Luca's Notes

Assembly Notes

1 min read

C27 is 10nF

C50 is 10nF

R18, 19 are 10k

C9, C11, C12, C13 500nF replaced with 1uF tant

C8 DNP

Changes needed

  1. Pull down on boot0 / PB8 (Or option byte?)

  2. Capacitor couple nRST to ground

  3. Cortex-M debug header (and testpoints)

  4. More decoupling around MCU

  5. Second state current driver: Flip + & -

  6. Capacitive filtering of LD_I_CTRL

  7. PD backwards???

    1. can the LD I chose even work???

  8. Automatic offset control

Current state

  • Pot adjusts TIA gain

  • Enameled wire corrects for second stage of current supply amplifier inputs being swapped

  • Big brown wire is to inject current, bypassing current supply (since it’s output bjt, Q1, is removed)

  • Blue wire is on reset of MCU for programming without power-on reset

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