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ESP8266 Buzzer Control Project

flux

3:24

Creating parts queries.

Using agentic mode for queries.

Ensuring component linking.

Preparing component queries.

Accessing knowledge base.

Searching for components.

Searching library for: "Find a 5 V active buzzer (self-driven, no external PWM required) for microcontroller projects. Through-hole (radial) package preferred, but SMD acceptable if needed. Rated for 5 V DC operation, continuous tone, typical current <= 30 mA. Suitable to be switched on/off via low-side NPN transistor from a 3.3 V ESP8266 GPIO."

Searching library for: "Find a small-signal NPN BJT suitable for low-side switching of a 5 V active buzzer from a 3.3 V ESP8266 GPIO. Requirements: Vceo >= 30 V, Ic >= 100 mA, available in TO-92 (through-hole) or SOT-23 (SMD). Common parts like 2N3904/PN2222A or equivalents acceptable. Prefer widely available parts."

Creating search plan for: "Find a 5 V active buzzer (self-driven, no external PWM required) for microcontroller projects. Through-hole (radial) package preferred, but SMD acceptable if needed. Rated for 5 V DC operation, continuous tone, typical current <= 30 mA. Suitable to be switched on/off via low-side NPN transistor from a 3.3 V ESP8266 GPIO. --- Suggested search options: fieldCategories: ["core","type","manufacturer","specifications","availability","packaging"] hitsPerPage: 20"

Creating search plan for: "Find a small-signal NPN BJT suitable for low-side switching of a 5 V active buzzer from a 3.3 V ESP8266 GPIO. Requirements: Vceo >= 30 V, Ic >= 100 mA, available in TO-92 (through-hole) or SOT-23 (SMD). Common parts like 2N3904/PN2222A or equivalents acceptable. Prefer widely available parts. --- Suggested search options: fieldCategories: ["core","type","manufacturer","specifications","availability","packaging"] hitsPerPage: 20"

Searching: "Small-signal NPN transistor, Vceo >= 30 V, Ic >= 100 mA, low-side switch for 5 V buzzer driven by 3.3 V GPIO, TO-92 or SOT-23 package preferred"

Searching: "General purpose NPN BJT 30 V 100 mA SOT-23 TO-92 through-hole or SMD"

Found 79 results.

Searching: "Find a small-signal NPN BJT suitable for low-side switching of a 5 V active buzzer from a 3.3 V ESP8266 GPIO. Requirements: Vceo >= 30 V, Ic >= 100 mA, available in TO-92 (through-hole) or SOT-23 (SMD). Common parts like 2N3904/PN2222A or equivalents acceptable. Prefer widely available parts. --- Suggested search options: fieldCategories: ["core","type","manufacturer","specifications","availability","packaging"] hitsPerPage: 20"

Searching: "5 V self-driven active buzzer, continuous tone, through-hole radial preferred, typical current <= 30 mA, switchable by low-side NPN from 3.3 V MCU"

Searching: "5 V active buzzer self-driven continuous tone, typical current <= 30 mA, switchable by low-side transistor (include SMD and through-hole)"

Found 31 results.

Searching: "Find a 5 V active buzzer (self-driven, no external PWM required) for microcontroller projects. Through-hole (radial) package preferred, but SMD acceptable if needed. Rated for 5 V DC operation, continuous tone, typical current <= 30 mA. Suitable to be switched on/off via low-side NPN transistor from a 3.3 V ESP8266 GPIO. --- Suggested search options: fieldCategories: ["core","type","manufacturer","specifications","availability","packaging"] hitsPerPage: 20"

Finished searching for components.

Focusing on user request.

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
73 days
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Reviews

  • 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 ideal for rapid circuit topology development. Its footprint automatically adapts based on the selected package case code—supporting 0402, 0603, 0805, 1203, and many other standard SMD packages, as well as axial horizontal and vertical configurations. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0 ohm, 10 ohm, 100 ohm, 1.0k ohm, 10k ohm, 100k ohm, 1.0M ohm 1.1 ohm, 11 ohm, 110 ohm, 1.1k ohm, 11k ohm, 110k ohm, 1.1M ohm 1.2 ohm, 12 ohm, 120 ohm, 1.2k ohm, 12k ohm, 120k ohm, 1.2M ohm 1.3 ohm, 13 ohm, 130 ohm, 1.3k ohm, 13k ohm, 130k ohm, 1.3M ohm 1.5 ohm, 15 ohm, 150 ohm, 1.5k ohm, 15k ohm, 150k ohm, 1.5M ohm 1.6 ohm, 16 ohm, 160 ohm, 1.6k ohm, 16k ohm, 160k ohm, 1.6M ohm 1.8 ohm, 18 ohm, 180 ohm, 1.8K ohm, 18k ohm, 180k ohm, 1.8M ohm 2.0 ohm, 20 ohm, 200 ohm, 2.0k ohm, 20k ohm, 200k ohm, 2.0M ohm 2.2 ohm, 22 ohm, 220 ohm, 2.2k ohm, 22k ohm, 220k ohm, 2.2M ohm 2.4 ohm, 24 ohm, 240 ohm, 2.4k ohm, 24k ohm, 240k ohm, 2.4M ohm 2.7 ohm, 27 ohm, 270 ohm, 2.7k ohm, 27k ohm, 270k ohm, 2.7M ohm 3.0 ohm, 30 ohm, 300 ohm, 3.0K ohm, 30K ohm, 300K ohm, 3.0M ohm 3.3 ohm, 33 ohm, 330 ohm, 3.3k ohm, 33k ohm, 330k ohm, 3.3M ohm 3.6 ohm, 36 ohm, 360 ohm, 3.6k ohm, 36k ohm, 360k ohm, 3.6M ohm 3.9 ohm, 39 ohm, 390 ohm, 3.9k ohm, 39k ohm, 390k ohm, 3.9M ohm 4.3 ohm, 43 ohm, 430 ohm, 4.3k ohm, 43K ohm, 430K ohm, 4.3M ohm 4.7 ohm, 47 ohm, 470 ohm, 4.7k ohm, 47k ohm, 470k ohm, 4.7M ohm 5.1 ohm, 51 ohm, 510 ohm, 5.1k ohm, 51k ohm, 510k ohm, 5.1M ohm 5.6 ohm, 56 ohm, 560 ohm, 5.6k ohm, 56k ohm, 560k ohm, 5.6M ohm 6.2 ohm, 62 ohm, 620 ohm, 6.2k ohm, 62K ohm, 620K ohm, 6.2M ohm 6.8 ohm, 68 ohm, 680 ohm, 6.8k ohm, 68k ohm, 680k ohm, 6.8M ohm 7.5 ohm, 75 ohm, 750 ohm, 7.5k ohm, 75k ohm, 750k ohm, 7.5M ohm 8.2 ohm, 82 ohm, 820 ohm, 8.2k ohm, 82k ohm, 820k ohm, 8.2M ohm 9.1 ohm, 91 ohm, 910 ohm, 9.1k ohm, 91k ohm, 910k ohm, 9.1M ohm #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, 10000uF 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, 220pF, 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 suitable for rapid circuit topology development. The footprint automatically adapts based on the selected package, supporting standard SMD sizes (e.g., 0402, 0603, 0805) as well as well-known inductor packages such as SDR1806, PA4320, SRN6028, and SRR1260. Standard inductor values: 1.0 nH, 10 nH, 100 nH, 1.0 µH, 10 µH, 100 µH, 1.0 mH 1.2 nH, 12 nH, 120 nH, 1.2 µH, 12 µH, 120 µH, 1.2 mH 1.5 nH, 15 nH, 150 nH, 1.5 µH, 15 µH, 150 µH, 1.5 mH 1.8 nH, 18 nH, 180 nH, 1.8 µH, 18 µH, 180 µH, 1.8 mH 2.2 nH, 22 nH, 220 nH, 2.2 µH, 22 µH, 220 µH, 2.2 mH 2.7 nH, 27 nH, 270 nH, 2.7 µH, 27 µH, 270 µH, 2.7 mH 3.3 nH, 33 nH, 330 nH, 3.3 µH, 33 µH, 330 µH, 3.3 mH 3.9 nH, 39 nH, 390 nH, 3.9 µH, 39 µH, 390 µH, 3.9 mH 4.7 nH, 47 nH, 470 nH, 4.7 µH, 47 µH, 470 µH, 4.7 mH 5.6 nH, 56 nH, 560 nH, 5.6 µH, 56 µH, 560 µH, 5.6 mH 6.8 nH, 68 nH, 680 nH, 6.8 µH, 68 µH, 680 µH, 6.8 mH 8.2 nH, 82 nH, 820 nH, 8.2 µH, 82 µH, 820 µH, 8.2 mH #generics #CommonPartsLibrary
    jharwinbarrozo
    15.8k
  • 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
    General Purpose Thick Film Standard Power and High-Power Chip Resistor 47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film Features: - RMCF – standard power ratings - RMCP – high power ratings - Nickel barrier terminations standard - Power derating from 100% at 70ºC to zero at +155ºC - RoHS compliant, REACH compliant, and halogen free - AEC-Q200 compliant
    jharwinbarrozo
    1.2M
  • 875105359001
    875105359001
    10 µF 16 V Aluminum - Polymer Capacitors Radial, Can - SMD 30mOhm 2000 Hrs @ 105°C #commonpartslibrary #capacitor #aluminumpolymer #radialcan
    jharwinbarrozo
    1.2M
  • CTL1206FYW1T
    CTL1206FYW1T
    Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric)
    jharwinbarrozo
    1.1M

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

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