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  • 21/05/2017

    It is a mighty little module, a great addition and building "brick" for your DIY projects. It starts to give output from about 2.8V and cuts out at 2.7V. Be careful though, when you set your output to a value with the input being 2.8V, the change in the input will result in a great change to the output, but this is not specified/guaranteed mode anyways... It may be necessary to keep the output under certain load to achieve stabilization, I will give it some test later on...

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  • 24/05/2021

    Hi. Shipment came fast. 6 days to Croatia. Each product in separate bag. Tried and it can not give 0.8A from 3.7 to 12v on 4100mah lipo batt. So no good so far. Will try on 18650 but...

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  • 05/07/2018

    Perfect Buck-Boost Converter. Useful for projects where you may need a different output voltage of this DC - DC converter. I highly recommend it.

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  • 22/02/2019

    Nice, its good item

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  • 21/09/2021

    Wonderful and excellent quality and beautifully built item exactly the same as described by the seller. A little wonder. Note that at the input below 4 volt it shoots to directly 37 volt out put which can be dangerous.

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  • 22/09/2021

    as described, works fine

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  • 04/09/2019

    This is one of those modules that I find very useful to have on-hand for the final stages of tinkering with electronics. I have several in service to boost 12V lead-acid battery voltage to the 18V required for streaming audio players, as well as one for a (relatively low-current) 24V motor. I have not needed to make use of Buck mode, but passed through that when calibrating for my Boost applications.

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  • 26/01/2019

    Zwar raucht ab und an bei hoher 5A Belastung mal die eine "Diode" durch, aber es macht was es soll und das Preis-Leistungs Verhältnis ist einfach gut. Das Teil hatte ich schon vor einigen Jahren mal in einer Mini-Solaranlage eingebaut. Funktioniert einfach richtig gut. Gerade für Kleinspannung, wo maximal 3A fließen hält das Ding ewig.

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  • 18/11/2016

    I built several solar lighting plants for remote sheds on our property using these as charge regulators for the SLA battery. They deliver when panel voltage is lower than charge voltage, and improve current delivery when the voltage is higher with buck regulation/conversion efficiency. Well matched to my 20 watt panels.

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  • 15/03/2018

    Los circuitos llegaron completos y en buen estado. Comúnmente compro en Banddoog y dejo el envío por default. Pero esta ves, pague por el envío y me llego en 5 días (De China a México). Fue rápido y barato. Lo recomiendo

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