Voltlog #93 – Bluetooth Receiver Weekend Update

This week I build a DIY bluetooth 4.0 audio receiver. I used the CSR8635 bluetooth module, a recycled lithium battery cell that I got out of an old laptop, a TP4056 battery charging & protection IC and a DIY PCB I made myself.

Here are links to these items if you plan to build one yourself:

Or you can just buy a ready-made bluetooth receiver.

 

Voltlog #78 – 2x25W Bluetooth 4.1 Stereo Amplifier TDA7492P

In this episode we are going to build a bluetooth speaker amplifier based on the TDA7492P class D audio amplifier coupled with a Bluetooth 4 module. We are not actually going to build the amplifier module because we can get that from China, very affordable, it only costs around $12 shipped which is way less that it would cost us to buy the bluetooth module and the TDA7492P individually not to mention the cost of fabricating a PCB of this size.

So we are actually going to use this module and build the final product with a nice enclosure and a suitable external power supply

Here are some links for the parts used to build this project:

Wiring diagram below:

Voltlog #50 – InTheMail

A new InTheMail video because mail items have been constantly coming in. I hope you’ll find it interesting and if that’s the case, hit that like button so I know you like this kind of video.

Here is a list of items shown in this video:

  • DC-DC Adjustable Step-Down Module with LCD
  • OLED Panel Meter 0-33V 0-3A
  • PWM DC Motor Speed Control
  • BQ24650 MPPT Solar Panel Lithium Lead Acid Battery Charge Controller 5A
  • Battery BMS Protection Board For 3S 18650 Lithium Battery
  • Battery BMS Protection Board For 3-4S 18650 Lithium Battery
  • Mini DC-DC converter Module
  • RS232 Bluetooth Serial Adapter
  • HC-05 Bluetooth Module
  • MP3 Format U Disk TF Card decoder board module amplifier player
  • Digispark Attiny85 Micro USB Development Board
  • RFID T5577 125KHz EM4100 ID Card Copier Duplicator
  • HC-SR505 Mini Infrared PIR Motion Sensor
  • NCP1203D60 PWM Controller IC
  • Energy Meter Electricity Monitor

You can find links for all of these items in the video description.

Voltlog #37 – InTheMail

Hi and welcome to a new InTheMail, this time we have allot of items to look at and some of them were ordered 2 or even 3 months ago but due to the postal service madness that happens every year during holidays they arrived a bit late.

The video is split across two parts to avoid making it too long so make sure you watch both parts.

Voltlog #31 – InTheMail

Usually when I order stuff from China mainland to Romania it takes about 3-4 weeks to arrive while stuff from Hong Kong takes about 5 weeks to arrive. However every year orders placed starting from about 15th of November up to 31st of December take very long to arrive sometimes even arriving after 8-9 weeks. So right now about a third of my orders are late or missing because there is also a good chance they will never arrive once they go past the 8 weeks mark.

A list with links for all the items shown is in the video description so do check them out.

Voltlog #13 – InTheMail AD9850 CC2541 CSR8615 OVC3860 Mifare

In this InTheMail episode I receive the following items:

  • AD9850 DDS Signal Generator Module 0-40MHz.
  • Bluetooth CC2541 4.0 BLE UART Transceiver Serial Module (Texas Instruments).
  • SPK-8615-A Bluetooth 4.0 Mono Audio Module with CSR8615.
  • XS-3868 Stereo Bluetooth Module with Omnivision OVC3860.
  • 1Hz-50MHz Frequency Meter Kit (7 segment LED display).
  • LED POV Rotating Electronic Kit.
  • Macro 58mm Filter Close Up Lens Set For Nikon D3000 D3100.
  • 0.36 Inch Digital Voltmeter 0 – 200V 7-segment LED.
  • SMA male to BNC male coaxial pigtail RG58.
  • BR-2/3A Panasonic Lithium Battery.