Smart Medication Dispenser Design

flux

0:00

Work completed
  • Project description updated to “Smart Medication Dispenser Controller – ESP32-Based with Dual Stepper Drivers, DS3231 RTC, Robust 12 V Power Tree, and Comprehensive Sensor/UI Interfaces”.
  • Added major ICs:
  • Added power components:
    • Reverse-polarity protection and TVS diode on the 12 V input
    • 5 V switch-mode buck converter stage
    • SGM2212-3.3XKC3G/TR as U2 for 3.3 V LDO
Tasks not done
  • Creating or saving the mermaid system architecture diagram (star-ground, domains) — you’ll need to supply that diagram manually.
  • Adding the NPN transistor for the buzzer driver.
  • Populating supporting passives:
    • Bulk (100 µF) and high-frequency decoupling caps (0.1 µF, 1 µF)
    • Buck converter inductors
    • I2C pull-ups (4.7 kΩ)
    • Flyback diode for the buzzer
    • RC-debounce footprints for the reed switch (DNP)
  • Adding connectors and headers:
    • 12 V barrel jack and motor (VMOT) connectors
    • I2C, UART, GPIO expansion, programming header, I2C OLED header
  • Wiring nets (power rails, I2C, STEP/DIR, sensors, LEDs, buzzer)
  • Schematic ERC and layout preparation (stackup, board shape, star-ground copper pour)
Success criteria review
  • Complete schematic coverage: ❌ not yet (passives, connectors, net wiring missing)
  • PCB layout (100×80 mm, motor/logic segregation, star-ground, trace widths): ❌ not yet
Next recommended step Add the NPN transistor and flyback diode for the piezo buzzer driver, then proceed with placing all supporting passives in the power subsystem.
104 days

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P1
P2
  • Ground
    Ground
    A common return path for electric current. Commonly known as ground.
    jharwinbarrozo
    20.5M
  • Net Portal
    Net Portal
    Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
    jharwinbarrozo
    43.0M
  • Power Net Portal
    Power Net Portal
    Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #power
    jharwinbarrozo
    11.4M
  • Generic Resistor
    Generic Resistor
    A generic fixed resistor for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0Ω 10Ω 100Ω 1.0kΩ 10kΩ 100kΩ 1.0MΩ 1.1Ω 11Ω 110Ω 1.1kΩ 11kΩ 110kΩ 1.1MΩ 1.2Ω 12Ω 120Ω 1.2kΩ 12kΩ 120kΩ 1.2MΩ 1.3Ω 13Ω 130Ω 1.3kΩ 13kΩ 130kΩ 1.3MΩ 1.5Ω 15Ω 150Ω 1.5kΩ 15kΩ 150kΩ 1.5MΩ 1.6Ω 16Ω 160Ω 1.6kΩ 16kΩ 160kΩ 1.6MΩ 1.8Ω 18Ω 180Ω 1.8KΩ 18kΩ 180kΩ 1.8MΩ 2.0Ω 20Ω 200Ω 2.0kΩ 20kΩ 200kΩ 2.0MΩ 2.2Ω 22Ω 220Ω 2.2kΩ 22kΩ 220kΩ 2.2MΩ 2.4Ω 24Ω 240Ω 2.4kΩ 24kΩ 240kΩ 2.4MΩ 2.7Ω 27Ω 270Ω 2.7kΩ 27kΩ 270kΩ 2.7MΩ 3.0Ω 30Ω 300Ω 3.0KΩ 30KΩ 300KΩ 3.0MΩ 3.3Ω 33Ω 330Ω 3.3kΩ 33kΩ 330kΩ 3.3MΩ 3.6Ω 36Ω 360Ω 3.6kΩ 36kΩ 360kΩ 3.6MΩ 3.9Ω 39Ω 390Ω 3.9kΩ 39kΩ 390kΩ 3.9MΩ 4.3Ω 43Ω 430Ω 4.3kΩ 43KΩ 430KΩ 4.3MΩ 4.7Ω 47Ω 470Ω 4.7kΩ 47kΩ 470kΩ 4.7MΩ 5.1Ω 51Ω 510Ω 5.1kΩ 51kΩ 510kΩ 5.1MΩ 5.6Ω 56Ω 560Ω 5.6kΩ 56kΩ 560kΩ 5.6MΩ 6.2Ω 62Ω 620Ω 6.2kΩ 62KΩ 620KΩ 6.2MΩ 6.8Ω 68Ω 680Ω 6.8kΩ 68kΩ 680kΩ 6.8MΩ 7.5Ω 75Ω 750Ω 7.5kΩ 75kΩ 750kΩ 7.5MΩ 8.2Ω 82Ω 820Ω 8.2kΩ 82kΩ 820kΩ 8.2MΩ 9.1Ω 91Ω 910Ω 9.1kΩ 91kΩ 910kΩ 9.1MΩ #generics #CommonPartsLibrary
    jharwinbarrozo
    1.5M
  • Generic Capacitor
    Generic Capacitor
    A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF 10pF 100pF 1000pF 0.01uF 0.1uF 1.0uF 10uF 100uF 1000uF 10,000uF 1.1pF 11pF 110pF 1100pF 1.2pF 12pF 120pF 1200pF 1.3pF 13pF 130pF 1300pF 1.5pF 15pF 150pF 1500pF 0.015uF 0.15uF 1.5uF 15uF 150uF 1500uF 1.6pF 16pF 160pF 1600pF 1.8pF 18pF 180pF 1800pF 2.0pF 20pF 200pF 2000pF 2.2pF 22pF 20pF 2200pF 0.022uF 0.22uF 2.2uF 22uF 220uF 2200uF 2.4pF 24pF 240pF 2400pF 2.7pF 27pF 270pF 2700pF 3.0pF 30pF 300pF 3000pF 3.3pF 33pF 330pF 3300pF 0.033uF 0.33uF 3.3uF 33uF 330uF 3300uF 3.6pF 36pF 360pF 3600pF 3.9pF 39pF 390pF 3900pF 4.3pF 43pF 430pF 4300pF 4.7pF 47pF 470pF 4700pF 0.047uF 0.47uF 4.7uF 47uF 470uF 4700uF 5.1pF 51pF 510pF 5100pF 5.6pF 56pF 560pF 5600pF 6.2pF 62pF 620pF 6200pF 6.8pF 68pF 680pF 6800pF 0.068uF 0.68uF 6.8uF 68uF 680uF 6800uF 7.5pF 75pF 750pF 7500pF 8.2pF 82pF 820pF 8200pF 9.1pF 91pF 910pF 9100pF #generics #CommonPartsLibrary
    jharwinbarrozo
    1.5M
  • Generic Inductor
    Generic Inductor
    A generic fixed inductor for rapid developing circuit topology. *You can now change the footprint and 3D model at the top level anytime you want. This is the power of #generics
    jharwinbarrozo
    15.5k
  • Terminal
    Terminal
    An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
    natarius
  • RMCF0805JT47K0
    RMCF0805JT47K0
    47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
    jharwinbarrozo
    1.2M
  • 875105359001
    875105359001
    10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
    jharwinbarrozo
    1.2M
  • CTL1206FYW1T
    CTL1206FYW1T
    Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
    jharwinbarrozo
    1.1M
Smart Medication Dispenser Controller – ESP32-Based with Dual Stepper Drivers, DS3231 RTC, Robust 12 V Power Tree, and Comprehensive Sensor/UI Interfaces

Properties

F

Pricing & Availability

Distributor

Qty 1

Arrow

$15.86–$19.31

Digi-Key

$25.82–$49.78

LCSC

$12.96

Mouser

$38.39

TME

$25.60

Verical

$27.58

Assets

3DSMD_01005_0402Metric.step

3DSMD_01005_0402Metric.step

3DSMD_01005_0402Metric
kicad_mod

SMD_1210_3225Metric.kicad_mod

SMD_1210_3225Metric
3DCP_Elec_5x5.4.step

3DCP_Elec_5x5.4.step

3DCP_Elec_5x5.4
kicad_mod

SMD_01005_0402Metric.kicad_mod

SMD_01005_0402Metric
3DSMD_0805_2012Metric.step

3DSMD_0805_2012Metric.step

3DSMD_0805_2012Metric
kicad_mod

CP_Elec_4x5.4.kicad_mod

CP_Elec_4x5.4
3DSMD_3640_9110Metric.step

3DSMD_3640_9110Metric.step

3DSMD_3640_9110Metric
non-polarized-cap

non-polarized-cap

non-polarized-capDefault
3DSMD_2225_5664Metric.step

3DSMD_2225_5664Metric.step

3DSMD_2225_5664Metric
3DSMD_0402_1005Metric.step

3DSMD_0402_1005Metric.step

3DSMD_0402_1005Metric
kicad_mod

SMD_0402_1005Metric.kicad_mod

SMD_0402_1005Metric
3DSMD_1210_3225Metric.step

3DSMD_1210_3225Metric.step

3DSMD_1210_3225Metric
kicad_mod

SMD_1825_4564Metric.kicad_mod

SMD_1825_4564Metric
kicad_mod

SMD_0603_1608Metric.kicad_mod

SMD_0603_1608Metric
kicad_mod

SMD_3640_9110Metric.kicad_mod

SMD_3640_9110Metric
3DCP_Elec_4x5.4.step

3DCP_Elec_4x5.4.step

3DCP_Elec_4x5.4
kicad_mod

CP_Elec_10x10.kicad_mod

CP_Elec_10x10
3DSMD_1812_4532Metric.step

3DSMD_1812_4532Metric.step

3DSMD_1812_4532Metric
kicad_mod

CP_Elec_6.3x5.4.kicad_mod

CP_Elec_6.3x5.4
kicad_mod

SMD_0201_0603Metric.kicad_mod

SMD_0201_0603MetricFootprint
3DCP_Elec_10x10.step

3DCP_Elec_10x10.step

3DCP_Elec_10x10
kicad_mod

CP_Elec_6.3x7.7.kicad_mod

CP_Elec_6.3x7.7
3DCP_Elec_8x10.step

3DCP_Elec_8x10.step

3DCP_Elec_8x10
3DSMD_1825_4564Metric.step

3DSMD_1825_4564Metric.step

3DSMD_1825_4564Metric
kicad_mod

CP_Elec_5x5.4.kicad_mod

CP_Elec_5x5.4
kicad_mod

SMD_1812_4532Metric.kicad_mod

SMD_1812_4532Metric
3DCP_Elec_6.3x7.7.step

3DCP_Elec_6.3x7.7.step

3DCP_Elec_6.3x7.7
kicad_mod

SMD_2225_5664Metric.kicad_mod

SMD_2225_5664Metric
3DSMD_0603_1608Metric.step

3DSMD_0603_1608Metric.step

3DSMD_0603_1608Metric
3DSMD_1206_3216Metric.step

3DSMD_1206_3216Metric.step

3DSMD_1206_3216Metric
3DSMD_0201_0603Metric.step

3DSMD_0201_0603Metric.step

3DSMD_0201_0603Metric
kicad_mod

SMD_0805_2012Metric.kicad_mod

SMD_0805_2012Metric
kicad_mod

SMD_2220_5650Metric.kicad_mod

SMD_2220_5650Metric
kicad_mod

CP_Elec_8x10.kicad_mod

CP_Elec_8x10
kicad_mod

SMD_1206_3216Metric.kicad_mod

SMD_1206_3216Metric
3DCP_Elec_8x6.2.step

3DCP_Elec_8x6.2.step

3DCP_Elec_8x6.2
3DSMD_2220_5650Metric.step

3DSMD_2220_5650Metric.step

3DSMD_2220_5650Metric
polarized-cap

polarized-cap

polarized-cap
3DCP_Elec_6.3x5.4.step

3DCP_Elec_6.3x5.4.step

3DCP_Elec_6.3x5.4
kicad_mod

CP_Elec_8x6.2.kicad_mod

CP_Elec_8x6.2

Controls