Editorial Reviews:
Product Description
MX025 is a pre-built module, that gives you a four-digit bright red LED display, attached to a driver module, which offers a 24 hour clock mode, as well as a stop watch mode, capable of counting to either 24 hours, or to 99 hours, depending on the state of a jumper! The thing is, it doesn't do the standard 12 hour clock mode, instead it does 24 hour military time (which is more precise, especially when you can't see the sun).
Hang the display anywhere you need a good bright clock, or stop watch. Mount it in a case if you want, or just as is. Great for public events, stores, timing laps, or just to have around the shop. Anywhere you need a digital clock, you can have one, and it can be seen from pretty far away, because it's 265mm by 95mm, and a very bright red. So bright that it's almost uncomfortable when you have it a foot away from your eyes, and you attempt to look straight at it.
The battery backup terminal allows you to connect 3 AA NiCads, with your own suitable battery holder, so that in the event of a power failure, the module will still remember the time. It has a built in charge circuit as well, so only use rechargables (NiCad). For the main circuit power, this module requires a 12vDC power supply, of at least 125mA (that's what the circuit draws with all segments lit up). The circuit has a built in rectifier, so it doesn't matter if it's center positive or negative. You can use almost any 12vDC adapter you might have, but if you are unsure, then this is what you need.
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