MEP EP#242: The Heartbeat of Cats and LEDs

MEP EP#242: The Heartbeat of Cats and LEDs

MEP EP#242: The Heartbeat of Cats and LEDs

Parker

  • Battery charger and maintainer died
    • Took all my batteries with it
    • Company is replacing the unit
    • Nothing looks particularly wrong with the PCB Assembly besides it being gross
    • SF1565SG
      • Current Mode PWM Controller
    • FQPF12N60C
      • Fet used in the PWM Controller
    • HT46R004 HolTek MCU
      • Cost Effective?
  • Cat Feeder Unreminder
    • Ordered a breakout board for the AEM10941
    • Super Caps SCCS30B106PRB
      • 10F @ 2.7VDC
    • Solar Panel AM-1816CA
      • 84µA at peak power
      • This is specced at 200lx
    • Will this be enough?
      • LTC2956 draws 0.8μA
      • LEDs at 40μA a piece
      • Total draw when Cat Feed Indicator is on is 40.8μA
      • 5F x (4.5V-3.6V) / 0.0000608 = 74,013 seconds -> 20 and a half hours!

Stephen

  • Magnetics
    • Transformers arrived!
    • Be specific with what you ask for and ask questions. I almost got bit with dimensional issues
  • Diy Tag connect
    • Made a pogo pin test connector
    • Mill-Max 0955-0-15-20-71-14-11-0 Pogo pins with solder cup on back
    • Using FR4 as mechanical supports
    • Designing a Pawl system to clasp the pcb
    • Next Revision
      • Make the landing pads bigger
      • Add something for strain relief
      • Move the pins slightly down for more spring
      • Add more anti rotation pins

Jaksot(448)

EP#8: Bits That Don’t Quit

EP#8: Bits That Don’t Quit

Podcast NotesStephen and Parker do a live discussion on how the digital and analog side of the Super Simple Power Supply will interface with each other. MultiSim has been a huge part in simulating the...

25 Maalis 201639min

EP#7: The Art of Retention Force

EP#7: The Art of Retention Force

Parker has almost finalized the front panel design for the Super Simple Power Supply. Going to have a "VU" meter for how much power it is pulling.Parker is also still looking for a proper encoder that...

18 Maalis 201624min

EP#6: Mythical Transistors

EP#6: Mythical Transistors

Podcast NotesParker is still working on the Super Simple Power Supply. He is designing the front panel. He is considering using some WP1043 Kingbright LEDs.Super Simple Power Supply will have two deci...

11 Maalis 201625min

EP#5: Tilting Tubes

EP#5: Tilting Tubes

Parker ordered all the parts for the SAIM this week. The v-slot rails and brackets from OpenBuild, iES-1706 servos from Leadshine, and 3D printed parts from Shapeways.MacroFab uses 3D printed parts to...

4 Maalis 201647min

EP#4: Linear Effects of Licensing

EP#4: Linear Effects of Licensing

Audio quality of the podcast leveled up! Stephen and Parker went over to The Pharmacy Recording Studio which is run by Josh Moore. He hooked them up with 2 (!) microphones and a nice an acoustically p...

26 Helmi 201617min

EP#3: Liquid Toroidal Electrons

EP#3: Liquid Toroidal Electrons

Stephen and Parker have been testing the main opamp for the OPA541. Stephen wrote a blog post detailing the opamp tests with simulation and real world testing.GitHub link to the repository for the SSP...

19 Helmi 201622min

EP#2: Mechanical MultiSIM Monsters

EP#2: Mechanical MultiSIM Monsters

Stephen continues his work on the Stupid Simple Power Supply (SSPS). He decided to go digital voltage control over analog. Also he has been trying out MultiSIM BLUE by Mouser for circuit simulation. S...

10 Helmi 201620min

EP#1: Opamp-timal Power Supply

EP#1: Opamp-timal Power Supply

Stephen talks about the Stupid Simple Power Supply (SSPS). He designed a OPA541 breakout board for testing. See figure 1.OPA541 Datasheet : Street price of $21.88.Parker brings up that blinky LEDs are...

9 Helmi 201623min

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