MEP EP#101: Playing the New Doom

Podcast Notes

• Stephen
  • DSO138 Oscilloscope
    • Comes as a kit (just through hole) but can be purchased assembled
    • The “true” version can be had for ~$30
      • Counterfeit versions exist for $4
    • Open Source Firmware!
    • Analog bandwidth: 0 – 200KHz
    • Sampling rate: 1Msps max
    • Sensitivity: 10mV/Div – 5V/Div
    • Sensitivity error: < 5%
    • Vertical resolution: 12-bit
    • Timebase: 10us/Div – 500s/Div
    • Record length: 1024 points
    • Built-in 1KHz/3.3V test signal
    • Waveform frozen (HOLD) function available Save/recall waveform
    • In short – it’ll getcha through college

• Parker
  • Pinheck REV 8 is routed
    • Finishing silkscreen after the podcast
    • Placing an order for prototypes this week!
    • Switched from standard SD card to microSD card
  • Next board is the I2S Audio Amp
    • TAS5755M
    • Working with the  TAS5755MEVM
      • So far it kinda works
    • Need to generate a clock for it?

• R.F.O.
  • Making A Classic Chip From Discretes
    • Motorola MC1466 – voltage regulator
    • Stephen has made opamps with Discretes before – that was a project we finished!
      • MacroFab EP11
  • Apple says sorry
    • iPhone Batteries and Performance
  • Zapp from the Slack Channel asks “If my MCU has internal pullups on an IO why would they recommend additional pull up resistors externally?”

• MacroFab Hiring!
  • Apply here

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