POT4a

revisions from POT4

• add 5pin, 1.25mm header for strain gague
• removed unused input resistors and capacitors
• On POT4 a 1meg resistor was stacked on CC3 - this resistor added to SCH and PCB
• removed 4th order filter, changed 3way jumper to 2way
• 2nd order filter is now NON-Inverting
• unused opamp OPTIONALLY used to drive input cable shield with input single
• changed PCB pattern for output driver caps to CAP200-SQ (acurately represents compoent shape)
• changed 0805 output cable CAP to 1206. Panasonic X5R series @ 25V 1uf to 10uF!
• added 10 turn POT for variable gain (optional)
• remove output driver inline resistors?