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Project:AlarmClock: Difference between revisions
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***no, they mostly start with bieber and, although it's beyond belief, proceed to something even worse such as rap or some whiny R&B. | ***no, they mostly start with bieber and, although it's beyond belief, proceed to something even worse such as rap or some whiny R&B. | ||
== Ways of determining the current time == | |||
* NPL (was MSF) radio signal. Symtrik module is the popular option, available from [[http://www.pvelectronics.co.uk/index.php?main_page=product_info&cPath=9&products_id=2 PV Electronics]]. This is very simple to decode, but the Symtrik module is very sensitive to supply voltage and I haven't been able to get this working from the mains yet. | |||
* DAB. The Venice 5 module is common, but not generally available (forums recommend buying cheap complete DAB radios and breaking them apart). See Elliot's section below. If this can be made to work, it has the obvious bonus of better radio stations. | |||
* GSM. No idea if this can be done cheaply enough. | |||
* GPS. Receivers can be bought cheaply, but require an outdoor or close to outdoor antenna. | |||
* Mains frequency and BBC longwave radio both offer relative time signals, but are not enough to determine the absolute time. | |||
== Prototypes == | == Prototypes == | ||
