Top Positive Review for Clock on Banggood UK|Shopping UK

33% OFF 5pcs DS3231 AT24C32 IIC Precision RTC Real Time Clock Memory Module US$17.99 US$26.69 View It

Overall:

Photo73 30/06/2021

Le circuit est fait pour une batterie (rechargeable genre LIR2032) et assure donc son maintien en charge. Si on utilise une pile standard, qui s'use quand on s'en sert, l'idéal est d'enlever la résistance de 200 ohm (marquée 201), les piles n'aiment pas être rechargées. Tel quel le montage consomme 6mA sous 5V, 3mA et qq vont vers la pile (! ou batterie si on a choisi cette option), et 3mA dans la led rouge (inutile). Réduit à l'essentiel, il consomme 600µA sous 5V mais n'éclaire plus. :-)

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Photo73 Sur 5 plaquettes, j'avais 9, 5, 7, 6, 1 secondes de retard au bout de 23 jours vs heure GPS, mais un registre (vieillissement) permet de corriger ça dans la puce, en unités de 0,1ppm ( 127/-127 maxi). On peut donc avoir un décalage 'nul' si on est patient pour régler l'écart quand il existe et si ça gène (mesures qui peuvent durer un an, autant être précis).
Reply 16/01/2022

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