Standby Power Vampire Hunter Kit with Arduino Uno
Standby Power Vampire Hunter Kit with Arduino Uno – Detect mW Standby Drain
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Plug any appliance into this Arduino-powered meter and watch the LCD reveal its true standby power consumption in milliwatts. Most homes in India lose hundreds of rupees every year to electronics that quietly draw power even when “off” — this kit gives you the tool to identify and eliminate those phantom loads. It’s a practical, intermediate-level project that turns you into an energy auditor.
What You'll Build
You’ll construct a compact, handheld power monitor that connects between an appliance and its power source, reading the standby current with an ACS712 sensor and amplifying the signal through an LM358 op‑amp for milliamp sensitivity. The Arduino processes the data and drives a 16×2 LCD with I2C backpack, showing live milliwatt values. With calibration, you’ll have a reliable instrument to audit vampires in your own home.
What You'll Learn
- How an ACS712 Hall‑effect current sensor works and how to boost its output with an op‑amp for micro‑ampere resolution
- Configuring an LM358 in a non‑inverting amplifier circuit to condition tiny sensor signals
- Interfacing a 16×2 character LCD via I2C backpack for real‑time data display
- Calculating power (mW) from analog readings and writing Arduino code to show dynamic measurements
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| ACS712 5A | 1 |
| LM358 Op-Amp | 1 |
| 16x2 LCD | 1 |
| I2C Backpack | 1 |
| 100kΩ Resistors | 5 |
| 10kΩ Resistors | 5 |
| 100nF Capacitors | 5 |
| 400-pt Breadboard | 1 |
| M-M Wires | 20 |
| 9V Battery Snap | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
This kit is aimed at intermediate learners — CBSE Class 11-12 students creating a physics or computer science investigatory project, first‑year B.Tech ECE/EEE students who need a hands‑on sensor project, and ATL Tinkering Lab mentors looking for a real‑world energy‑monitoring experiment. If you’ve already tinkered with Arduino basics and want to understand analog signal processing and energy metering, this is the kit for you.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
Scan the QR code on the box to open your AI build companion, tuned specifically for this kit. If you still need a human, our team is on WhatsApp to help you through any blocker.
Is it safe to connect this kit directly to a 230V wall socket?
No. The kit operates from a 9V battery and uses the ACS712 to measure current in a low‑voltage circuit. To test real appliance standby current, you must use a properly isolated AC‑to‑low‑voltage adapter (not included) that breaks out the AC line safely. The companion guide explains this step‑by‑step.
How accurate is the milliwatt measurement?
The LM358 amplifier boosts the ACS712’s output so the Arduino can resolve standby currents down to about 1 mA. With the included calibration routine, power readings are typically accurate within ±5 mW at 5 V. Small variations may occur due to component tolerances, but the companion shows you how to fine‑tune.
Can I scale this to monitor the whole house’s phantom load?
This kit is a precise small‑scale demonstrator. For whole‑house metering you would need a higher‑rated current sensor and proper mains isolation. However, the core signal‑conditioning and display skills you learn here are directly transferable to such projects.
ACS712 in sensitive mode detects milliamp standby current of devices in standby mode. LCD shows mW.
What's in this kit
- Arduino Uno R3
- ACS712 5A
- LM358 Op-Amp
- 16x2 LCD
- I2C Backpack
- 100kΩ Resistors x5
- 10kΩ Resistors x5
- 100nF Caps x5
- 400-pt Breadboard
- M-M Wires x20
- 9V Battery Snap
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 1-2 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