Symbols

Schematic symbols from the KiCad library — interactive SymView viewers with pin highlighting and electrical type info. 101 symbols.

1N4148
Diode2 pins
1N4148 DO-35 · Diode Fast switching diode — 100V, 200mA, 4ns recovery, the universal signal diode
1N5819
Diode2 pins
1N5819 DO-41 · Diode Schottky barrier diode — 40V, 1A, 0.6V forward drop
24LC256
Memory8 pins
24LC256 DIP-8 / SOIC-8 · Memory_EEPROM 256Kbit I2C EEPROM — 32KB, 400kHz, 1M erase cycles
4017
Logic16 pins
4017 DIP-16 / SOIC-16 · 4xxx Decade counter/divider — 10 decoded outputs, Johnson counter
6N137
Isolator8 pins
6N137 DIP-8 · Isolator High-speed optocoupler — 10Mbps, logic gate output, 5kV isolation
74HC00
Logic14 pins
74HC00 DIP-14 / SOIC-14 · 74xx Quad 2-input NAND gate — the universal logic gate
74HC04
Logic14 pins
74HC04 DIP-14 / SOIC-14 · 74xx Hex inverter — six independent NOT gates
74HC138
Logic16 pins
74HC138 DIP-16 / SOIC-16 · 74xx 3-to-8 line decoder/demultiplexer — active-low outputs
74HC164
Logic14 pins
74HC164 DIP-14 / SOIC-14 · 74xx 8-bit serial-in parallel-out shift register — simple GPIO expansion
74HC245
Logic20 pins
74HC245 DIP-20 / SOIC-20 · 74xx Octal bus transceiver — bidirectional, 3-state, level shifting
74HC4051
Analog Switch16 pins
74HC4051 DIP-16 / TSSOP-16 · 74xx 8-channel analog multiplexer — high-speed CMOS version
74HC595
Logic16 pins
74HC595 DIP-16 / SOIC-16 · 74xx 8-bit shift register with output latches — serial-in, parallel-out
74HC74
Logic14 pins
74HC74 DIP-14 / SOIC-14 · 74xx Dual D flip-flop — positive-edge triggered, preset and clear
A4988 (Pololu Breakout)
Driver16 pins
A4988 (Pololu Breakout) Module (Pololu breakout) · Driver_Motor Stepper motor driver — 1/16 microstepping, 2A, 35V
ACS712xLCTR-05B
Sensor8 pins
ACS712xLCTR-05B SOIC-8 · Sensor_Current Hall-effect current sensor — +/-5A, analog output, galvanic isolation
AD620
Instrumentation Amp8 pins
AD620 DIP-8 / SOIC-8 · Amplifier_Instrumentation Low-cost instrumentation amplifier — single resistor gain set, 120kHz
ADS1115IDGS
ADC10 pins
ADS1115IDGS MSOP-10 · Analog_ADC 16-bit I2C ADC — 4-channel, PGA, 860sps, precision measurement
AMS1117-3.3
Voltage Regulator3 pins
AMS1117-3.3 SOT-223 · Regulator_Linear 3.3V LDO regulator — 1A output, low dropout, SOT-223
AO3400A
MOSFET3 pins
AO3400A SOT-23 · Transistor_FET N-channel MOSFET — 30V, 5.7A, logic-level gate, SOT-23 package
AP2112K-3.3
Voltage Regulator5 pins
AP2112K-3.3 SOT-23-5 · Regulator_Linear 600mA LDO — low noise, high PSRR, popular on modern dev boards
APDS-9960
Sensor8 pins
APDS-9960 Package (3.94x2.36mm) · Sensor Gesture + proximity + ambient light + color sensor — I2C, all-in-one
ATmega2560-16A
Microcontroller100 pins
ATmega2560-16A TQFP-100 · MCU_Microchip_ATmega 8-bit AVR mega — 256KB flash, 86 GPIO, the Arduino Mega MCU
ATmega328P-A
Microcontroller32 pins
ATmega328P-A TQFP-32 · MCU_Microchip_ATmega 8-bit AVR microcontroller — the heart of the Arduino Uno, 32KB flash, 23 GPIO, TQFP-32
ATtiny85-20S
Microcontroller8 pins
ATtiny85-20S SOIC-8 · MCU_Microchip_ATtiny 8-bit AVR — 8KB flash, 6 I/O pins, the minimalist MCU
BC547
Transistor3 pins
BC547 TO-92 · Transistor_BJT NPN general-purpose transistor — 100mA, 45V, the European standard BJT
BME280
Sensor8 pins
BME280 LGA-8 (2.5x2.5mm) · Sensor Environmental sensor — temperature, humidity, pressure, I2C/SPI
BQ24074RGT
Power Management16 pins
BQ24074RGT QFN-16 · Battery_Management Li-Ion charger with power path — 1.5A, USB-compatible, solar input
BSS138
MOSFET3 pins
BSS138 SOT-23 · Transistor_FET N-channel MOSFET — 50V, 200mA, the I2C level-shifter MOSFET
CD4051B
Analog Switch16 pins
CD4051B DIP-16 / SOIC-16 · Analog_Switch Single 8-channel analog multiplexer/demux — bilateral switch
CH340G
Interface16 pins
CH340G SOP-16 · Interface_USB USB-to-serial bridge — low-cost alternative to FTDI
CP2102N-A02-GQFN28
Interface28 pins
CP2102N-A02-GQFN28 QFN-28 · Interface_USB USB-to-UART bridge — USB 2.0 Full Speed, up to 3Mbps, QFN-28
DHT11
Sensor4 pins
DHT11 SIP-4 · Sensor Digital temperature & humidity sensor — single-wire, low-cost
DRV8825 (Pololu Breakout)
Driver16 pins
DRV8825 (Pololu Breakout) Module (Pololu breakout) · Driver_Motor Stepper motor driver — 1/32 microstepping, 2.5A, 45V
DS18B20
Sensor3 pins
DS18B20 TO-92 · Sensor_Temperature 1-Wire digital temperature sensor — ±0.5C, parasitic power
DS3231M
Timer8 pins
DS3231M SOIC-8 · Timer_RTC MEMS real-time clock — ±5ppm accuracy, I2C, battery-backed
ENC28J60
Interface44 pins
ENC28J60 QFN-44 · Interface_Ethernet 10Base-T Ethernet controller — SPI, 8KB buffer, low-cost
ESP32-S3-WROOM-1
RF Module41 pins
ESP32-S3-WROOM-1 Module (18x25.5mm) · RF_Module Wi-Fi + BLE 5.0 module — AI acceleration, USB OTG, 240MHz dual-core
ESP32-WROOM-32E
RF Module38 pins
ESP32-WROOM-32E Module (18x25.5mm) · RF_Module Wi-Fi + Bluetooth dual-mode module — 240MHz dual-core, 4MB flash
FT232RL
Interface28 pins
FT232RL SSOP-28 · Interface_USB USB-to-UART bridge — FTDI classic, USB 2.0 Full Speed, SSOP-28
ICM-20948
Sensor24 pins
ICM-20948 QFN-24 · Sensor_Motion 9-axis IMU — 3-axis gyro + accel + mag, I2C/SPI, DMP
INA219AxD
Sensor8 pins
INA219AxD SOIC-8 · Sensor_Energy High-side current/power monitor — I2C, 26V, bidirectional
IRF540N
MOSFET3 pins
IRF540N TO-220 · Transistor_FET N-channel power MOSFET — 100V, 33A, logic-level, TO-220
IRF9540N
MOSFET3 pins
IRF9540N TO-220 · Transistor_FET P-channel power MOSFET — 100V, 23A, high-side switching
IRLZ44N
MOSFET3 pins
IRLZ44N TO-220 · Transistor_FET Logic-level N-channel MOSFET — 55V, 47A, 22mOhm, direct 5V/3.3V drive
L298N
Driver15 pins
L298N Multiwatt-15 · Driver_Motor Dual full-bridge motor driver — 2A/ch, the classic H-bridge IC
LIS3DH
Sensor16 pins
LIS3DH LGA-16 · Sensor_Motion 3-axis accelerometer — ultra-low-power, I2C/SPI, +/-16g, FIFO
LM2596S-5
Voltage Regulator5 pins
LM2596S-5 D2PAK-5 · Regulator_Switching Simple 5V step-down switching regulator — 3A, 150kHz
LM317
Voltage Regulator3 pins
LM317 TO-220 · Regulator_Linear Adjustable linear voltage regulator — 1.2V to 37V, 1.5A, TO-220
LM324
Op-Amp14 pins
LM324 DIP-14 / SOIC-14 · Amplifier_Operational Quad operational amplifier — single-supply, low-power, industry standard
LM339
Comparator14 pins
LM339 DIP-14 / SOIC-14 · Comparator Quad voltage comparator — open-collector, single or dual supply
LM35-D
Sensor8 pins
LM35-D SOIC-8 · Sensor_Temperature Precision analog temperature sensor — 10mV/C, linear, no calibration
LM358
Op-Amp8 pins
LM358 DIP-8 / SOIC-8 · Amplifier_Operational Dual operational amplifier — single-supply, low-power, industry standard
LM386
Audio8 pins
LM386 DIP-8 · Amplifier_Audio Low-voltage audio power amplifier — 250mW, battery operation
LM393
Comparator8 pins
LM393 DIP-8 / SOIC-8 · Comparator Dual voltage comparator — the go-to comparator, open-collector output
LM4040DBZ-5
Reference3 pins
LM4040DBZ-5 SOT-23 · Reference_Voltage Precision shunt voltage reference — 5.0V, 0.1% accuracy, SOT-23
LM7805
Voltage Regulator3 pins
LM7805 TO-220 · Regulator_Linear Classic 5V linear voltage regulator — 1.5A output, TO-220 package
MAX232
Interface16 pins
MAX232 DIP-16 / SOIC-16 · Interface_UART Dual RS-232 transceiver — charge pump generates ±10V from 5V
MAX3232
Interface16 pins
MAX3232 DIP-16 / SOIC-16 · Interface_UART True RS-232 transceiver — 3.3V/5V compatible, charge pump
MAX485E
Interface8 pins
MAX485E DIP-8 / SOIC-8 · Interface_UART RS-485/RS-422 transceiver — half-duplex, slew-rate limited
MAX7219
LED Driver24 pins
MAX7219 DIP-24 / SOIC-24 · Driver_LED LED display driver — 8 digits of 7-segment or 64 LEDs, SPI
MC34063AD
Voltage Regulator8 pins
MC34063AD SOIC-8 · Regulator_Switching Classic DC-DC converter — buck/boost/inverting, 1.5A, the vintage workhorse
MCP1700
Voltage Regulator3 pins
MCP1700 SOT-23 · Regulator_Linear Ultra-low quiescent LDO — 1.6uA Iq, 250mA, CMOS, SOT-23
MCP23017
Interface28 pins
MCP23017 SOIC-28 · Interface_Expansion 16-bit I2C GPIO expander — interrupt output, 1.7MHz I2C
MCP2515-xSO
Interface18 pins
MCP2515-xSO SOIC-18 · Interface_CAN_LIN Stand-alone CAN controller — SPI interface, CAN 2.0B, SOIC-18
MCP2551-I-P
Interface8 pins
MCP2551-I-P DIP-8 · Interface_CAN_LIN High-speed CAN transceiver — 1Mbps, 5V, slope control
MCP3008
ADC16 pins
MCP3008 DIP-16 / SOIC-16 · Analog_ADC 8-channel 10-bit SPI ADC — 200ksps, the Raspberry Pi ADC
MCP4725
DAC6 pins
MCP4725 SOT-23-6 · Analog_DAC 12-bit I2C DAC — single-channel, EEPROM, SOT-23-6
MPU-6050
Sensor24 pins
MPU-6050 QFN-24 · Sensor_Motion 6-axis IMU — 3-axis gyro + 3-axis accelerometer, I2C, DMP
MSP430F2013IN
Microcontroller14 pins
MSP430F2013IN DIP-14 · MCU_Texas_MSP430 Ultra-low-power 16-bit MCU — 0.5uA standby, 16-bit Sigma-Delta ADC
NE555D
Timer8 pins
NE555D SOIC-8 · Timer The legendary 555 timer IC — monostable, astable, and PWM in one chip
NXP S32K344
MCU_Automotive172 pins
NXP S32K344 HDQFP-172 · MCU_NXP_S32K3 ASIL D Lockstep Core Arm Cortex-M7 4MB Automotive MCU, 160 MHz, CAN-FD, Ethernet, ADC. 172-pin HDQFP package.
OPA2134
Op-Amp8 pins
OPA2134 DIP-8 / SOIC-8 · Amplifier_Operational Dual JFET op-amp — SoundPlus audio grade, 8MHz, low distortion
PAM8403D
Audio16 pins
PAM8403D SOP-16 · Amplifier_Audio 3W stereo Class-D audio amplifier — filterless, 90% efficiency
PC817
Isolator4 pins
PC817 DIP-4 · Isolator General-purpose optocoupler — phototransistor output, 5kV isolation
PCF8574TS
Interface20 pins
PCF8574TS SSOP-20 · Interface_Expansion 8-bit I2C I/O expander — quasi-bidirectional ports, interrupt
PIC16F877A-IP
Microcontroller40 pins
PIC16F877A-IP DIP-40 · MCU_Microchip_PIC16 8-bit PIC — 14KB flash, 33 I/O, the classic Microchip MCU
PIC18F4550-IP
Microcontroller40 pins
PIC18F4550-IP DIP-40 · MCU_Microchip_PIC18 8-bit PIC with USB — native USB 2.0, 32KB flash, 35 I/O
PN2222A
Transistor3 pins
PN2222A TO-92 · Transistor_BJT NPN general-purpose transistor — 600mA, 40V, the universal BJT
RP2040
Microcontroller56 pins
RP2040 QFN-56 · MCU_RaspberryPi Dual-core ARM Cortex-M0+ — Raspberry Pi silicon, 264KB SRAM, PIO, USB
SN65HVD230
Interface8 pins
SN65HVD230 SOIC-8 · Interface_CAN_LIN 3.3V CAN bus transceiver — 1Mbps, low-power standby, SOIC-8
STM32F030F4Px
Microcontroller20 pins
STM32F030F4Px TSSOP-20 · MCU_ST_STM32F0 ARM Cortex-M0 — cheapest STM32, 16KB flash, 20-pin, under $1
STM32F103C8Tx
Microcontroller48 pins
STM32F103C8Tx LQFP-48 · MCU_ST_STM32F1 ARM Cortex-M3 microcontroller — the famous "Blue Pill" MCU, 64KB flash, 72MHz
STM32F411CEUx
Microcontroller48 pins
STM32F411CEUx UFQFPN-48 · MCU_ST_STM32F4 ARM Cortex-M4 with FPU — 100MHz, 512KB flash, the "Black Pill" MCU
STM32G431CBUx
Microcontroller48 pins
STM32G431CBUx UFQFPN-48 · MCU_ST_STM32G4 ARM Cortex-M4 — mixed-signal powerhouse, CORDIC, 170MHz
STM32L432KCUx
Microcontroller32 pins
STM32L432KCUx UFQFPN-32 · MCU_ST_STM32L4 Ultra-low-power ARM Cortex-M4 — 80MHz, 256KB flash, USB, tiny UFQFPN-32
Si5351A-B-GT
Clock10 pins
Si5351A-B-GT MSOP-10 · Oscillator Programmable clock generator — 3 outputs, 8kHz to 160MHz, I2C
TB6612FNG
Driver24 pins
TB6612FNG SSOP-24 · Driver_Motor Dual H-bridge motor driver — 1.2A, MOSFET output, no heat sink needed
TIP120
Transistor3 pins
TIP120 TO-220 · Transistor_BJT NPN Darlington transistor — 5A, 60V, high gain for motor driving
TL072
Op-Amp8 pins
TL072 DIP-8 / SOIC-8 · Amplifier_Operational Dual JFET-input op-amp — low noise, high slew rate, the audio favorite
TL431DBZ
Reference3 pins
TL431DBZ SOT-23 · Reference_Voltage Programmable shunt voltage reference — 2.5V to 36V, 1% accuracy
TLC5940NT
LED Driver28 pins
TLC5940NT DIP-28 · Driver_LED 16-channel PWM LED driver — 12-bit resolution, dot correction
TP4056-42-ESOP8
Power Management8 pins
TP4056-42-ESOP8 ESOP-8 · Battery_Management Li-Ion/LiPo charger — 1A, linear, constant-current/constant-voltage
TPS5430DDA
Voltage Regulator8 pins
TPS5430DDA SOIC-8 (PowerPAD) · Regulator_Switching 3A step-down converter — 36V input, 500kHz, high efficiency
TPS62200DBV
Voltage Regulator5 pins
TPS62200DBV SOT-23-5 · Regulator_Switching High-efficiency step-down converter — 300mA, 95% efficiency, SOT-23-5
TSL25911FN
Sensor6 pins
TSL25911FN DFN-6 · Sensor_Optical High-dynamic-range light sensor — I2C, 600M:1 range, lux output
UC3843
Power Controller8 pins
UC3843 DIP-8 · Regulator_Controller Current-mode PWM controller — offline SMPS, the flyback standard
ULN2003A
Driver16 pins
ULN2003A DIP-16 / SOIC-16 · Transistor_Array 7-channel Darlington driver — 500mA/ch, built-in flyback diodes
W25Q128JVS
Memory8 pins
W25Q128JVS SOIC-8 (208mil) · Memory_Flash SPI NOR flash memory — 128Mbit (16MB), 133MHz, SOIC-8
W5500
Interface48 pins
W5500 LQFP-48 · Interface_Ethernet Hardwired TCP/IP Ethernet controller — SPI, 8 sockets, 80MHz
WS2812B
LED4 pins
WS2812B 5050 SMD · LED Addressable RGB LED — integrated driver, single-wire protocol
nRF24L01 Breakout
RF Module8 pins
nRF24L01 Breakout Module (2x4 header) · RF 2.4GHz wireless transceiver module — SPI, 250kbps to 2Mbps