ET-S33
HC-SR04 Ultrasonic Carrier
3.3 V level-shifting carrier for HC-SR04
AED 12.00
Out of stockOverview
3.3 V level-shifting carrier for HC-SR04
The ET-S33 is built around the HC-SR04 ultrasonic ranger, 2cm–4m, 15° beam (module sold separately or bundled). It runs from 5V on VIN; IOREF = 1.8–5V host logic.
Designed in Dubai by ElectroTrical — the full schematic, BOM and design notes are published below.
Good for
- Distance sensing with ESP32 and Pi
- Robot obstacle detection
- Tank level sensing
Key features
What makes it different
Module
HC-SR04 ultrasonic ranger, 2cm–4m, 15° beam (module sold separately or bundled)
Value add
Bidirectional BSS138 shifting so ESP32 / Pi / 3.3V boards can use the 5V module safely; mounting holes; clean labelled header
Supply
5V on VIN; IOREF = 1.8–5V host logic
Libraries
NewPing (Arduino), gpiozero DistanceSensor (Pi), ESPHome ultrasonic
Open documentation
Schematic, BOM and layout notes published for every board.
Breadboard friendly
Standard 2.54 mm pitch and M2.5 mounting holes.
Specifications
Technical specifications
| Module | HC-SR04 ultrasonic ranger, 2cm–4m, 15° beam (module sold separately or bundled) |
|---|---|
| Value add | Bidirectional BSS138 shifting so ESP32 / Pi / 3.3V boards can use the 5V module safely; mounting holes; clean labelled header |
| Supply | 5V on VIN; IOREF = 1.8–5V host logic |
| Size | 50.0 × 25.4 mm |
|---|---|
| Mounting | 4 × M2.5 holes, 2.54 mm from each corner |
| Connectors | 5-pin 2.54 mm header |
| Revision | Rev B |
| Libraries | NewPing (Arduino), gpiozero DistanceSensor (Pi), ESPHome ultrasonic |
|---|
| JP1 (default Closed) | Cut to turn off the LED |
|---|
Performance
Echo timing
Pinout
Pin map and connections
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | Power | 5V required (module is 5V-only) |
| 2 | IOREF | Power | Host logic level: 3.3V or 5V |
| 3 | GND | Ground | Ground |
| 4 | TRIG | Signal | Host level, ≥10µs high pulse |
| 5 | ECHO | Output | Host level, pulse width = distance |
Mechanical
Dimensions and what's in the box
In the box
- 1 × ET-S33 HC-SR04 Ultrasonic Carrier (assembled)
- 1 × 5-pin 2.54 mm male header, unsoldered
Getting started
- Wire the header: VIN, IOREF, GND, TRIG, ECHO
- Libraries: NewPing (Arduino), gpiozero DistanceSensor (Pi), ESPHome
ultrasonic
Compare
Which distance sensor?
| HC-SR04 Ultrasonic Carrier (this board)This board | ET-S05 VL53L1X Time-of-Flight Sensor | ET-S32 VL53L5CX 8×8 Multizone ToF | |
|---|---|---|---|
| What it does | 3.3 V level-shifting carrier for HC-SR04 | Laser distance up to 4 m over I²C | 64-zone depth map up to 4 m |
| Interface | — | I²C 0x29 (changeable in software at runtime) | I²C 0x29 default (changeable in software; LPn… |
| Best for | Distance sensing with ESP32 and Pi | Obstacle avoidance for robots | Robot obstacle maps |
| Price | 12 AED | 49 AED | 79 AED |
Downloads
Documents and design files
Need a custom version of this board?
Different connector, size or sensor? We design and build custom variants.