5V Power Supply Setup

flux

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

Worked

0:22

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

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  • Connected J3:Pin_1, J4:Pin_1, J5:Pin_1
  • Connected J3:Pin_2, J4:Pin_2, J5:Pin_2, GND:GND

Worked

0:08

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

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Updated 9 document properties

flux

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.
Vext
33
17
4
16
13
TX
37
34
5V
15
12
18
36
GND
3V3
GND
2
23
RST
38
RX
Vext
RST
32
3V3
25
27
5
35
21
26
14
19
22
39
J2
J1
C1
Capacitance
Capacitance
C2
Capacitance
Capacitance
C5
Capacitance
Capacitance
U1
C4
Capacitance
Capacitance
C6
Capacitance
Capacitance
D1
C3
Capacitance
Capacitance

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Documents

    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

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    Qty 1

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    TME

    $0.00

    Verical

    $0.02–$0.21

    Controls