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4.97 out of 5
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  • 15/03/2021

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  • 30/01/2020

    The resulting board is different from the one shown in the figure. There are no connectors included. And the main thing - assembled two modules and both do not work! When on, the speaker immediately cracks, and when pressing the button changes slightly the frequency of the cod. Changing the supply voltage affects the volume, but not the cod frequency. There are modules in the network with the same set of components, but with a different board and, judging by reviews, they work. I didn't find the module circuitry. By the appearance of the board has n't understood yet. Maybe I'll get to the bottom of it later.

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  • 12/01/2020

    The aim is to teach young people the basics of electronics and how to use a soldering iron (since they update me on the electronic evolution that runs too fast for me). So I buy, and I will in the future too, these simple circuits for their practice. It is clear to me that these kits are cheap, but a sponge to protect the pins of the socket and the integrated circuit would not hurt (look at the photo in what condition they arrived).

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  • 24/07/2020

    Nice set, easy to assemble, because the placing of the components is printed on the pcb. It works good with 5V. Door bell sound is very simple, just two different frequencies.

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  • 23/11/2019

    Barang sudah sampai. Thanks Banggood.com, Meski harga barang tak seberapa, tapi tetap sampai walau dikirim dari luar negeri. Banggood.com olshop terpercaya

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  • 01/10/2020

    It is very good, but it does not contain IC socket.

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  • 19/02/2020

    no voltage requirement was written please specify voltage

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  • 11/10/2020

    Everything is alright !

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  • 04/02/2020

    nice

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  • 31/01/2020

    Still not tried but ok

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