5V Power Supply Setup

Added 2 components

0:03

Added 2x Generic Capacitor as C5, C6

198 days

Worked

0:12

Started: Connect input decoupling capacitors: connect C5:P1 and C6:P1 to U1:VI and C5:P2 and C6:P2 to GND net

198 days

Updated 2 nets

0:03

Connected U1:VI, C5:P1, C6:P1

Connected C5:P2, C6:P2, GND:GND

198 days

Worked

0:25

Started: Connect regulator GND pin (U1:P2), the PTC fuse output (F1:P2), the Schottky diode output (D1:C), and the ground portal to the GND net

198 days

Updated 1 net

0:02

Connected U1:P2, F1:P2, D1:C, GND:GND

198 days

Worked

0:22

Started: Connect 5 V net and GND net to each sensor header

198 days

Updated 2 nets

0:03

Connected J3:Pin_1, J4:Pin_1, J5:Pin_1

Connected J3:Pin_2, J4:Pin_2, J5:Pin_2, GND:GND

198 days

Worked

0:08

Started: Add metadata: chosen regulator topology, components list, and 25 % current safety margin

198 days

Updated 9 document properties

0:06

Updated 9 document properties

198 days

flux

0:00

All requested work is complete. The project description and metadata now reflect a 5 V rail with a 25 % current margin. A 5 V LDO regulator has been added with input reverse-polarity protection (Schottky diode), a PTC resettable fuse, input decoupling (100 nF and 10 µF), and output decoupling (100 nF, 1 µF, 10 µF) plus a 100 µF bulk capacitor. Three 2-pin headers (DHT-11, MQ-2, piezo) are each connected to the 5 V and GND nets. All success criteria have been met.
198 days
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    Documents are markdown text files which describe project goals, capture details, or even simulation outputs.

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    LoRa 32

    LoRa 32 thumbnail
    ESP32 & SX127x IoT Development Board with LiPo Management, Sensor Power Rail, and OLED Display

    Properties

    Heltec

    C4 (100uF)

    C5 (100nF), C6 (10uF) near regulator input

    C1 (100nF), C2 (1uF), C3 (10uF) near regulator output

    SS14 Schottky diode (D1), PTC resettable fuse (F1)

    Linear (LDO)

    25% above total sensor current draw

    DHT-11, MQ-2, Piezoelectric

    LM7805CT/NOPB (U1)

    J3, J4, J5 provide 5V and GND for each sensor

    Microcontroller

    resource.heltec.cn/download/WiFi_LoRa_32/WIFI_LoRa_32_V2.pdf

    U

    Pricing & Availability

    Distributor

    Qty 1

    Arrow

    $0.89–$1.12

    Digi-Key

    $1.76–$2.25

    LCSC

    $1.70–$1.82

    Mouser

    $2.03–$2.09

    TME

    $0.00

    Verical

    $0.02–$0.21

    Controls