| | 1 | == Battery Connection Terminal == |
| | 2 | |
| | 3 | == Discharge Timer == |
| | 4 | |
| | 5 | This device provides a 5-second controlled discharge for a custom battery |
| | 6 | when triggered by a pushbutton. The maximum current is 100mA. The discharge |
| | 7 | circuit is to be isolated from the power source. Power from AA batteries is acceptable. |
| | 8 | |
| | 9 | The would like one prototype in one week (by 5/7/12) and potentially 4 more units later. |
| | 10 | We 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 | |
| | 17 | Schematic 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 | |
