Questions tagged [module]

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Extracting camera module [closed]

Please read firt and don't flag duplicate. I want to extract a back camera module from an old vivo y71, so that I can use it in raspi or something. I don't want it to be on 24 hours like an cctv ...
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2 answers
61 views

Explanation of Analog Input Module

I'm trying to wire this module. I'm just confused as to what the difference is between the two triangles and how would I connect them?
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1 answer
31 views

How to interface two Raspberry Pi CM4 modules and a SOM CN9130 module

I am working on project that requires two Raspberry Pi CM4 modules and a SOM CN9130 module to communicate each other with a data speed of 1GBPS. Both modules have Ethernet and support the PCIe bus. ...
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1 vote
1 answer
43 views

SD card module with ESP32

I'm using an SD card module with ESP32. My plan is to store configurations such as SSID and passwords. I tried the function with a text file which contains the text "Hello" and for ...
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1 answer
57 views

Creating product to be sold to public using prebuilt modules

Is it ok for me to combine multiple prebuilt modules, put them into casing and sell them to public? such as (accelerometer) https://core-electronics.com.au/adxl335-triple-axis-accelerometer-gy-61.html ...
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-2 votes
1 answer
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TP4056 charger module - Can we change the "Preset 4.2 V Charge Voltage" to 4.0 V?

I am using a TP4056 charger module to charge a 2000 mAh lithium-ion cell (18650). The source voltage is from a solar panel that generates a maximum voltage of 4.0 V. The TP4056 charging module is not ...
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0 answers
31 views

How to turn on a module with a pulse

I have some issue turning on the module Quectel BG600-ML3. Here are the instructions given in the data sheet : The PWRKEY must be taken high for 500-1000ms. I can only affect the MCU_PWRKEY (Turn on ...
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1 answer
131 views

Anyone having a GSM module please confirm. Is it normal to have the terminals of SIM800L EVB antenna shorted?

My SIM800L-EVB GSM module wasn't registering to network even after providing good power supplies. On troubleshooting I found that the terminals A and B, to which the antenna attaches(see img attached) ...
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1 answer
145 views

design an embedded system with ac6905a bluetooth IC [closed]

I am a beginner in designing electronic boards and PCBs. I want to design a board, somehow, this board should be able to receive surround sound through a microphone and send it via a Bluetooth IC. The ...
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-2 votes
1 answer
314 views

Xl4015 5A for 2s 18650 as charger

I have a xl4015 5A with only voltage adjuster. Can I use it for charging 2 series and 2 parallel 18650 cells? I saw a circuit diagram but in that diagram the xl4015 has variable current adjuster. It ...
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2 answers
63 views

NB-IoT module - Connect ANT pin directly to RF connector without matching circuit?

Some months ago I did the layout of a board with a GSM module SIM800L and below is shown the antenna circuit that was used. We assembled 200 PCBs with R22 = 0R jumper and C28 and C29 not populated and ...
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1 answer
61 views

Data Sheet help: Current flowing through a MOSFET module

In a MOSFET module, when looking at the data sheet can I assume the current through each MOSFET device is the given Id, or is Id the current moving through the entire MOSFET module? For the data sheet ...
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1 answer
387 views

How to import modules in eagle schematic files into kicad correctly and how to create similar eagle module in kicad?

I have just started learning kicad and schematic design. I am trying to import MKR 1500 arduino eagle files to kicad. I am able to load all the schematic symbols except shifter1. My import procedure: ...
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1 answer
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On the LM386 opamp Module, why I am getting an output without giving input

I am using an LM386 opamp Module from Amazon. I am powering it with a 5V input (just to power it, not intending to amplify anything at this point). Nevertheless a multimeter measures an amplified ...
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2 answers
65 views

Do DIN rail mount interface relay modules with a "spare" terminal exist?

I'm currently designing an industrial control panel that I'd like to be as compact as possible, and was looking at interface relays, and was hoping to find a specific feature, but now I'm not sure it ...
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1 answer
389 views

Can anyone explain how this 433MHz RF transmitter module works?

I don't know the basic functionality of the circuit and I need a complete description of every component.
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0 answers
33 views

What is the required ground size for the S2LP RF module?

I'm designing a four layer board with an RC-S2LP-868-HA RF module which has a little helical antenna. I have two question about that. First, how do I calculate the required ground size for the RF ...
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How do I prepare my SIM card for SIM800L GPRS GSM module?

Im trying to send a SMS message using the SIM800L GPRS GSM module. I know this might sound stupid but, do I need to load my SIM first before it can send SMS message? If possible, can I just pay after ...
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1 vote
0 answers
55 views

High voltage booster with continuous output?

I need a module that can take a DC voltage of 2V - 12V continuously as its input and produce atleast 2KV DC continuously as its output. I've come across high voltage generator boost modules but they ...
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5 votes
4 answers
702 views

Why does the Tesla battery module capacity not work out in calculation?

https://www.evwest.com/catalog/product_info.php?products_id=463 I am referring to the Tesla battery module listed in the above link. It says a single cell has the following specs: Nominal Voltage = 3....
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2 votes
1 answer
391 views

Can't get 2-relay module to work through JD-Vcc

I bought this 2-relay module: https://www.amazon.de/gp/product/B00E0NTPP4/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 I'm testing it out using a 5v 1 amp power supply. If the JD-Vcc jumper is ...
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1 vote
1 answer
112 views

Did I buy a broken RF module? [closed]

I am having trouble with a RF relay module that I bought off eBay, which I am using to control a 30A automotive relay to turn a 12V 20A trolling motor on/off. I’ve attached my circuit diagram below. ...
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1 vote
2 answers
449 views

How to convert Li-ion battery voltage to 1.5 V?

I want to use Li-ion batteries to power devices that work with AA (1.5 V) batteries, to have best autonomy and to be able to recharge it easily (using a battery manager module). I had thought of a ...
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-1 votes
1 answer
52 views

Looking for a validating bill module [closed]

My team and I are working on a project which deals with money management. Basically we need a module that could count and verify the authenticity of bundles of bills. For the moment, we only found ...
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0 votes
0 answers
111 views

Ch376 USB Module with SPI

What is the problem here, I used logic analyser to check the data and commands i send to the Ch376 USB Module, And all are right, But the module is not responding with any reply, Just return back the ...
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-1 votes
3 answers
176 views

Any modules which can measure the distance between two modules even through obstacles?

This is for a social distance enforcing project for school. I want to know the distance between Module 1 and Module 2, where each module is worn by a person. Usually ultrasound would be used, but I ...
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1 answer
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Question regarding chinese voltmeter ammeter module

I am new to this forum. I am a Diploma in Electronics from India and a passionate DIY hobbyist too. I have a question regarding cheap 10 amp ammeter and a voltmeter module I bought off aliexpress. I ...
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10 votes
1 answer
821 views

What to check for when buying an electronic component or module

This has been raised as a canonical Q and A for future reference How can I acquire electronic parts/items/modules and ensure that there is minimal risk of them being unsuitable for my project or ...
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0 votes
1 answer
466 views

Conditional Port connectivity during module /wrapper instantiation

I have a wrapper, with multiple ports (mainly used to parameterize/scale a particular module) and in this wrapper i parameterize the module instantiation with help of generate for-loop. i.e. ...
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2 votes
1 answer
93 views

Help me to identify this crystal oscillator module

Please help me to identify the manufacturer of this crystal oscillator module so that I can search for its datasheet.
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1 vote
1 answer
50 views

Integrating an Altair module with an Arduino

As a disclaimer, I have experience with Arduinos and Raspberry Pis, but I know embarrassingly little about electrical engineering and anything beyond the basics. Most of my previous projects consisted ...
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0 votes
3 answers
359 views

Calculate resistor value of Optocoupler & Transistor

I have a problem working out the values for the resistors R1 & R2 of a relay module. Right now, I use R1 = 1k & R2 = 560 Ohm, but that is not working. What resistor values should I use? And ...
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0 answers
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Accessing SMT pins on prototype board

I need to be able to solder wires to the hidden pins of an smt ic. The ic is soldered directly to the pcb, and they are not visible. I need to access the PCM audio interface on a sim7500e, and the ...
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1 vote
0 answers
608 views

Unable to program and debug ST BlueNRG-M2SA Bluetooth module

I would like to ask you for help with programming and debugging the BlueNRG-M2SA module. I am just not able to get started and successfully connect to the module using ST-Link v2 over SWD. Neither ...
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0 votes
1 answer
79 views

Max4080 REF pins

Bought the Max4080 module and as usual I read the datasheet after purchasing it. In the datasheet pin 6 and 7 are NC but on the module those two pins are connected as F1B and F1A: What F1B and F1A ...
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0 votes
1 answer
1k views

Any solution to avoid humming sound / speaker noise for MP3 bluetooth module?

So I have here sub woofer Simbadda CST 5100N and I want to convert it to bluetooth, so bought an MP3 bluetooth module to convert it. The module needed 5 to 12 volt DC to operate. Inside the speaker, ...
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0 votes
2 answers
984 views

Should I remove the termination resistor from the CAN Bus transceiver module?

I develop a CAN-BUS receiver (logger) with an ESP32 and CAN-BUS transceiver. The CAN-BUS transceiver modules which I found and bought have both 120 Ohm termination resistors. But the CAN-BUS to which ...
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1 vote
1 answer
888 views

Verilog Missing connection for port

I was creating a circuit using two dual input AND gates into a dual input NOR using three modules and module instantiation. The first module is for the AND inputs and the second module is for the ...
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0 answers
108 views

Connecting BLE module to Lipo battery and recharge it?

I would like to use a BLE module, where I can solder a tactile switch. There should be also the option to charge the module via USB. Earlier I have only worked with breakout boards, where I could ...
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1 vote
1 answer
351 views

Instrumentation Amplifier Connection Problem

I am trying to build a circuit capable of measuring ECG signals following the scheme attached. Since AD623 was out of stock, i ended up buying something like this: https://www.arduino-tech.com/cjmcu-...
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1 vote
1 answer
153 views

What is the difference between a hard module and a softmodule in RTL verilog code?

I understand a Verilog code is made up of modules there are RTL codes where a lot of submodules can be instantiated in the main module. If I assume the main module(the top one) to be the parent and ...
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2 answers
708 views

ESP32 FCC Certification

I want to build an esp32 device using the esp32-pico-d4 chip that I will sell to hobbyists. However, I recently came across something called the FCC. It requires radio devices to get certified which ...
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1 vote
2 answers
101 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.
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1 vote
1 answer
65 views

Module identification

Can anyone recognize this module in this pic here? I am analysing a circuit and it would help me a lot!
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1 vote
3 answers
2k views

Instantiating module in condiotional block verilog

Considering a module cannot be instantiated inside if block, how are we supposed to instantiate the module outside the if-else ...
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0 votes
1 answer
340 views

Measure Power Consumption of Battery Charger?

I want to ask how to measure power consumption of battery (Li-On 18650) charger module (TP4056 and USB Boost) and the total power consumption, if i have this circuit: I have already know the power ...
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0 votes
3 answers
470 views

output is affected by the next clock period

I am trying to write verilog code or or thinking about a circuit to do the function below. In the clock period n, if there is a falling edge on S1 then OUT is high for the next clock cycle (n+1), if ...
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  • 1,613
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1 answer
102 views

sequence detector doesn't work expected

I am trying to write verilog code to do sequence detector the the state diagram below. Input is a 2-bit signals and there're 3 state variables as in the image. The goal is to detect the sequence (01)-...
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0 votes
2 answers
1k views

verilog code with two falling edges

Please look at the picture for this description. I have a problem with writing verilog for the following logic: Consider clk and R3 are input signals & out is the output signal. At the falling ...
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0 votes
1 answer
200 views

How to assign a single output to different modules in Verilog?

I have designed a simple ALU using Floating Point IP Cores in Xilinx ISE. I have an adder, a subtractor, and a multiplier. The IP Core of addition does the subtraction too and we have only two modules ...
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