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6 Cijfers DIY Klok Kit Automatische Weergave Tijd DIY Alarmklok Soldeer Oefenkit voor Studenten en DIY'ers DC4.5V-5.5V
US$8.99

Q: Hi, No instructions came with the kit, is there a PDF we can download to cover the assembly and operation please? Thanks

gevraagd door BG173834387 op 2024-04-05 04:13:05

Mr. Bear Everything is written on the PCB board and you do not need special instructions. Operation: left push button hours, right push button minutes, switch to stop seconds run.

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30W QRP Shortwave Antenne HF Antenne 5MHz-55MHz Volledig Afgestemde Antenne voor FT-817 818 703 K1 K2 USDX MCHF
US$46.99 US$54.99

Q: will this work with an SDR Dongle for just receiving ?

gevraagd door BG853375241 op 2023-01-05 02:05:35

Mr. Bear Yes, it will work.

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Geekcreit® DIY Creatieve afstandsbediening Colorful LED-muziek Kerstboomkit Feestdecoratie Kleine geschenken
US$11.99 US$14.99

Q: Everything works except TF card. Verified continuity from MCU pins to card holder pins. Verified GND at card holder. Verified 3.9V at card holder. Used Goldwave to verify PCM unsigned 8-bit, 8000 Hz, WAV. It is a small 37kb test file. Suggestions? Speaker plays tunes correctly from MCU, but plays those whether TF card is inserted or not.

gevraagd door Tblount70 op 2019-12-02 14:19:26

Mr. Bear It must be also in MONO format. I am using very old 128MB SD card and it is working OK...... So it must be WAV file, max 22.05K sampling rate, 8 bit sampling, mono.

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Geekcreit® DIY Black Mirror LED Matrix Desktop-wekkerset met temperatuurweergave Vakantie- en verjaardagsherinneringsfunctie
US$10.99 US$15.99

Q: what type of Battery is needed ?

gevraagd door donwemyss op 2017-11-06 10:36:35

Mr. Bear CR1220

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