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December 18, 2008 |
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Description
Modify an existing circuit design and electronic code to be more robust.
DC supply of 24vdc +/- 50v Powering a PIC chip that has a square wave signal input 0-125hz from an open collector hall effect transistor that has 5-24vdc 12vdc nom input from the circuit board.
When the frequency reaches 17hz for 4 seconds turn on a relay and led and wait 1 hour then turn the relay off. If 17hz is reached for 4 seconds again reset timer. Rough source code attached.
A current circuit design will be attached as well. Items to be added to the design will be 1. Some lighting protection 2. Reverse polarity protection 3. Different Voltage regulator setup to facilitate operation of the circuit below 50vdc 4. Current limit of 3a to the relay controlled dc output.
Product will include a cad drawn schematic, new parts list, and new source code. If I am missing anything important please pm me.
Additional information:
Submitted on 12/18/2008 at 21:49 EST
The dc supply voltage is 24vdc nominal and never more than 50vdc.
Additional information:
Submitted on 12/18/2008 at 22:02 EST
Attached are the component descriptions for the circuit diagram.
Additional information:
Submitted on 12/19/2008 at 15:23 EST
Here is all the data for my project.
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