Cirnyan
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Cirnyan 17/02/2018
Easy to adjust, holds the phone nice and firm, and the phone-holding part can be removed from the rotation one and has it's own 1/4 inch thread on the bottom. That makes it a bit more compact if you don't need the rotation, or for attaching it to a ball-joint on a tripod for example.
Ulanzi Tripod Mount Cell Phone Clipper Vertical Bracket Clip Holder 360 Degree Adapter
US$8.04 US$8.81
0
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Cirnyan 17/02/2018
The battery power and charging functionality works well, it charges up to just above 4.1V. A battery is almost required for it to run well in my experience as it'll often cut out and restart the bluetooth chip on fairly low volumes when powered only by a 2.1A rated charger, but with a battery connected it plays without cutting out very far up in volume. It plays quite loud on a pair of 10w rated speakers, but towards the last 15-20% of the volume scale distortion happens that is clearly coming from the amplifier, as I can run these speakers much louder without any distortion from an old analog amplifier. The biggest problem though is that the bluetooth chip adds a very noticable noise just above 11khz, that is more or less noticable at midrange volumes depending on the type of music, but does not become any lower as the playback volume decreases. it's very noticable if you play at a low colume and pause playback, the noise continues for about half a second after it stops getting an audio signal and then the noise stops, too. I Soldered on leads to connect an analog audio source and that played back fine without that noise, so it must be coming from the bluetooth components. This may not bother you depending on your hearing, but those sensitive to such things will probably want to steer clear. For me it's a bit of a dealbreaker, because trying to use a lowpass filter to clear out everything above 11khz just kills all crispness to the sound. The jacks for the cables for speakers and battery are handy, but a bit strangely are a different size for the speaker ones compared to the one for the battery. The jacks can be desoldered if you don't want to use them, but there are no through-holes for the connections, only pads. tl;dr: noisy bluetooth chip kinda ruins it if you've got moderately sensitive hearing, otherwise it's a good board for a compact and easy installation for a small stereo speaker.
SANWU® HF69B 6W+6W Dual Channel Stereo bluetooth Speaker Amplifier Board
US$9.19 US$15.99
1
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Comments (1)
Cirnyan 16/01/2018
The cooling fins get fairly hot during operation unless it gets a bit of extra airflow.
25W E27 Full Spectrum LED Plant Grow Lights Bulb Veg Hydroponic Lamps
US$16.82 US$21.99
1
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Cirnyan 16/01/2018
easy to work with, protrudes far enough that you can mount it withour the pcb showing.
5pcs Micro USB To Dip Female Socket B Type Microphone 5P Patch To Dip 2.54mm Pin With Soldering Adapter Board
US$8.04 US$7.99
0
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Cirnyan 16/01/2018
the plastic casing doesn't feel like it'll give much strain relief to the cable, but a blob of hot glue helped.
10 pcs 2.1 x 5.5mm DC Power Male Plug Jack Adapter Connector
US$2.89 US$8.99
0
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Cirnyan 16/01/2018
the rubber band to hold it closed doesn't feel too sturdy, but you could always just seal it with hot glue once soldered in.
1.7x4.8mm Right Angle L 90° Male Plug Jack DC Power Tip Socket Connector Adapter
US$2.72
0
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Cirnyan 16/01/2018
nice little jumper cable assortment.
New Solderless Breadboard Jumper Cable Dupont Wire Kit Qty70
US$3.09
0
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Cirnyan 16/01/2018
good solder, nice to work with.
DANIU 100g 63/37 Tin Lead Rosin Core 0.5-2mm 2% Flux Reel Welding Line Solder Wire
US$7.99 US$14.99
0
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Cirnyan 16/01/2018
works well overall.
Excellway® ET25 2/3/5 Pins Spring Terminal Block 5Pcs Electric Cable Wire Connector
US$3.44 US$8.99
0
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Cirnyan 16/01/2018
It works well, and comes with double-sided adhesive on the back.
8.5 x 5.5cm 400 Tie Points 400 Holes Solderless Breadboard Bread Board
US$4.59 US$5.69
0
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Cirnyan 16/01/2018
can't complain.
200m 0.55mm 8 Color Circuit Board Single-Core Tinned Copper Wire Jumper Cable Dupont Wire
US$10.34 US$11.99
0
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Cirnyan 16/01/2018
The plastic feels very sturdy with literally no flex even with heavier cameras or lights attached. nicely grippy rubber feet.
Ulanzi Universal Mini Tripod Monopod Foldable Stand For Smooth Q Smartphone Gimbal Stabilizer
US$4.99 US$8.55
0
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Cirnyan 16/01/2018
Nice all-metal construction, well-knurled knob to tighten or release the ball joint.
360 Swivel Mini Ball Head 1/4 Inch Mount For DSLR Tripod Ballhead
US$9.19 US$14.99
0
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Cirnyan 16/01/2018
nice and clear display, it does a quick little "counting up" animation that takes maybe half a second.
Geekcreit® 0.28 Inch 2.5V-30V Mini Digital Volt Meter Voltage Tester Two Line Voltmeter
US$7.24 US$8.99
0
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