ESP-WROOM-32 PCB Design
An example of ESP-WROOM-32 PCB design developed for a hackable clock application. Includes features like:
- Texas Instruments I2S class-D speaker driver, 2.5 watts
- Includes SD card
- OLED display driver with step-up voltage converter
- CH340 based ESP32 programmer (built in)
- EC11 encoder for OLED GUI
- RTC for time maintenance and NTP sync
ESP32 Industrial Gateway and Controller
Industrial grade ESP32 internet gateway and controller for operation in hazardous environments:
- 4G LTE modem with dual antenna and eSIM (MFF2 SIM)
- RFM95 LoRa radio module
- ESP32 ethernet interface
- Analog sensor inputs like 0-10V and 4-20mA inputs.
- Digital inputs and outputs
Precision USB Voltmeter
A precision USB voltmeter design for use in industrial environments with the following main features:
- PIC18F MCU
- 0.1% accuracy voltmeter front end
- 10 mega ohm input impedance
- 60,000 count voltmeter
- Industrial operating temperature range
- Auto ranging circuit
Low Power E-Paper Display Module
PCB module design for interfacing to a 2.6″ ultra low power E-ink paper display panel:
- 0.1″ DIP headers for easy connection to any host embedded system
- Bias voltage levels generated with very low power discrete circuits for long battery life
- Standard FPC connector that allows connection to numerous popular E-paper display panels
- M3 mount holes for mounting to enclosures or host PCB
Custom EZR32 Sub-GHz RF Module
A custom RF module built around the Silicon Labs EZR32 series of RF chipsets:
- Simulated and tuned RF antenna matching network
- Castellated vias for soldering to base boards
- Compact small footprint layout
- 0.1″ DIP header based variant