1. 8

    PCB Layout - Bluetooth Antenna

    Hello, I made a breakout board for the STM32WB55 and want to use the bluetooth capability of it. Since I never did any layout with RF specs, I wanted to ask some experienced people wether or not the board I designed would 1.) boot up, and 2.) would be able to use the bluetooth feature. The top...
  2. H

    Designing a simple BLE peripheral

    Hello everyone, I'm new to the RF circuits design. I'm a mobile app developer with some basic electronic skills and I need to design a simple BLE peripheral controlled by mobile devices (Android and iOS). The main feature of the peripheral must be to trigger an electronic switch when tapping on...
  3. Dihego

    WT-servo-16

    Hi. I have the "WT servo 16" board from WitMotion. I would like to know if there is another application for android in addition to the one offered by the motherboard manufacturer. Also I would like to know how to connect the HC-06 bluetooth module on the WT servo 16 board. Link WT servo 16...
  4. zazas321

    STM32 + BLE module for super low energy application

    Hey. I would like to get some advice regarding the selection of the bluetooth module for the low power STM32 microcontroller. I also would like some general advice regarding the STM32 and bluetooth modules. I need to send some data on my STM32 few times a day, therefore I thought the best...
  5. I

    T.I. BLE USB MCU Programming Trouble (CC2540)

    Hello Everybody! I am trying to program/communicate with the CC2450 BLE IC, which is a transceiver/microcontroller. My computer is having trouble recognizing the device. It does not show up in Device Manager. I've tried the T.I. tools for trying to communicate with it. I've downloaded the BLE...
  6. A

    Modding wireless RF headphones to Bluetooth headphones

    Hi guys, I have been using a pair of Sennheiser headphones for quite some time now (HDR 118). They offer good sound and sit comfortably, however they do work based on RF signals (863 - 865 MHz) and have been catching a lot of interference as of late. Instead of just getting a new pair of...
  7. B

    How would I go about creating a servo arm, controlled by arduino ?

    hiya! i am thinking of using an arduino nano and bluetooth to control a small car/robot. there will be a type of rake/filter on an arm at the end to sort litter. I want to be able to lift this arm (using servos?) and "shake" it to move the litter into a different compartment. How should I go...
  8. Z

    Motorcycle bluetooth speaker

    Hi there, I want to build a bluetooth stereo speaker set for my yamaha xvs 650a. So due to me never having built something like this before, I have some questions. Buyable speaker sets claim to have either 600W or 1000W amps, and I've found this 2x500W amp board on amazon and was wondering if...
  9. Errorbot1122

    How do you identify ICs and other components on a circuits board

    So i'm currently trying to take parts out of a Bluetooth speaker's circuit-board and find the Bluetooth module for a DIY project. I looked at the board and some ICs and tried looking them up to no avail. So How Do you read an IC or any other components on the board Or even find a schismatic...
  10. W

    proximity sensor 2 meters

    Hi, can anyone help me with ideas on building devices that produce an audible signal when come close to each other, say 2 meters or less. Both devices continue signalling until they are two or more meters apart. Think about a microphone moved close to a speaker - you hear an unpleasant...
  11. M

    ESP32 SerialBT sending data rate is not stable

    Hi all, I'm using ESP32 model: ESP8266 with a built in BT module. I'm trying to open a BT connection between the board and an phone app with sending data rate of ~1-3kHz. I'm using Aruino IDE as a code environment and implementing the connection using #include "BluetoothSerial.h" library...
  12. M

    ESP32 bluetooth baud rate

    Hi, I am trying to communicate between ESP32 and MATLAB. I am able to establish communication correctly. However, I am unable to achieve desired sampling speed. With my calculations I have computed that ESP32 bluetooth is transmitting the data at 115200 bps. I want to increase the baud rate...
  13. S

    HC-05 Module AT command mode won't respond

    I've been trying to connect two HC-05 bluetooth modules together as master and slave devices. I know that to do this i need to establish one as a slave device and one as a master using the AT command mode. I am using an arduino nano with each of the modules and the circuit i have used is shown...
  14. kjrr.2136

    Amplifier for laptop internal speakers

    Hello i am thinking of making a Bluetooth sound bar out of my old laptop lenovo laptop ( ideapad 510) internal speakers, from the internet i learnt that you need to change the digital signal to analog and then amplify the signal before connecting it to the speaker. I am a little worried about...
  15. Sillencio

    JBL Charge 2+ Wont turn on

    Hello guys. I have a JBL Charge 2+, and i got it as a gift. It has no battery inside, but googled that i can turn it on without the battery by just plugging the charger in. I did that but the speaker does not respond at all, and all it shows is a white power button LED, and thats all. When i...
  16. I

    PWM controlled with Bluetooth

    Hey Everyone, I'm designing a circuit that I want to control via Bluetooth, over an iPhone or Android. This is my first schematic and PCB design and I'm looking for some help. I use EasyEDA for my capture and PCB layout. I attached my schematic as a PDF and I will post a link to my EasyEDA...
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