETs in saturation/active region

Am I right that when MOSFETs are connected in parallel for them to share the current equally (See Parallel MOSFETs) they have to be operated in the triode region? I have an electronic load with 3 ...
0
votes
1answer
38 views

Verilog/System Verilog restrictions on generate block and continous assignment

I took the carry look-ahead code from link and modified it to be wrong. The part I modified are ...
1
vote
0answers
5 views

Why does CST give “Error in field monitor calculation” after I change the frequency of the simulation?

I'm using Integral Equation Solver (IES) in CST (Computer Simulation Technology). I have one E and one H field monitor that are each 100cm^2. The simulation runs well at 100GHz, but when I up the ...
1
vote
0answers
34 views

PIN Diode Switching

I am using a Skyworks APD0505-000 PIN Diode as a switch for a bank of capacitors for my oscillator circuit at 4-6GHz. I use the Shunt SPST Switch configuration from the manual, but I can't get the ...
0
votes
0answers
42 views

Mezzanine board connector recommendation

I plan to develop a mezzanine PCB intended to sit in place of two ICs in an existing circuit and replace their function. Height is limited as the device is only 1U high in total. One of the original ...
0
votes
1answer
15 views

LTE, downlink multiple antenna channel estimation with and without Channel State Information (CSI)

In an LTE downlink with CSI at the transmitter, is the radio Tx in the base station and Rx at the user end hardware part of the channel estimation? example: Tx to Tx and Rx to Rx isolation between ...
-1
votes
1answer
43 views

Why an RF choke is necessary?

Here is a common source amplifier with L as an RF choke. The purpose of the RF choke is to block RF signals and passes only DC signals. I have four questions. (1) At which nodes do the RF signals ...
0
votes
0answers
24 views

BMG250: Understanding basic gyroscope output?

I've never used a gyroscope before. I chose Bosch BMG250 from the digikey search results. I was reading the datasheet and other info online on how a gyroscope works and I'm a bit lost. The output of ...

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