Design of air environment monitoring system based on ZIGBEE (Graduation Project)

Schematic PCB

atmega8-328 prototype board: good voltage filtering function

This board was created for the mcudude library and has good voltage filtering, reducing reset time via a c10 capacitor (10nF!!) on the dtr line of a ch340 system. It would be nice to solder a precision socket under the x1 oscillator, it gives you the opportunity to try different frequencies (useful for rs232 communication for example)​

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Allwinner V3S reference solution is free and open source (PCB + schematic)

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Design of digital oscilloscope based on STM32 (complete design information)

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FPGA Signal Generator Schematic Design Reference

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Dream Maker 3D Printer Mainboard Reference Schematic

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Explorer STM32F4 development board information

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Xunwei iMX6ULL Terminator Linux Development Board Hardware Data Reference (Cadence Schematic + PCB)

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Closed-loop servo stepper motor complete set of information (schematic diagram + PCB + source code)

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RGB Sudoku Game Based on PSoC 6 BLE (Schematic + Code)

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[Open Source] HuaDa HC32L136 Minimum System Reference

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Multi-axis intelligent aircraft solution based on NXP (LPC4078&JN5168)

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4A CNC regulated power supply reference design (schematic diagram + program)

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Four-axis aerial photography aircraft circuit scheme is free and open source

Four-axis drone based on STM32. With STM32 as the control core, four-axis aircraft as the carrier, and gimbal as the aerial photography system. The hardware consists of flight control circuit, power management, communication module, power system, frame, and gimbal servo system. The algorithm uses simple and stable quaternion plus complementary filtering as the attitude solution algorithm, and PID as the controller to realize flight, gimbal stabilization and other functions. It has the characteristics of flexibility, lightness, ductility, and good adaptability.

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3D printer motherboard circuit design based on ESP32S

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ESP32-based visual smart doorbell reference

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Freescale's MKM14Z64-based smart socket reference design

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Microchip Passive Keyless Entry (PKE) Reference Design

The manual describes a passive keyless entry (PKE) system upgrade for existing remote keyless entry (RKE) applications. The key design includes a PIC16F639 microcontroller with an integrated three-axis analog front-end (AFE). A PIC18F2680 microcontroller is used to implement the low-frequency transmitter.

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Circuit design scheme for ADC conversion based on DSP2407 development board

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A single-room home automation solution powered by a Raspberry Pi

Schematic PCB