Ladyada's Desk: Solar MPPT Chargers, AI Web Apps & New Sensor Breakouts

New Product Development & AI Assistance

• 🎯 Tariff-related challenges previously slowed product releases, but the team is now returning to a pace of one to two new products weekly.
• 💡 Ladyada utilized Claude AI to rapidly generate JavaScript code for a web application, enabling the plotting of color sensor data.
• 🚀 Claude proved instrumental in overcoming a 15-year gap in JavaScript experience, significantly reducing the development time for the web app to just 30 minutes.

Advanced Solar Charging Solutions

• 🔋 A new breakout board was designed for the BQ25798 Solar MPPT Charger, capable of charging 1-4S lithium batteries.
• ⚡ The charger incorporates a buck-boost converter and ideal diodes, ensuring efficient power handling from diverse input sources like DC jacks or USB.
• ☀️ It features true Maximum Power Point Tracking (MPPT), an algorithm that optimizes energy extraction from solar panels by dynamically adjusting the current set point.
• ⚙️ The system offers I2C control for advanced configuration, allowing detailed monitoring of charging parameters, current limits, and voltage cells.

New Sensor & Power Monitor Breakouts

• 🌈 A breakout for the OPT4048 color sensor was developed, with its data visualization enhanced by the Claude-generated web app.
• 💡 A VEML6046 high lux sensor breakout was introduced, designed to measure light levels up to 180 kilolux.
• 🔌 An ACS37800 30-amp power monitor breakout was created, which uses a magnetic sensor for high-current measurement without a sense resistor and provides electrical isolation.

Selecting High-Current Barrier Terminal Blocks

• 🔍 Ladyada conducted “The Great Search” for 30-amp barrier terminal blocks to complement the ACS37800 power monitor breakout.
• ✅ Key requirements included 3-pin blocks with sufficient spacing to accommodate spade or lug connectors, crucial for robust high-current setups.
• 🛠️ The selection prioritized a 3-wall style and a specific 9.5mm pitch to ensure both safety and compatibility with the PCB design.