Voltlog #83 – InTheMail

Hello, and welcome to a new InTheMail. It’s been awhile since we’ve had one but don’t worry small packages from China continued to arrive, even through the holiday season and as a result I have plenty of new stuff to show on video.

Voltlog #82 – DIY Adjustable Analog DC Electronic Load

In this episode I am building an analog adjustable dc load with parts easily obtainable from ebay and banggood. The advantage of such a dc load is that you can understand how it works, modify or repair it if necessary far easier than you would with a digital one. I was able to push mine up to 60W dissipation, but it is recommend to stay under 50W to protect the mosfet.

Here is a list with links to the parts used in this project:

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 #77 – InTheMail

Here is a list with the items shown in this video:

  • USB Drive Spy Camera
  • 35W Radar Motion Sensor Switch
  • 4 Channel Wireless Remote Control Switch
  • 64 LED 20W 2835 Horizontal Led Light
  • 64 LED 60W E27 5730 Light Bulb
  • 21 LED 15W E27 Globe Light Bulb
  • 21 LED 15W E27 Energy Saving Light Bulb

Links for all of these will be in the video description on youtube.

Voltlog #76 – InTheMail

This what happens when I left myself on a shopping spree, you get a month’s worth of InTheMail episodes. So let’s get started on the 4th episode in a row showing the stuff I get from China.

Here is a list with the items shown in this video:

  • Brushless Blower Fan 12V 5015S
  • Brushless Blower Fan 5V 6015S
  • Cooling Fan 5V 2 Pin 50x50x10mm
  • Fan Grill Guard 50mm
  • Aluminium Heatsink 150x60x25mm
  • TO-220 Aluminum Heatsink 34x12x30mm
  • 100W Wire Wound Aluminium Housing Resistor
  • 200x175x70mm Plastic Enclosure For Instrument
  • 170x130x75mm Metal Enclosure For Instrument
  • Rubber Feet Self Adhesive 15mm
  • LM2596 DC-DC Step-Down Converter Module
  • XL6009 Buck-Boost DC-DC Converter
  • 10A BMS 3S Battery Protection Module
  • Zener Diode Assortment – Through Hole
  • Zener Diode Assortment – SMD
  • PT4115 LED Driver IC

Links for all of the items will be in the video description on youtube.

Voltlog #75 – InTheMail

As mentioned in the previous video this month will be mostly InTheMail episodes because I just have a bunch of stuff from China and I gotta show it to you before I go use it on other projects. Same as before I tried grouping similar items in this episode so let’s get started on another InTheMail.

Here is a list with all the items shown in this video:

  • Bourns 10K 10 Turn Potentiometer
  • Plastic Rotary Knob 6mm Shaft 10pcs
  • 16mm Potentiometer Knob Black With 6mm Shaft
  • 3P4T 3 Pole 4 Position Rotary Selection Switch
  • On/Off Momentary Push Switches
  • PBS-11A Locking 2 Pin On/Off Switch
  • KSD9700 Slim Bimetal Temperature Switch
  • KSD301 Bimetal Temperature Switch
  • 2mm Binding Post Plug Connectors
  • M5 Banana Jack 4mm Socket
  • 3.5mm Slim Metallic Stereo Jack 4 Pole
  • JST XH 2.5mm Connector With Wire Set
  • 1007 Hook Up Wire 24AWG

Links to all of these products are in the video description visible on youtube.