All Questions

1
vote
0answers
66 views

The relation between Fourier Transform and Discrete Fourier Transform [on hold]

I wanted to know the relation between FT and DFT
1
vote
0answers
43 views

How to specify in the project or firmware of the application, where to start writing the code?

I have a bootloader to PIC18F4550 that was written using Mikro C for PIC and I have two firmware applications, one was written using Mikro C for PIC and the other using MPLAB X with XC8 compiler. With ...
2
votes
0answers
31 views

How to include paths for the C compiler in atmel studio?

I have a folder project and it consists of multiple folder and .c and .h files what is the best way to include them all without including the individual folders?
0
votes
0answers
22 views

detect multiple objects on the same line? [on hold]

I'm wondering if it possible in some way to detect more than one object where the detector and all objects are on the same line?
0
votes
0answers
22 views

GPS Fix but Pulse-per-Second Inop? [on hold]

I'm using a UBlox MAX-M8Q interfacing with an XSens MTi-7 Inertial Measurement Unit. Antenna is a Tallysman 33-2920, which I believe has a slightly higher noise figure than is spec for the MAX-M8Q. ...
0
votes
0answers
13 views

Nidec gamma32 4pin pinout

I have Nidec Gamma32 D12F-24BS4 15BH2 blowing fan cooler. It has very strange coloring for wires: red-white-black-yellow. Probably two of wires are GND and +24v ...
0
votes
0answers
22 views

Which sector of flash to store “user configuration” bytes in? STM32F303K8

I'm working on a project in which I'd like to store about 10 "configuration" bytes somewhere in flash, as I'd like to have the same firmware run on different boards with different settings. It doesn't ...
-2
votes
0answers
37 views

connecting power resistor to arduino as a heater? [on hold]

how do I connect power resistor to a Arduino. it take 15V to reach the temperature I want and I have to maintain the temperature.
0
votes
1answer
35 views

Wire gauge and combined wires for 3D printer hotend through PCB

So I've been designing a wiring harness PCB for my 3D printer to provide connections and easily swappable tools. I settled on a TE 34-pin connector to use as input on the PCB. The current design ...
3
votes
3answers
188 views

Why aren't non-isolated DC-DC converters made for high wattage applications?

I am new to electronics. I am presently studying DC to DC converters. One thing I noticed is that most of the people are using isolated stepdown converters like half bridge, full bridge, or resonant ...
1
vote
1answer
125 views

Are there PCB connectors capable of suporting more than 3.5kV of working voltage?

I was thinking of a design for bringing VCC+ and GND to a board through a PCB connector. VCC = 6 kV. It comes from external source towards a banana jack within a metal case. The first idea was to fit ...
1
vote
0answers
29 views

Wiring high voltage transformers in parallel

I have 2 high voltage transformers from microwave ovens , both transformers are exactly the same.I need to wire them in parallel can anybody tell me how to do it?
0
votes
1answer
31 views

PIC24FJ Baud Rate Issues / Crystal Selection

I'm using a PIC24FJ1024GA606 and I'm using the internal Fast RC Oscillator. Here is my config: ...
1
vote
0answers
21 views

How to achieve Ultra Low Power BLE Advertisment under 20uA? [on hold]

I have a base board that uses a ESP32 to scan for BLE devices. I also have a door sensor connected to a reed switch, what starts advertising whenever the door opens. I currently use a JDY-10 in ...
0
votes
1answer
36 views

Voltage regulator STBY & OFF - whats the difference?

I am looking at MAX883 voltage regulator and from the documentation is not very clear whats the difference. It says this about pin OFF: In this mode, the pass transistor, control circuit, ...
0
votes
1answer
50 views

Test cases for for OTA in LTSpice

Here is a component OTA provided by LTSpice which has inverting non inverting common and output node. I am in process of modelling this OTA behavior form LTSpice to PSpice. I reffered this link for ...
0
votes
1answer
18 views

CAN transceiver Vref connection

I am using the TI SN65HVD230DR CAN transceiver on two separate CAN buses between three microcontrollers (MCUs) -- two are on the same board, and one is off-board. This transceiver includes a Vref pin:...
0
votes
5answers
141 views

Do Computer keyboards have ICs?

I have always assumed that computer keyboards do not, in the typical case, contain integrated circuits. And also, now that I think about it, there must be a set of standard electrical (digital?) ...
0
votes
0answers
20 views

Arduino Laser Engraver(450 nm / 500mW) using Arduino Uno + CNC Shield + a4988 driver…without (PWM/TTL) board [on hold]

I am absolutely new in this field so i am a complete novice....... But I would be highly obliged if i can receive some info regarding CNC Laser Engraver on the problem that i am currently facing........
0
votes
3answers
49 views

Terminology confusion with sensitivity used with gain

Regarding force transducers like strain gauges, the resolution is the smallest change in the load that represents a change in the output values of the measured forces and moments. The smaller the ...
0
votes
0answers
26 views

How to use analog switch to create a USB switch [on hold]

I have 2 PCs with one monitor, I want to sometimes switch from one to another, the only things are the keyboard and mouse, i have to have 2 keyboards and 2 mouses for two computer. I want to have a ...
0
votes
0answers
15 views

How to send commands to HP33120A through RS232 using pyVisa or terminal? [on hold]

I read this topic: How to use SCPI on HP33120A via RS232? And I have almost the same problem, but in my case I just want to send frequencies (only sending stuff) and I'm using this FTDI to USB ...
2
votes
1answer
35 views

Quarter-wave impedance transformer working principle

consider the following scheme: A transmission line of length lambda/4 has been put before the load ZL in order to get an impedance matching. But, I do not understand how it works. Precisely, by the ...
-8
votes
0answers
46 views

Please suggest me OP-AMP circuit [on hold]

I am connecting a PAM8403 with 2x 3W 4Ohms speakers but the output sound is low. I am connecting power supply for 8403 from raspberry pi GPIO pin and it's input to 3.5mm jack. So I need to know about ...
1
vote
2answers
92 views

Step down converter PCB

Is one side of R050 connected to OUT- ? To nut for the acrylic housing would bridge the little gap there - is that a problem? Thx.
-1
votes
0answers
34 views

capturing data from oscilloscope Tektronix TDS1012 [on hold]

I'm pretty new with oscilloscopes and I'm trying to get data from mine to a csv file for example. I saw several approaches like using an usb (not supported on my model), communication models (which I ...
0
votes
2answers
52 views

How do I work out spec of 24v dc motor?

I have a motor in a vending machine (picture) it only has these numbers on. What I'm hoping to do is turn the motor on and off. However I have no idea what this motor is aside from 24v dc. How do I ...
-4
votes
0answers
26 views

how do I test optocouplers (H11L1, PC900, 6N138) to check if the IC wasn't broken? [on hold]

Believe it or not, my question here to receive MIDI using H11L1 and here to receive MIDI using Arduino correctly did not solve my problem, because I still stuck with the optocouplers. Maybe they are ...
2
votes
2answers
91 views

Homemade Li-ion charger

I am trying to build a lithium battery charger (Li-Ion) for charging banks of 6s batteries of varying capacities (2-30Ah) from a varied DC input. Given that I need to supply CC/CV to charge these ...
0
votes
0answers
45 views

What is (was) this component at ZD102 (top left, next to powered serial connector)

Part at ZD102 is overloaded with too much current and blown. It's three legged, with two legs on the south side and 1 on the top. The left side (white in the picture) is blown and has since ...
0
votes
1answer
46 views

Problems with understanding memory map STM32F446RE

I have a problem with the understanding of the memory map of the STM32F446RE. In the datasheet is the system memory (0x1FFF0000 - 0x1FFF7A0F) 30kb big. But in the AN2606 the system memory is only ...
0
votes
1answer
38 views

Intel FPGA equivalents of Xilinx IBUFDS Primitives?

Im trying to migrate an Design from using Xilinx primitives to Intel Altera FPGA. The original design uses the IBUFDS for the clock signals. ...
0
votes
0answers
11 views

even-mode to odd-mode impedance ratio for balun

How do we see from the following expressions that LARGE even-mode to odd-mode impedance ratio is very important for balun ? How to derive the two expressions involving Ya, Yb, Zoe,Zoo ?
0
votes
0answers
17 views

Indicating “image not displayed” from downstream via DP/HDMI/DVI

I'm trying to switch a video signal between different sources and, as a courtesy to the device generating the signal, would like to indicate that the image data is currently being thrown away so it ...
2
votes
1answer
49 views

How can be creepage between two conductor points be determined for HV pcb design?

I have read about spacing at HV design and it seems to say that there are two main standards to be followed: IPC or UL (IEC). IPC is a generic and commonly used. But UL is the best option for designs ...
0
votes
0answers
48 views

Build In Self Test LCD

I've recently been trying to get a custom LCD (ET101005DSAK0) connected to an Embedded System on Module however without any success. When debugging why the LCD is not working I wanted to make use of ...
0
votes
1answer
37 views

How to connect voltage protection relay to contactor?

Could you help me connect a voltage protection relay (VPR) to a contactor? I'm not sure how to connect the relay output terminals (NO, NC, COM, etc.) to contactor control terminals A1 and A2 in the ...
0
votes
1answer
36 views

Wheatstone bridge and difference op-amp

I use Wheatstone bridge as a dual voltage divider to feed both inverting and non-inverting inputs of differential op-amp: Theoretically voltage can be calculated using voltage divider expression: Va =...
3
votes
1answer
33 views

Connecting luma only output to composite input

In the course of troubleshooting this problem I reconnected RCA connector connected to the RCA input of my TV to the luma wire of AD725 in hope having precise and beautiful grayscale picture, but got ...
0
votes
0answers
21 views

ASF SAMD21G18 2x timers usage

im trying to use ASF to schedule repeated tasks. using TC4 and TC5: in atmel start both using generic clock generator 0 (48MHz). both are HAL:DRIVER:Timer driver init.c is generated automatically ...
0
votes
1answer
36 views

What is the notion of sub-IP?

all I am CS engineer, mainly dealing with massive IP(Intellectual Property) data using Helix Perforce. Hence, sometimes I have faced with difficulties about semiconductor jargon. What is "Sub-IP"? ...
-1
votes
2answers
58 views

how to find GSM service level of a IP-connection?

I am using a GSM modem to send data to a remote server over TCP/IP connection. I am using STM32F103 for the software. I want to connect 3 LED's with the 'F103 to indicate which connectivity and ...
1
vote
1answer
70 views

For-Loop and repeat synthesis

We all know that the For-loop and Repeat are synthesizable, they get converted to blocks, for example: ...
0
votes
0answers
24 views

HDLC with Microcontroller [on hold]

I want to communicate a Microcontroller with a third party embedded card communicating over HDLC. Preferably I want to achieve this using AVR or Arduino. The HDLC channel consists of a data and clock ...
0
votes
2answers
33 views

How to import PCB 3D model (step file) designed in MCAD software in Altium and place PCB footprints, and route it?

I have my PCB board from Mechanical Design software as a Step file. Now, I want to import it into Altium Designer and place PCB footprints, and do the routing etc. I am looking for some guidelines or ...
0
votes
1answer
33 views

How to implement ion acceleration and deceleration in stepper motor?

Actually, I am using pic microcontroller and software uses for programming is microC. One more thing I use a controller unit (DH542-D)for controlling bipolar stepper motor. I did read several articles ...
0
votes
1answer
42 views

How does a negative power factor look when it is graphed?

How does a negative power factor look when it is graphed? How will this impact apparent power versus true power versus reactive power? And how do we interpret this as per power dissipated versus power ...
-1
votes
0answers
26 views

how to write data into thumbdrive (pendrive) using USB host controllers like FTDI viniculum and MAX3421E [on hold]

i am intrested in integrating USB in my project so my problem is if i use USB host controller IC's i am able to read the thumbdrive but i want write into it.but i did not seen any such IC's. Is there ...
0
votes
2answers
34 views

Contact on substrate of a MOSFET

Why do we want to have an ohmic contact on a substrate terminal of mosfet? What would happen if we used schottky contact instead?
0
votes
0answers
38 views

What will be vo/i for given circuit?

Solve using both approaches first using small signal analysis and then using feedback analysis.

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