Makey Makey | Buy Direct (Official Site) Making Very Accurate Timers - Electronics Find out about how to make very accurate electronic timers home > electronicsWe have previously published many articles about electronic timers - ranging from short interval timers using the common 555 IC, long interval (multi-hour) timers using a 4060B binary counter IC, and repeat timer circuits which use both. We have also looked at commercial 12V programmable timer switches, and how battery powered programmable thermostats can be modified to operate as (more affordable) equivalents. In this article we will look into how an accurate timer can be put together which will keep good time for weeks or months at a time. The Importance of Timer Accuracy Timers built around the 555 IC are only accurate up to a few minutes - after about 20 minutes that they can become wildly inaccurate. How do Clocks Keep Time Even the cheapest watch or clock can keep time accurately to within a few seconds per 24 hours, so we should look at how they work. Making an Accurate Electronic Timer Buy a Timer electronics
Hobby Engineering Home Page 10 Best Electronics Suppliers First off, I would like to give notice to Electronics Projects for Dummies for most of this info. I wanted to make a site with many of the best sites to buy Electrical Parts, because it can sometimes be a strenuous activity. I have 10 here, because if you can't find something on one online store, you might be able to find it on the next. Reynolds ElectronicsReynolds Electronics is a good supplier of remote control components, micro controllers, and robot kits and parts. One feature that stands out on Reynolds Web site is the clear and helpful project/circuit tutorials. Hobby EngineeringHobby Engineering is a sit slanted towards the hobbyist. All ElectronicsAll Electronics has an incredible selection of many of the useful items you would use to build your project. BG MicroBG Micro is a cool site for rare and pretty neat gadgets as well as a nice selection of alot of the items one will need for a weekend project. Jameco ElectronicsJameco has a very nice site catalog.
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