Laundry Detergent Level Monitor Kit with Arduino Uno + Ultrasonic
Open this project in the Soldr app → What is Soldr.ai → wiring, code and test steps for exactly these parts
Laundry Detergent Level Monitor Kit with Arduino Uno + Ultrasonic — an intermediate-level kit for teens.
Laundry Detergent Level Monitor Kit with Arduino Uno & Ultrasonic Sensor — Get Alerts Before Detergent Runs Out
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.
Running out of detergent mid-laundry is a common frustration in busy Indian households and hostels. This kit transforms a standard detergent drum into a smart container that shows the remaining level as a percentage on an OLED display and sounds an alert when the detergent drops below 20%. You’ll build a reliable, battery-powered monitor using an Arduino Uno and an HC-SR04 ultrasonic sensor — no plumbing or modifications to the drum required.
What You'll Build
You’ll create a compact sensor unit that mounts under the detergent drum’s lid. The HC-SR04 fires ultrasonic pulses down toward the liquid surface and measures the echo time to calculate the remaining detergent volume. The OLED displays a clear percentage, and when the level falls below 20%, a loud active buzzer alerts anyone in the room. The whole system runs on a single 9V battery for quick deployment.
What You'll Learn
- Calibrating an HC-SR04 ultrasonic sensor to convert distance into liquid percentage
- Programming Arduino Uno to drive a 0.96-inch OLED display via I2C
- Implementing threshold-based alerts with an active buzzer
- Building and testing a breadboard prototype with 10kΩ pull-up resistors and filtering capacitors
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| HC-SR04 | 1 |
| 0.96in OLED | 1 |
| Active Buzzer | 1 |
| 10kΩ Resistors | 5 |
| 100nF Caps | 5 |
| 400-pt Breadboard | 1 |
| M-M Wires | 20 |
| 9V Battery Snap | 1 |
HC-SR04 in detergent drum measures remaining level. OLED shows percentage and alerts when below 20%.
What's in this kit
- Arduino Uno R3
- HC-SR04
- 0.96in OLED
- Active Buzzer
- 10kΩ Resistors x5
- 100nF Caps x5
- 400-pt Breadboard
- M-M Wires x20
- 9V Battery Snap
Do you deliver across India?
Yes. We ship Laundry Detergent Level Monitor Kit with Arduino Uno + Ultrasonic across India including Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and Pune. Orders ship in 1-5 days.
What payment options are available for Laundry Detergent Level Monitor Kit with Arduino Uno + Ultrasonic?
We accept UPI, all major debit and credit cards, and Cash on Delivery (COD), available across India.
Built and shipped from Compoden, with COD and UPI available across India.
Other projects you can build
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-5 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items