// actuator
28BYJ-48 + ULN2003
5V unipolar stepper + driver board
€3.00
avg eur
no image
Digital
Pins
6
Specs
4
Libraries
2
Protocols
1
// wiring → esp32 devkit v1
3V3
EN
GPIO36
VP
GPIO39
VN
GPIO34
GPIO35
GPIO32
GPIO33
IN4
GPIO25
IN3
GPIO26
IN2
GPIO27
IN1
GPIO14
GPIO12
GND (driver)
GND
GPIO13
ESP32
WROOM-32
devkit v1
USB
VIN
5V
VCC (driver)
GND
GPIO23
GPIO22
SCL
GPIO1
TX0
GPIO3
RX0
GPIO21
SDA
GPIO19
MISO
GPIO18
SCK
GPIO5
SS
GPIO17
TX2
GPIO16
RX2
GPIO4
GPIO2
GPIO15
sensor pin (left)
sensor pin (right)
unused
// pinout → esp32
| Sensor Pin | ESP32 Connection |
|---|---|
| VCC (driver) | 5V |
| GND (driver) | GND |
| IN1 | GPIO 14 |
| IN2 | GPIO 27 |
| IN3 | GPIO 26 |
| IN4 | GPIO 25 |
// technical specs
Steps
2048 / rev (half-step)
Torque
~300 g·cm
Voltage
5V
Current
~250 mA
// github libraries
// notes & warnings
Slow but cheap. Geared 1:64 — high resolution, low speed. ULN2003 is a Darlington array, not a real driver.
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