Terry
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Terry 19/07/2022
This is a pleasant wind chime. When it arrived, the string that it hangs from came untied, I was able to tie it again easily and I love the music it makes in the breeze.
PATHONOR Wind Chimes with 6 Aluminum Tubes Wooden Wind Bell Memorial Wind Chimes Best Gift Chimes Decor for Garden Patio Outdoor
US$9.99 US$17.99
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Terry 25/04/2022
The item arrived quicker than I expected. The packaging was good and it is a good-looking device. However the 48-volt power supply adapter did not work (voltage output was near zero), and rattled when it was shaken. I opened the adapter and found that a coil had not been soldered to the circuit board and was loose inside the plastic housing. The circuit board was well-labeled and I soldered it into it's proper place. I also re-soldered a couple of "cold" solder joints. When I tried it again after making the repair, it worked and the Tesla coil operates as described. The spark is bright yet safe to touch. The music mode plays via bluetooth, and the sparks' intensity matches the music. The sound is very buzzy, like heavy static. I suspect that some songs will sound better than others, as the crackling and buzzing noises drown out some of the subtle nuance of the music. Still, it's a great conversation piece and a demonstration of Nicolai Tesla's idea (which was to transmit power to consumers without needing wires.)
Stark Long Arc And Bluetooth Music Dual Mode Music Tesla Coil Palm Flash Bluetooth Flash Length 10CM Science Toys
US$69.99 US$99.99
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LUSTREON 10W COB LED Chip DC12V Warm / Pure White 120x10mm for DIY Lamp Light
US$4.50 US$9.99

Q: Do these need a current-limiting resistor?

Asked by Terry on 2017-11-09 03:20:37

BG351738321 hi, i've got a Lipo 12V 8000mah, it works but it heats. Wishing you all the best.

2022-02-08 01:12:55 Helpful (0)
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Terry 28/01/2018
Incredibly thin, lightweight, fits in backpack with notebooks. Has variable brightness, easy to use. If you need a lightpad, this one is recommended. Good for tracing drawings or viewing photographic negatives.
Ultra-thin USB A4 LED Light Copyboard Drawing Pad Tracing Light Box
US$18.99
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