Search:

Type: Posts; User: jtronix

Page 1 of 3 1 2 3

Search: Search took 0.01 seconds.

  1. Replies
    1
    Views
    725

    Closed: LoRa maximum range and speed

    Hi,

    I'm looking for wireless device which can send the log data to my PC. distance between PC and device will be around 3km.

    I have search few devices and I found that LoRa will be suitable for...
  2. Closed: Toe, Heel and Side size in PCB library expert and Altium Designer

    When i was creating a footprint i found that footprint create from PCB library expert and Altium IPC Complaint Footprint Wizard does not match. if both follows the same standard then it should give...
  3. Replies
    2
    Views
    2,107

    Closed: Re: MQTT Porting with microcontroller

    Yes I will port it on bare metal platform or with FreeRTOS
  4. Replies
    2
    Views
    2,107

    Closed: MQTT Porting with microcontroller

    How to port MQTT to any microcontroller?

    I download MQTT code from Github but din't understand how to use it for different microcontroller such as NXP,TI,ESP8266...etc

    Any body know how to get...
  5. Replies
    6
    Views
    1,650

    Closed: Re: Looking for audio amplifier for Radio

    I've searched on aliexpress where majority of the IC's are from chinese make
  6. Replies
    6
    Views
    1,650

    Closed: Looking for audio amplifier for Radio

    Hi,

    I got easy design from ST TDA2822 but only problem is TDA2822 original chip from ST is not available easily from local supplier. Chinese supplier has cheap TDA2822 but not have idea whether it...
  7. Closed: Re: Need circuit for mute the unwanted audio (Squelch control circuit)

    Not understood what you are trying to say
  8. Closed: Re: Need circuit for mute the unwanted audio (Squelch control circuit)

    @vfone
    Do you know why this is not working??
  9. Closed: Re: Need circuit for mute the unwanted audio (Squelch control circuit)

    Basically I'm using DRA818 module for walkie talkie application.
    In this module squelch level are configurable from 1 - 8 level and 0 - is for continuous scan mode.

    If I set 1 - 8 squelch level...
  10. Closed: Re: Need circuit for mute the unwanted audio (Squelch control circuit)

    Do you have any reference design or could you share more information?
  11. Closed: Re: Need circuit for mute the unwanted audio (Squelch control circuit)

    1) I'd implemented the circuit but couldn't get the required output.

    MPF103 and audio amplifier section not implemented as in my circuit i'm using LM4871 for amplification.
    I'd just monitored the...
  12. Closed: Re: Need circuit for mute the unwanted audio (Squelch control circuit)

    thanks vfone.

    Is there any way to control squelch by software??

    Note: I'm using 16 bit micro controller so it doesn't have audio processing capability.
  13. Closed: Re: Need circuit for mute the unwanted audio (Squelch control circuit)

    Thank you for your response

    Can you please confirm capacitor value in schematic because some of the capacitor value is just mention like 005 and 002
  14. Closed: Need circuit for mute the unwanted audio (Squelch control circuit)

    Hi,

    This is a basically audio without squelch control.
    I want to mute the speaker when there is no signal present. Is there any way to mute this audio??
    Please share the schematic

    142427
  15. Replies
    1
    Views
    545

    Closed: copy code from ROM to RAM and execute

    Hi,

    I want to write data into internal flash where code is being executed. When i perform write operation on flash at that time i can not read or execute from flash so in this case i have to copy...
  16. Replies
    2
    Views
    2,109

    Closed: Re: Antenna for RF module?

    I'd watch video for design VHF antenna. Need antenna dimension calculator for different frequency.


    https://www.youtube.com/watch?v=WiErTzoCyAA
  17. Replies
    5
    Views
    3,005

    Closed: Re: Low pass filter for RF antenna?

    Thanks for you kind support

    Can I use SMD inductor instead of coil type??

    My Transmit frequency is 150MHz and received frequency is 155MHz can you please help me to design low pass filter for...
  18. Replies
    5
    Views
    3,005

    Closed: Low pass filter for RF antenna?

    138782

    Basically I'm looking for filter for antenna for frequency (150 to 155 MHz). I'd google it and got some result but i don't know how to made such type of inductors.

    In image if you see...
  19. Replies
    2
    Views
    2,109

    Closed: Antenna for RF module?

    I would like to buy antenna for my walkie talkie my transmit frequency is 145MHz and Receive is 155MHz.

    From where i can buy the antenna and which type of antenna is good for long range?
  20. Closed: Re: Looking for long Range Wireless Audio transmitter and receiver

    Does DRA818U work for me?

    In many review i found that it will cover 3-5 Km line of sight?
  21. Closed: Looking for long Range Wireless Audio transmitter and receiver

    Hello,

    I'm looking for long distance about (5-10 km) audio voice transmitter and receiver.

    I'd seen few chip from TI and NXP Sub GHz but i'm unaware of that whether it is suitable for audio or...
  22. Replies
    0
    Views
    858

    Closed: Ti cc3120/3220 vs esp8266

    Hello,

    I'm looking for WiFi solution for my IOT project where I need HTTP, MQTT, TCP and OTA feature.

    I'd seen some of the quite good solution with ESP8266 and also it is cheapest about 2$,...
  23. Replies
    0
    Views
    962

    Closed: Getting started with Wemos D1 Mini Pro

    Hi,

    I want to interface D1 mini pro module with my LPC1788 microcontroller.

    How do I program Wemos D1 mini pro??

    I want to use it for MQTT and HTTP??

    After searching many examples I found...
  24. Closed: How to create web pages for Embedded Web Server

    Hello,

    I want to create web server for micro controller based system. I need help to get started with making page and map page variable in code.

    I have seen TI TM4C1294 examples but in that if...
  25. Replies
    0
    Views
    1,262

    Closed: Telit vs Simcom GSM Module??

    Hello,

    I have seen several GSM module of telit and Simcom. I found that telit modules are expensive than Simcom, but i'm not aware of performance and usage of both modules.

    Can anyone share...
Results 1 to 25 of 71
Page 1 of 3 1 2 3