Editing Smart Battery Charger with Graphical Data Logger

Jump to navigation Jump to search

Warning: You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to your username, along with other benefits.

The edit can be undone. Please check the comparison below to verify that this is what you want to do, and then save the changes below to finish undoing the edit.

Latest revision Your text
Line 59: Line 59:
 
=== Analog Charger Hardware ===
 
=== Analog Charger Hardware ===
  
Circuit overview.  An operational amplifier and darlington transistor will be used as a constant current source.  A second operational amplifier will amplify the current signal for input to the PIC.  A third operational amplifier will amplify and condition the voltage signal for the PIC.  The operational amplifiers will be powered by a single 5 volt power supply. Input voltage will be between 12 and 25 volts so that many cell batteries can be charged.  To reverse the current for discharge 2, 2 pole relays will be used.  The relays could be replaced by a double pole double throw switch ( the user, not the software would have to be used to throw the switch ).  
+
Circuit overview.  An op amp and darlington transistor will be used as a constant current source.  A second op amp will amplify the current signal for input to the PIC.  A third op amp will amplify and condition the voltage signal for the PIC.  The op amps will be powered by a single 5 volt power supply. Input voltage will be between 12 and 25 volts so that many cell batteries can be charged.  To reverse the current for discharge 2, 2 pole relays will be used.  The relays could be replaced by a double pole double throw switch ( the user, not the software would have to be used to throw the switch ).  
  
 
Board design will be in Eagle, single sided for Toner Transfer.
 
Board design will be in Eagle, single sided for Toner Transfer.
  
  
Schematic (preliminary)
+
Schmatic ( premiminary )
  
 
[[Image:SC_C.png]]
 
[[Image:SC_C.png]]
  
Board (preliminary)
+
Board ( premiminary )
  
 
[[Image:SC_B.png]]
 
[[Image:SC_B.png]]

Please note that all contributions to OpenCircuits may be edited, altered, or removed by other contributors. If you do not want your writing to be edited mercilessly, then do not submit it here.
You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource (see OpenCircuits:Copyrights for details). Do not submit copyrighted work without permission!

Cancel Editing help (opens in new window)