InTheMail | Voltlog
High quality PCB Services https://pcbway.com Welcome to a new InTheMail, the series that will touch both your passion for electronics and your bank account at the same time. Checkout the items I received in this mailbag which include: COB Pocket Flashlight, Workbench Tool Holder Rack, BST-5021 Wire Stripping Tool, Nylon Thick Sewing Thread, Key Fob Storage Waterproof Bag, Multimeter Magnetic Clip Strap, Magnetic Field Viewing Film, Paper Insulating Washer, Waterproof Panel Indicator Lights, 433MHz SI4463 Serial Link Module, HXJ8002 1W Mono Amp, PAM8302 1W Mono Amp, Four Quadrant Photodiode Array PDA5927, Soldering Rework Repair Pads.
#CommissionsEarned
00:31→COB Pocket Flashlight Type 1
Aliexpress https://voltlog.com/y/3b9jg
Amazon https://voltlog.com/y/hj8u1
→COB Pocket Flashlight Type 2
Aliexpress https://voltlog.com/y/z63kn
Banggood https://voltlog.com/y/obz7w
Amazon https://voltlog.com/y/unegq
02:34 →Workbench Tool Holder Rack
Aliexpress https://voltlog.com/y/34q7o
Amazon https://voltlog.com/y/1dl9u
03:38→BST-5021 Wire Stripping Tool
Aliexpress https://voltlog.com/y/1jwav
Amazon https://voltlog.com/y/j5hus
04:53→Nylon Thick Sewing Thread
Aliexpress https://voltlog.com/y/z5n7k
Amazon https://voltlog.com/y/itv8g
05:45→Key Storage Waterproof Bag
Aliexpress https://voltlog.com/y/w0ejm
Amazon https://voltlog.com/y/nhkx6
06:43→Multimeter Magnetic Clip Strap
Aliexpress https://voltlog.com/y/fyusr
Amazon https://voltlog.com/y/vm4e3
08:17→Magnetic Field Viewing Film
Aliexpress https://voltlog.com/y/xq9mb
Amazon https://voltlog.com/y/oc0p7
09:20→Paper Insulating Washer
Aliexpress https://voltlog.com/y/ktizc
Amazon https://voltlog.com/y/d4qru
Banggood https://voltlog.com/y/vgk3y
09:46→Waterproof Panel Indicator Lights
Aliexpress https://voltlog.com/y/6bd59
Banggood https://voltlog.com/y/w1t69
Amazon https://voltlog.com/y/hnmr9
10:50→433MHz SI4463 Serial Link Module
Aliexpress https://voltlog.com/y/6t92w
Amazon https://voltlog.com/y/owq8x
Banggood https://voltlog.com/y/0x246
11:34→HXJ8002 1W Mono Amp
Aliexpress https://voltlog.com/y/p0zn8
Amazon https://voltlog.com/y/voalg
12:15→PAM8302 1W Mono Amp
Aliexpress https://voltlog.com/y/jy5a2
Amazon https://voltlog.com/y/3cbor
12:40→24GHz mmWave Radar LD2410
Aliexpress https://voltlog.com/y/ivach
Amazon https://voltlog.com/y/5vt1f
14:09→Four Quadrant Photodiode Array PDA5927
Aliexpress https://voltlog.com/y/3ac7d
15:28→Soldering Rework Pads
Aliexpress https://voltlog.com/y/xh0nu
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Also for my activity board project I was thinking I might need a very small audio amplifier to play some audio feedback and I looked through my existing modules and I didn’t have anything tiny that would work ok for a half a watt speaker up to 1W so I ordered these two from aliexpress. This blue PCB is model number HXJ8002, single channel approximately 1W into an 8ohm load, input voltage range 2-5.5V, takes a stereo input which I assume it mixes together.
The second one with purple PCB is based on the popular PAM8302 class D amplifier chipset, also a mono output, similar input voltage range 2-5.5V, rated for 1.3W output into an 8ohm load. The only advantage that I see with the purple board is the adjustment pot which might help you fine tune the gain.
mmWave radar sensors are very popular these days, I’ve been working on some projects based on one of these sensors as part of my professional work but it seems like a popular hobby grade choice is this module from HiLink, it’s the LD2410 part number, works at 24GHz, only has 1 TX and one RX antenna so given the frequency, the nr of antennas and it’s output power this won’t give you the ability to sense at more than a few meters, it won’t give you the ability to sense things like a person breathing rhythm, it won’t give you the ability to determine the position of a person on an X Y plane but still it will give you the ability to detect a person's presence. I wanted to test this to see if I can find a use for it in my smart home projects given its availability and low cost. The nice thing about this is that it has a UART interface so you are getting pretty much the data you are interested in, already processed by the onboard MCU. I also ordered another model which did not arrive yet, that oneh showed 4 antennas but they seem to be coupled together 2 by 2 so that might not be able to provide any extra positional data but just more sensitivity.
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