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12V to 3A 3V / 3.3V / 3.7V / 5V / 6V / 2A 9V DC-DC Step-Down Module Car Adapter
US$8.22 US$11.99

Q: Please specify efficiency!

Asked by Wengel on 2020-07-31 12:58:56

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2020-08-04 01:53:54 Helpful (0)
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Answers (1)
Wengel 03/11/2018
At first use the quality seem very good :-)
Large 250ml Syringe Injector Enema Enemator Kit Douche Colon Cleaning Cleaner
US$10.96 US$19.99
1
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Wengel 21/10/2018
10 out of the 50 M3x8mm had non-3M thread. Impossible to mount a M3 screw.
Suleve™ M3AR1 M3 Aluminum Alloy Standoff Studs 8-35mm Red Round PCB Board Spacers Standoffs 10pcs
US$5.01 US$9.99
0
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Comments (1)
Wengel 09/06/2018
Good value and I'm satisfied with these and will buy them again. But the finish on the "back-side" has scratches and it is somehow important for have a clean and even surface for optimal heat transfer. But I'll use thermal paste/tape to even it out so it's okay. But for high-performance-heat-transfer applications you might want to do some after-finish-improvement on these yourself.
5pcs 100 x 25 x 10mm Aluminum Heat Sink
US$5.84 US$10.99
0
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Comments (1)
Wengel 09/06/2018
The finish on these jacks are perfect. The "spinning-pressure-connector-brackets" (what to call?) are spinning freely as they should but do they provide good connection? I plugged them in a banana socket and got 0 ohm resistant. At 20v@1.5A the voltage drop was also zero, no problem. One could wish for a voltage drop test at 30 amps but that has to be another day ;-)
4Pcs B7 4mm Wire Music Speaker Cable Banana Plug Connector
US$4.70 US$6.99
0
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Wengel 02/06/2018
Rather bad finish, but it does work and will probably do the job just fine so I guess it's OK for the price.
2Pcs 48MM Insulated Binding Post Audio Speaker Terminal Plug
US$4.74 US$8.99
0
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Wengel 24/05/2018
I tested it against my Fluke 177 from 2.5v to 30v. It did a good job all the way.
Geekcreit® 0.28 Inch 2.5V-30V Mini Digital Volt Meter Voltage Tester Two Line Voltmeter
US$6.29 US$8.99
0
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Wengel 24/05/2018
I bought green and white. The LED has good enough light all the way down to 5 volt, even from any angle. Good build quality. It does take a rather small finger-tip to activate the switch, but I guess that's the whole idea with this kind of switch that you can activate is by mistake.
12v 4 Pin 12mm Led Light Metal Push Button Momentary Switch Waterproof Black
US$5.05 US$16.99
0
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Wengel 17/05/2018
No description of terminals,B1, B2 and B3. No description on how to wire when charging the batteries. Haven't tried the board yet. Build quality seem good. See attach wiring diagram.....this helped a lot to understand :-)
4S 30A 14.8V Li-ion Lithium 18650 Battery BMS Packs PCB Protection Board Balance
US$6.99 US$13.99
0
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Comments (1)

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