andrewsych
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andrewsych 12/12/2019
It’s a nice compact amplifier. But there is a mistake with the silkscreen on the speaker output terminals. One channel is labeled backwards so the speaker will be out of phase. See the photo showing the correct labels. Also most Chinese Bluetooth receivers have an annoying loud start up jingle. As does this one.
Geekcreit® TPA3110 placa amplificadora digital bluetooth 4.2 15Wx2 Amplificador de potencia estéreo de clase D DC 8V-26V
US$12.64 US$13.99
10
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100 piezas 5 mm redondo púrpura UV LED diodo súper brillante agua transparente luz LED Lámpara color púrpura
US$3.99 US$8.99

Q: Wavelength? 405nm?

Preguntado por andrewsych sobre 2019-05-07 01:48:42

BG619351543 No

2021-09-13 02:54:46 Servicial (0)
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andrewsych 13/07/2021
My unit did not come with the carrying case as pictured in the description.
Detector portátil de cámaras ocultas y buscador de dispositivos de escucha. Alarma antirrobo contra cámaras espía.
US$27.71 US$28.99
0
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andrewsych 29/07/2019
A nice vintage looking analog meter. I prefer this over a digital meter. I did modify the meter movement by installing two 3mm warm white LEDs inside the meter.
YIHUA 502D 5V 2A Mini Fuente de Alimentación DC para Reparación de Teléfonos Móviles
US$31.17 US$32.99
1
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andrewsych 25/11/2019
I bought the dual input version. The displayed data is quite handy for one to see the charging current of the device’s battery. As the battery is close to a full charge the current slowly decreases.
UNI-T UT658 Serie Tipo A Type C Probador de seguridad de voltaje USB eléctrico Voltímetro Amperímetro Capacidad del cargador Medidor Volt Corriente
US$18.47 US$19.99
0
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andrewsych 30/03/2019
This is a great kit that shows how the electromagnetic field works by lightning up the supplied neon lamp when held close to the coil.
DIY Dry Batería Kit de bobina Tesla alimentada Mini Kit de módulo Tesla
US$4.19 US$4.39
2
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andrewsych 14/11/2019
Nice but.. I downloaded the driver indicated in the item description and it’s working. But I have the Retropie system loaded and the display only shows text and no graphics. The graphics are only visible through the HDMI port on my system.
Geekcreit® 3,5 pulgadas TFT LCD Pantalla táctil + Protector Caso + Kit táctil Pluma Para Raspberry Pi 3B + / 3B / 2B
US$25.40 US$26.99
0
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andrewsych 27/09/2019
What a beautiful lamp. I’m going to use it during the holidays. The glass lamp was broken during shipping. I contacted customer service and they promptly sent a replacement. Thank you.
E27 3W vendimia Edison LED bombilla demócrata de vacaciones multicolor para la fiesta de Navidad AC85-265V
US$10.70 US$14.23
0
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DIY Electronic LED espectro de visualización kit de formación de control de voz
US$6.64 US$9.96

Q: I’ve built three of these kits. One worked perfectly, the next one has random noise on the display which isn’t reacting to sound, and the third has very weak microphone gain. Does anyone have a schematic of this kit?

Preguntado por andrewsych sobre 2019-06-26 01:01:42

Tricoaster I did not have it

2019-07-02 03:47:12 Servicial (0)
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respuestas (1)
andrewsych 03/07/2019
This is a good clock. But you have to be able to solder surface mount components. One IC has a very small pitch and you need a tiny tipped soldering iron and 0.5 mm solder.
Geekcreit® Tubo Digital de Color de Arcoíris de Gran Tamaño DS3231 DIY Kit de Reloj
US$29.18 US$26.99
0
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andrewsych 29/01/2019
It’s well built and feels good to hold. The red light mode is good fo preserving one’s night vision. The main LED is pretty bright. I put a flat top 18650 inside and it fits fine.
Linterna de Inspección LED de Cola Magnética Plagable XANES 1305 XM-L T6+COB
US$17.33 US$17.00
0
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andrewsych 29/01/2019
It’s worth the price.
XANES RD03 Función 4 en 1 650nm Ballpen Capacitive Touch Red Láser Puntero
US$3.00 US$5.54
0
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andrewsych 22/01/2019
This lamp is pretty bright for a tritium lamp.
1pcs Trit Vials Tritio Multicolor auto-luminoso 15-años 3x22.5mm
US$28.86 US$29.99
0
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andrewsych 05/08/2018
Some of the LED’s burned out after a few days.
1M USB/ Luz de Tira Neon LED en Forma de Señal de Corazón Alimentada por la Batería Blanco Caliente y Rosado para Boda y Cumpleaños
US$10.27 US$10.93
0
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andrewsych 18/06/2018
I’ve just received one of these meters. It comes with a nice storage pouch and two set of probes. The backlit display is bright and easy to read. The accuracy is close enough to my Fluke meter. The low ohms scale isn’t that good for hundredths of an ohm measurements. The reading is constantly changing. But otherwise it’s a great inexpensive meter.
ANENG Q1 9999 Cuentas Verdadero Valor Eficaz Multímetro Digital Voltaje Corriente Resistencia Capacitancia Probador de Temperatura Auto/Manual con Gráfico de Barras Analógico.
US$32.99 US$51.99
0
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Usted es el experto, ¿puede ayudarme?

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