Electronics: Using a Logic Level Shifter
Connecting 3.3V and 5V Circuits Connecting a 5V sensor (like an Arduino) directly to a 3.3V microcontroller (like an ESP32) can destroy the pins. 1. Bidirectional Shifters Use a MOSFET-based bidirectional shifter for I2C or SPI. These allow data to flow both ways. 2. Wiring Connect LV to 3.3V. Connect HV to 5V. Connect GND to common ground. 3. Signal Pins Connect your 3.3V signal to the LV1..4 side and your 5V signal to the corresponding HV1..4 side. 4. Testing Check the voltage on the 'LV' side with a multimeter while sending a signal. It should never exceed 3.3V.
Related Guides
- GPIO Basics on Flipper Zero — Wiring and Using Pins
- Logic Level Voltage Standards
- Flipper Zero — GPIO and Pin Reference
- How to Salvage Electronic Components from E-Waste: Desoldering, Testing, and Reuse
- I2C vs SPI vs UART: How to Choose and Use Serial Communication Protocols
- How to Do Reflow Soldering with a Hot Plate: SMD Assembly for Makers
- How to Use a Multimeter for Electronics: Every Function Explained
- How to Use an Oscilloscope for Electronics Projects: Complete Beginner Guide
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