Questions tagged [module]
The module tag has no usage guidance.
49
questions
0
votes
1answer
50 views
Charging to start only when battery voltage drops to 3V
I have a 3.7V li-ion battery permanently connected to a 4056 charging module.
As now, of starting the very second it drops below 4.2V.
I would like to make a circuit that enables charging ONLY when ...
-2
votes
1answer
41 views
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 ...
0
votes
0answers
28 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 ...
0
votes
1answer
67 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) ...
0
votes
1answer
86 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 ...
-2
votes
1answer
122 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 ...
0
votes
2answers
31 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 ...
0
votes
1answer
57 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 ...
0
votes
1answer
149 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: ...
0
votes
1answer
73 views
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 ...
0
votes
2answers
62 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 ...
0
votes
1answer
192 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.
0
votes
0answers
30 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 ...
0
votes
0answers
30 views
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 ...
1
vote
0answers
53 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 ...
5
votes
4answers
673 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....
2
votes
1answer
246 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 ...
1
vote
1answer
91 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. ...
1
vote
2answers
307 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 ...
-1
votes
1answer
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 ...
0
votes
0answers
83 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 ...
-1
votes
3answers
140 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 ...
0
votes
1answer
122 views
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 ...
9
votes
1answer
696 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 ...
0
votes
1answer
267 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.
...
2
votes
1answer
85 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.
1
vote
1answer
48 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 ...
0
votes
3answers
258 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 ...
0
votes
0answers
47 views
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 ...
1
vote
0answers
543 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 ...
0
votes
1answer
61 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 ...
0
votes
1answer
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, ...
0
votes
2answers
823 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 ...
1
vote
1answer
672 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 ...
0
votes
0answers
96 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 ...
1
vote
1answer
302 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-...
1
vote
1answer
124 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 ...
0
votes
2answers
523 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 ...
1
vote
2answers
100 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
vote
1answer
63 views
Module identification
Can anyone recognize this module in this pic here? I am analysing a circuit and it would help me a lot!
1
vote
3answers
1k 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 ...
0
votes
1answer
297 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 ...
0
votes
3answers
413 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 ...
0
votes
1answer
91 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)-...
0
votes
2answers
997 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 ...
0
votes
1answer
65 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 ...
0
votes
2answers
430 views
Instantiating modules in SystemVerilog
This is a picture of a system that I am building:
(original)
I am writing SystemVerilog for the Counter4to3 module, whilst the other modules (Full adder and half adder) have already been provided to ...
0
votes
3answers
645 views
doubt when Arduino connects to multiple i2c devices
I am using Arduino nano to drive multiple i2c devices, actually, they are premade modules which are available on eBay.
ads1115 ADC, ds3231 RTC, 20x4 character LCD i2c module, at24c02 EEPROM module
...
0
votes
1answer
504 views
Verilog Include Statement Error
I'm trying to teach myself Verilog. I have some previous experience using VHDL. I am using Lattice Diamond as my environment.
I successfully created and simulated a full adder. I now want to use this ...
