Learn how to leverage CopperPilot to calculate power budgets, analyze component power
consumption across different operating modes, and select appropriate batteries for your
custom hardware designs. This tutorial demonstrates how to conduct comprehensive power
analysis that would typically take hours of datasheet research in just minutes.
Overview
Power budgeting is one of the most critical yet often overlooked aspects of hardware design.
Many projects hit a snag deep into the design phase when you realize your power budget is
off—the battery won’t last through a full use cycle, or your power supply can’t handle the
peak current draw. By the time you discover these issues, you may have already committed to
a layout or even manufactured boards.
CopperPilot helps you avoid these pitfalls by automatically researching component datasheets,
analyzing power consumption across different operating modes, validating usage patterns against
real-world statistics, and recommending appropriate battery solutions that fit your physical
constraints.
Project Context: Custom Boardroom Camera
In this tutorial, we’re designing a custom boardroom camera—similar to a meeting owl, but
completely custom-made. The device includes:
- ESP32-CAM module: Handles Wi-Fi connectivity and video streaming
- WM8960 audio codec: Drives speakers and microphone for audio I/O
- Battery backup: LiPo battery for power during meetings
- Wi-Fi streaming: Continuous video and audio transmission during active use
The device operates in two main modes:
- Idle mode: Listens for wake commands over Wi-Fi (most of the day)
- Active mode: Streams video and audio during meetings (1-2 hours per day)
The challenge: Will the battery last through an entire meeting? Can the USB power supply
handle the peak current draw? These are questions that need answers before committing to
the design.
Step-by-Step Process
Step 1: Share Component Details
Start by sharing the details of your main components with CopperPilot. Reference the
specific components in your design and explain the use case:
- ESP32-CAM module for video streaming
- WM8960 audio codec for speakers and microphone
- Voltage regulator for power management
- Expected usage patterns (idle listening vs. active streaming)
Example prompt: “I’m designing a boardroom camera with an ESP32-CAM and WM8960 codec.
It mostly stays idle, listening for wake commands over Wi-Fi, then streams video and audio
for one to two hours during meetings. Help me calculate the power budget and select an
appropriate battery.”
Step 2: CopperPilot Conducts Research
CopperPilot automatically begins researching your components:
- Gathers datasheets for the ESP32-CAM, WM8960 codec, and voltage regulator
- Looks up power consumption specs and current draw across different operating modes
- Analyzes both idle and active power states
- Identifies peak transient currents during startup
This process typically takes an hour of manual datasheet navigation—CopperPilot completes
it in minutes, and it’s not just pulling random numbers. The analysis mirrors how a power
engineer would assess the system.
Step 3: Power Consumption Breakdown
CopperPilot breaks down power consumption for each component across various operating modes:
ESP32-CAM Power Consumption
- Deep sleep: Minimal power consumption
- Modem sleep: 20-25 milliamps (Wi-Fi listening mode)
- Idle with Wi-Fi: Continuous listening for wake commands
- Video streaming (flash off): 120-180 milliamps
- Video streaming (flash on): Higher current draw
- Peak transient during startup: 280 milliamps
WM8960 Audio Codec Power Consumption
- Idle mode: Minimal power draw
- Recording mode: Current draw during microphone capture
- Playback mode: Current draw varies with volume level
- Different volume levels: Power consumption scales with output power
Step 4: Usage Pattern Validation
CopperPilot asks follow-up questions to gauge actual usage patterns:
- How many hours per day will the device be active?
- What is the expected meeting duration?
- What is the typical utilization pattern?
But here’s where it gets really clever: Even though you might estimate 1-2 hours per day,
CopperPilot doesn’t just take your word for it. It researches actual meeting room utilization
statistics to validate your assumptions:
- Typical office meeting room utilization: 30-50%
- Average meeting duration: 30-45 minutes
- Peak usage days: Tuesday through Thursday
This real-world validation ensures your power calculations are based on realistic usage
patterns, not optimistic estimates.
Step 5: Power Calculations
CopperPilot calculates power consumption across the entire day:
- Idle mode (19.5 hours): 154 milliwatts continuously during Wi-Fi listening
- Active mode (4.5 hours): Approximately 1 watt during video streaming
- Combined video and audio: 1.5 watts total during active use
- Daily energy consumption: 8.51 watt-hours per day
- Average current at 5V: 71 milliamps
Peak current analysis: During meetings with both video and audio active,
the peak current is 241 milliamps. This means a USB supply providing 3 amps has an 85%
safety margin—nowhere near its limit. This gives you confidence that your power supply
design is robust.
Step 6: Usage Scenario Planning
CopperPilot creates three realistic usage scenarios to help you plan for different
utilization levels:
- Low utilization: Minimal daily usage
- Medium utilization: 4.5 hours active, 19.5 hours idle per day (recommended)
- High utilization: Maximum expected usage
Each scenario includes detailed power calculations, helping you understand the range of
power requirements your design must accommodate.
Step 7: Thermal Analysis
Beyond just power consumption, CopperPilot calculates heat dissipation in your voltage
regulator. In this case, the heat dissipation is completely negligible, so no heat sink
is needed. This kind of analysis prevents over-engineering and helps optimize your BOM cost.
Step 8: Battery Selection
With power requirements calculated, CopperPilot helps you select an appropriate battery.
Since your PCB measures 2.6 inches by 1.2 inches, you need a LiPo battery that fits
within these physical constraints.
CopperPilot searches through battery catalogs and presents realistic options, comparing
them on:
- Thickness: Must fit within your PCB dimensions
- Capacity: Battery life in milliamp-hours
- Physical fit: Dimensions compatibility
- Runtime: How long the battery will last
Selected solution: The LP70 series with 2,500 milliamp-hours and 7
millimeters thick fits perfectly within the dimensions. The battery life is 1.09 days,
which means it can last a full workday and charge overnight. Peak runtime during a
meeting is 41 minutes, aligning with typical meeting durations.
CopperPilot also compares other options:
- 2,000 mAh version: Thinner design option
- Ultra-thin 3mm version: For high-volume manufacturing considerations
Step 9: Design Recommendations
Beyond just calculations, CopperPilot reviews your schematic and provides actual design
recommendations:
- Charging circuit: Notices if you’re missing a charging circuit and
recommends a TP4056 charging IC for the battery - Boost converter: Suggests using an MT3608 boost converter to maintain
5 volts during battery operation - Power management: Ensures seamless transition between USB power and
battery power
This is the kind of feedback you’d expect from a senior engineer reviewing your designs—
catching missing components and suggesting proven solutions.
Key Benefits
-
Comprehensive Component Research: CopperPilot automatically gathers and
analyzes datasheets from multiple sources, saving hours of manual research -
Multi-Mode Power Analysis: Breaks down power consumption across all
operating modes (sleep, idle, active, peak) just like a power engineer would -
Real-World Validation: Researches actual usage statistics to validate
your assumptions and ensure realistic power calculations -
Scenario Planning: Creates multiple usage scenarios (low, medium, high)
to help you plan for different utilization levels -
Thermal Analysis: Calculates heat dissipation to prevent over-engineering
and optimize BOM costs -
Battery Catalog Search: Searches through battery catalogs to find options
that fit your physical constraints -
Design Review: Reviews your schematic and provides recommendations for
missing components (charging circuits, boost converters) -
Time Savings: Accomplishes in 10 minutes what would take half a day:
component research, power calculations, real-world validation, battery selection, and
design recommendations
Power Budgeting Best Practices
-
Start early: Calculate power budgets before committing to layout or
component selection -
Be specific about usage patterns: Provide realistic estimates of how
long and how often the device will be active -
Consider all operating modes: Don’t just calculate peak power—analyze
sleep, idle, and active modes -
Account for peak transients: Ensure your power supply can handle startup
currents and other transient events -
Plan for multiple scenarios: Calculate power budgets for low, medium,
and high utilization to understand the full range -
Validate assumptions: Let CopperPilot research real-world usage
statistics to validate your estimates -
Consider physical constraints: When selecting batteries, provide PCB
dimensions and other physical limitations -
Review design recommendations: Pay attention to CopperPilot’s suggestions
for missing components like charging circuits -
Include safety margins: Ensure your power supply has adequate headroom
(aim for at least 50% safety margin) -
Document your calculations: Keep records of power budgets for design
reviews and future reference
When to Use Power Budgeting
- Before selecting power supplies or batteries for your design
- When designing battery-powered devices
- When working with components that have variable power consumption
- Before committing to PCB layout to ensure adequate power routing
- When optimizing for power efficiency
- During design reviews to validate power supply sizing
- When troubleshooting power-related issues in the lab
- Before manufacturing to ensure power requirements are met
Beyond Power Budgeting
While this tutorial focuses on power budgeting for a boardroom camera, CopperPilot’s power
analysis capabilities apply to any hardware project:
- IoT devices: Battery life optimization for edge devices
- Portable electronics: Power management for handheld devices
- Embedded systems: Power supply sizing for microcontrollers and peripherals
- Power supplies: Validation of regulator selection and thermal design
- Energy harvesting: Matching power sources to consumption requirements
- Wearable devices: Ultra-low power design for extended battery life
CopperPilot transforms power budgeting from a time-consuming manual process into an automated,
comprehensive analysis that catches critical issues before they become expensive problems.
In about 10 minutes of conversation, CopperPilot accomplishes what would have taken half a
day: component research, power calculations, real-world validation, battery selection, and
design recommendations. This showcases what AI for hardware design should look like.









