Redesign active electrode PCB

[dymnz]

The current PCB is too fragile in

• Wire connection

  • Should have a dedicated connector

• Board itself

  • Thicker board

• Electrode connection

  • Through hole should be a lot bigger

• [x] PCB tested

• [ ] Borrow 3D printer

• [ ] Design a casing

[dymnz]

[dymnz]

PCB design sent for manufacturing. Expected arrival before 4/25

[dymnz]

[dymnz]

The gain controlling resistor on the AED is now 2k ohm

[dymnz]

[dymnz]

New 4-ch AED+AMP

• Labelled pair 1 ~ 4
• For Inverting Amp.
  • 2/3 w/ Pot. 100k
  • 1/4 w/ Pot. 20k
• AMP. 4 has Inv_add 40kohm changed to 15kohm
• All AED+AMP pair calibrated to have AMP output of 2.5+-2.1V, w/ 100Hz/+-1mV AED input