Marco81K
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LED Music Spectrum Relógio Kit DIY 512pcs Kit de soldagem LED SMD Kit de luz de display eletrônico de nível DIY
16,60€ 21,21€

Q: Hello, I have just finished all welding for the spectrum analyzer. All LED's in upper right side of the display will not light up. Can you tell me what to look for and how to diagnose this problem. Thank you.

perguntado por azadikian sobre 2021-10-02 21:20:29

Marco81K Check every pin on the integrated circuits, had that problem too. Looking at the schematic and measuring it with a meter helps.

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Módulo de indução de cartão IC RC522 de 3,3V 5Pcs para leitor RFID 13,56MHz 10Mbit/s Geekcreit para Arduino - produtos que funcionam com placas Arduino oficiais
11,66€ 22,13€

Q: Hello. Do you know firmware version of this product ?

perguntado por JL C sobre 2018-07-01 09:10:46

Marco81K Request by Arduino library says 0x12, so no original chip. Working, but not so reliable like the original.

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5V Elétrico Magnético Active Buzzer Beep Contínuo Contínuo
7,45€ 3,22€

Q: Why do they require washing? What is it they are covered in that makes this such a necessity please? Do we need to wear gloves to handle them?

perguntado por BG181554142 sobre 2020-04-15 01:16:05

Marco81K I think it's meant to be removed after soldering and cleaning the whole PCB

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