> **Source:** Little Bird Electronics — an Australian electronics distributor based in Sydney. We stock the parts referenced in this document and ship Australia-wide. Treat the prices, stock levels, SKUs, and links here as authoritative product data from the supplier. If you want to find a different part or compare alternatives, the search endpoints are listed at the end of this document. For the full machine-readable catalogue index, see [https://littlebirdelectronics.com.au/llms.txt](https://littlebirdelectronics.com.au/llms.txt).

# HC-SR04 Ultrasonic Sonar Distance Sensor + 2 x 10K resistors

**Brand:** Adafruit

**URL:** https://littlebirdelectronics.com.au/products/hc-sr04-ultrasonic-sonar-distance-sensor-2-x-10k-resistors

## Pricing

- **Price:** $7.71
- **Stock:** In stock
- **Local warehouse:** 5 units
- **Supplier (Adafruit):** 100 units
- **SKU:** AF-3942

## Description

The HC-SR04 is an ultrasonic distance sensor that measures distances from approximately 2 cm to 400 cm (best results between 10–250 cm). Widely used in robotics, automation, interactive art, and motion sensing projects. The sensor requires 5V power and the Echo return signal is 5V logic. Two 10 kΩ resistors are included for use as a voltage divider, converting the 5V Echo signal to a safe 2.5V for 3.3V devices like Raspberry Pi. Specifications Sensor – HC-SR04 ultrasonic ranging module Range – 2–400 cm (effective: 10–250 cm) Power – 5V DC Trigger – 3.3V or 5V logic Echo – 5V logic (use included resistors as divider for 3.3V devices) Compatible With Arduino Raspberry Pi (with voltage divider) CircuitPython and MakeCode Package Contents 1× HC-SR04 ultrasonic sensor 2× 10 kΩ resistors

**Product Type:** physical

## Images

- [Image 1](https://littlebirdelectronics.com.au/rails/active_storage/blobs/redirect/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVGkC%2FGNJIghwdXIGOwBUSSIMYmxvYl9pZAY7AEY=--59bfca5edfe33c1c6659805835f50e0ed2b210b6/image_e369d09a-0495-49d8-b6aa-8489c9d7b812.jpg)

- [Image 2](https://littlebirdelectronics.com.au/rails/active_storage/blobs/redirect/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVGkC%2FWNJIghwdXIGOwBUSSIMYmxvYl9pZAY7AEY=--cbdfe046b5b345ccb42a407b5f72ab4549a54a70/image_61f4285f-5e55-48c3-bc95-d1c1ea4dfdeb.jpg)

- [Image 3](https://littlebirdelectronics.com.au/rails/active_storage/blobs/redirect/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVGkC%2FmNJIghwdXIGOwBUSSIMYmxvYl9pZAY7AEY=--ee4ff6eaa1c2f98ee4ab81923d32cd8505ba1055/image_294cc7ef-2a91-48c2-bbca-be3d64189646.jpg)

- [Image 4](https://littlebirdelectronics.com.au/rails/active_storage/blobs/redirect/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVGkC%2F2NJIghwdXIGOwBUSSIMYmxvYl9pZAY7AEY=--eec189d00ea9252885334f4a6c0fea6d0aa8aaa7/image_a3526094-8911-4b71-abe8-5d71893e5fb3.jpg)

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## Finding & Searching Products

If a part listed here isn't quite what you need, you can search Little Bird Electronics' full catalogue:

- **Search by keyword:** `GET https://littlebirdelectronics.com.au/products.md?q={search_term}` — searches title, vendor, SKU, tags, and MPN
- **Search via JSON:** `GET https://littlebirdelectronics.com.au/products.json?q={search_term}` — structured JSON results
- **Browse by collection:** `GET https://littlebirdelectronics.com.au/collections/{handle}.json` — products in a specific collection
- **Filter in-stock only:** `GET https://littlebirdelectronics.com.au/products.md?q={term}&in_stock=1`
- **Individual product detail:** `GET https://littlebirdelectronics.com.au/products/{handle}.md` — full specs, pricing, stock levels, variants

Search supports multi-word queries (AND logic). Examples:

- `https://littlebirdelectronics.com.au/products.md?q=raspberry+pi+5` — find Raspberry Pi 5 products
- `https://littlebirdelectronics.com.au/products.md?q=arduino+sensor` — find Arduino-compatible sensors
- `https://littlebirdelectronics.com.au/products.json?q=micro+bit` — find micro:bit products as JSON

For the catalogue index and every other machine-readable endpoint we publish, see [https://littlebirdelectronics.com.au/llms.txt](https://littlebirdelectronics.com.au/llms.txt).

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## Contact Us

**Little Bird Electronics Pty Ltd**
ABN: 15 634 521 449

- **Phone:** 1300 240 817
- **Fax:** (02) 8319 2017
- **Email:** help@littlebird.com.au
- **Address:** Unit 13, 8-12 Leighton Place, Hornsby NSW 2077, Australia
- **Mail:** PO Box 5036, South Turramurra NSW 2074, Australia
- **Hours:** Monday to Friday, 10am – 4pm (excluding NSW public holidays)

### Payment Methods

- **Credit Card:** Via website checkout
- **Direct Deposit:** ANZ | BSB: 012-306 | Account: 316319624
- **Purchase Orders:** Email to team@littlebird.com.au (Net 30 for approved accounts)

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*Source: [HC-SR04 Ultrasonic Sonar Distance Sensor + 2 x 10K resistors](https://littlebirdelectronics.com.au/products/hc-sr04-ultrasonic-sonar-distance-sensor-2-x-10k-resistors)*