Welcome to a new voltlog, in a previous video I showed these C5W LED bulbs that I got from ebay they were very cheap so I put them to a test and discovered they reached very high temperature in just 15 mins of running in free air which got me concerned, the fixture of this bulb could melt.
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.
Links to all the items shown in the video are below:
Welcome to a new InTheMail, the series that everybody seems to like, seriously I’m thinking this is starting to look like some group meeting where we all have the addiction to keep purchasing cheap electronic stuff from China.
Here is a list with the items shown in this video:
SG3525A PWM generator module
Photocell Automatic On/Off Light Switch Relay
B0505S-1W Isolated 5V DC-DC Converter
5V 2A DC-DC Converter USB Charger With Voltmeter Module
5V 3A DC-DC Converter USB Charger Module
12V 0.5A AC-DC Switching Power Supply Module
LCD1602 I2C Serial Interface Adapter Module
WS2812 RGB LED Controller
WS2812 RGB LED Strip PCB Module
You can find links to all of these items in the video description visible on youtube.
Once again too many mail items to fit into a single video, so we have a two parts upload. In the first video I only had time to show two items the SONOFF from ITead and the SP mini from Broadlink but that is including teardowns and discussions on the internals. Surprisingly the SP mini doesn’t use the ESP8266 as expected but instead it uses the MT7681 from MediaTek.
The assembly of this LED persistence of vision kit started well but it soon went bad because of poor design and lack of instructions. There is no documentation on how to assemble the mechanical parts so you have to figure that out yourself. There is no mention or pictures of how the LED’s should be soldered and to my surprise they need to be soldered on the edge of the PCB. There is no information on how to load the firmware or custom text patterns. After some research I did manage to find a chinese app which is supposed to work with this kit but I had no success in writing/uploading anything to the microcontroller.
I even spent an hour or so with google translate and, translated to english most of the buttons and messages in the app.
At this point I’m not sure if my problem is in the hardware(unlikely) or if I need to program the microcontroller, or if the microcontroller has some firmware and I just need to upload a custom display pattern using that chinese app.
Too much time & effort has been wasted so I’m not going to follow this anymore. My recommendation: don’t buy this kit unless you have too much free time and you enjoy solving complicated (chinese) problems.