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| Electronic Projects Design/Ideas/Reviews Are you building an electronic project or want to? Maybe you need some assistance? Come and submit your electronic questions here and let our experienced members find a solution. |
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22nd December 2007, 09:58 PM
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 power generator meter I'm working on a plan to show how much power is created by a human-powered generator in a given amount of time by using a series of colored bulbs. As more power is generated the bulbs (or potentially just LEDs) light up in series (not sure how many yet, maybe 6-10, so Im thinking about something scalable) until a set amount of power has been generated and all the bulbs are lit. The circuit can then be reset and repeated. At the moment I've got 24vdc generators, but those can easily be switched out. I'm really not sure where to start right now. I'm also open to convincing fakery  so I'd really appreciate whatever help you can give me.. | |
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22nd December 2007, 10:52 PM
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| LM3914 Search it up. | |
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23rd December 2007, 02:14 AM
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| Thanks. I'd been looking at those. Its an instantaneous thing though? I'm trying to build something thats more..cumulative? The classic analogy would be filling a line of water buckets one at a time until theyre all full. Which makes me think of capacitors... | |
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23rd December 2007, 03:55 AM
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| ade7756 is a dedicated power meter chip to store the results use a microcontroller(PIC, etc). Alternative read the voltage drop across a very low ohm resistor and store the info on a microcontroller | |
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23rd December 2007, 04:38 AM
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| Yes, you need to intergate the generator output over time to get a total power generated value. Some Op amps and some caps should make for a fairly simple design. Lefty
__________________ Measurement changes behavior | |
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23rd December 2007, 01:43 PM
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| Feed the output of the generator into a resistive load, and have a meter displaying the temperature rise of the load. | |
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23rd December 2007, 03:11 PM
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__________________ I No Longer accept Private Messages on here. All Emails to me Must Contain the Word \"Electronic\" in the \"Subject Line\" or they go Directly to my Junk Mail Folder. Email me at: chemelec@hotmail.com Website: http://www3.telus.net/chemelec | ||
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24th December 2007, 02:56 AM
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| power meter Hi eggpie, you'll be amazed how little the human power is compared to a horse power. Consult your doc and have a "ride" on an ergometer being set to 100W ouput. Even if you are well trained and fit the doc will order you to quit after 15minutes. At that time your heart beat frequency will be almost close to death. Boncuk | |
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