Identifying SMD Component

irflashrex

Image

194 days

flux

2:01

Accessing knowledge base.

That top mark “7002” on a 3‑pin SMD package is very likely a 2N7002 N‑channel MOSFET (SOT‑23), commonly used for small‑signal switching and level‑shifting.

How to verify quickly:

Gate will be the pin that’s isolated (very high resistance to the others).
In diode‑test mode you’ll read a body‑diode between the other two pins; the remaining pin is the gate. Typical pinout for 2N7002 is 1=Gate, 2=Source, 3=Drain (confirm with your board traces).

Want me to help pick a drop‑in replacement or check how it’s used in your circuit?

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194 days

list all ESP-01 pins in a table format. For each pin provide its pin number, pin...

irflashrex

@copilot list all ESP-01 pins in a table format. For each pin provide its pin number, pin name and function.

copilot

Here's a table listing the pins for the ESP-01 module, along with their pin numbers, names, and functions:

Table

Pin Number	Pin Name	Function
1	GND	Ground
2	IO2	GPIO2, U1_TXD, I2C_SDA, 12SO_WS
3	IO0	GPIO0, HSPI_MISO, I2SI_DATA
4	RXD	GPIO3, I2SO_DATA
5	TXD	GPIO1
6	EN	Chip Enabled Pin, Active High
7	RST	Reset Pin, Active Low
8	VCC	Supply Voltage

Would you like more details on any specific functionalities or application tips for these pins?

irflashrex

do i need pin 2 to be high in normal operation?

copilot

In normal operation, you typically want GPIO2 (Pin 2) on the ESP-01 module to be pulled high. This is generally important for successful booting when the ESP8266 is powered on or reset. Here are some details:

GPIO2: It should be connected to VCC (pulled high) for the ESP-01 to boot properly into the normal operating mode, also known as Flash mode.

Doing this ensures that the device doesn't enter a different boot mode, which could interfere with normal operations.

irflashrex

do i need pin 3 to be high in normal operation?

copilot

Yes, for normal operation of the ESP-01, you should also ensure that GPIO0 (Pin 3) is pulled high. Here’s why:

GPIO0: If GPIO0 is pulled high during power-up or reset, the ESP8266 boots into standard Flash mode, allowing the device to execute the firmware stored in its flash memory.

To enter the programming mode (to upload firmware), GPIO0 needs to be pulled low during reset. However, for regular operation, keeping it high ensures that the device boots correctly into normal operational mode.

irflashrex

is there any resistance needed for pins 2 or 3?

copilot

It's a good practice to use pull-up resistors to ensure that GPIO2 and GPIO0 are held high. A standard value for pull-up resistors in this context is typically around 10 kΩ. Here’s a bit more detail:

GPIO2 and GPIO0: Connect a 10 kΩ resistor between each GPIO pin and the VCC. This pull-up resistor helps maintain the pin in a high state and prevents it from floating, which might lead to unpredictable behavior.

These pull-up resistors are especially useful during power-up and reset to ensure reliable operation. Feel free to adjust the resistor values based on your specific design requirements, such as power consumption or signal integrity.

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3.3vdc

er-cd

reset

cd-dr

cs-rs

rst

Reviews

Ground
A common return path for electric current. Commonly known as ground.
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20.5M
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
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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
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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
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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
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15.8k
Terminal
An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
natarius
RMCF0805JT47K0
47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
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1.2M
875105359001
10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
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1.2M
CTL1206FYW1T
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1.1M

Project Name

[Example] ESP32 Reference Design

Description

An example development and reference design for the ESP32 microcontroller.

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor	Qty 1
Arrow	$1.59–$2.44
Digi-Key	$2.31–$3.87
LCSC	$2.28–$2.37
Mouser	$2.56
Verical	$0.79–$1.77

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irflashrex / [Example] ESP32 Reference Design

Schematic