ESP8266 Buzzer Control Project

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Here are solid Flux-library options for a 5 V active buzzer (through-hole preferred) and a small NPN transistor to drive it from an ESP8266 GPIO.
5 V Active Buzzers (Through-hole)

Table

PartUIDMount/PackageKey SpecsLinkDatasheet
CMI-1275C-0501fd17030-8af1-419d-a48a-252d99dd0a69Through Hole, radialActive, 5 V, 3.1 kHz, 83 dB @ 10 cm, 30 mA typCMI-1275C-050Datasheet
TMB12A055e4c0f09-e531-4878-a97c-8569476fbfdaThrough Hole, 12 mmActive, 5 V, 2.7 kHz, 85 dB @ 10 cmTMB12A05Datasheet
HNB09A05547be13b-18f5-43a9-a37b-b5d64dcb0f1eThrough Hole, 9 mmActive, 5 V, 3 kHz, 85 dBHNB09A05Datasheet
Small NPN Transistors (for low-side switching)

Table

PartUIDMount/PackageKey SpecsLinkDatasheet
2N3904da065ab7-7a63-49a8-bc1e-6e8ab9a173cbTO-92 (Through Hole)NPN, Vceo 40 V, Ic 200 mA2N3904Datasheet
PN2222A00b74a9c-c52d-42c4-9a23-fd332ec29ce1TO-92 (Through Hole)NPN, Vceo ~40 V, Ic up to 600 mAPN2222ADatasheet
MMBT3904LT1G (MMBT3904)c89e6e33-04cc-4c16-9a33-027ec5b38babSOT-23 (SMD)NPN, Vceo 40 V, Ic 200 mAMMBT3904LT1GDatasheet
Recommendations
  • Buzzer: CMI-1275C-050 is a great through-hole 5 V active choice with well-defined current (30 mA typ) and loudness.
  • Transistor: 2N3904 (TO-92) is sufficient and common; PN2222A provides extra current margin if desired.
Tell me which buzzer and transistor you want, and I can add them to your project.
Pick CMI buzzer + 2N3904
Choose 12mm buzzer + PN2222A
Prefer SOT-23 transistor
Need lower-current buzzer
Check GPIO drive assumptions
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Documents

    Documents are markdown text files which describe project goals, capture details, or even simulation outputs.

    Assets

    wemosd1mini-template.png

    wemosd1mini-template.png

    wemosd1mini-templateThumbnail

    Wifi Water Level Monitor

    Wifi Water Level Monitor thumbnail
    Here's a template for the popular ESP-8266EX microcontroller board, wemos D1 mini.
    A mini wifi board with 4MB flash based on ESP-8266EX #wemos #esp8266 #project-template #template

    Properties

    Properties describe core aspects of the project.

    Pricing & Availability

    Distributor

    Qty 1

    Arrow

    $0.27

    Digi-Key

    $2.89

    LCSC

    $0.20

    Mouser

    $6.55

    Verical

    $0.23

    Controls

    New control