Changes between Initial Version and Version 1 of Springleaf


Ignore:
Timestamp:
Nov 8, 2013, 10:17:53 AM (7 years ago)
Author:
hazen
Comment:

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  • Springleaf

    v1 v1  
     1== Battery Connection Terminal ==
     2
     3== Discharge Timer ==
     4
     5This device provides a 5-second controlled discharge for a custom battery
     6when triggered by a pushbutton.  The maximum current is 100mA.  The discharge
     7circuit is to be isolated from the power source.  Power from AA batteries is acceptable.
     8
     9The would like one prototype in one week (by 5/7/12) and potentially 4 more units later.
     10We agree that the first prototype would be hand-wired in an aluminum Bud box.
     11
     12* Schematic – [http://ohm.bu.edu/~hazen/Springleaf/Timer1.sch Timer1.pdf] •  [http://ohm.bu.edu/~hazen/Springleaf/Timer1.sch Timer1.sch]
     13* [http://www.bowdenshobbycircuits.info/page9.htm#555mono.gif 555 Monostable Relay]
     14
     15===  PCB Layout  ===
     16
     17Schematic and PCB layout was done in ExpressPCB and put [http://edf.bu.edu/~cwoodall/Springleaf/ here]
     18
     19* [http://ohm.bu.edu/~cwoodall/Springleaf/Timer/Timer.pcb Timer.pcb]
     20* [http://ohm.bu.edu/~cwoodall/Springleaf/Timer/Timer.sch Timer.sch]
     21* [http://ohm.bu.edu/~cwoodall/Springleaf/Timer/Timer_bom.csv Timer.csv]
     22