Reference design of Epson multimeter microcontroller S1C17M02/M03

Can measure DC/AC voltage, DC/AC current, resistance, inductance, capacitance, diode, frequency. Built-in 16bit ADC, digital filter, RMS effective value circuit and peak hold circuit. Multimeter control unit integrated with microcontroller, officially launched reference design kit, powered by button battery, including schematic diagram.

Schematic PCB

Raspberry Pi microcontroller 100Msps dual-channel oscilloscope software and hardware are fully open source, including detailed instructions

The current design solution uses an 8-bit ADC chip ADC08100 and a 100M bandwidth front-end analog circuit. In fact, if you want to play, you can improve the indicators and use AD9288 or the domestic alternative MXT2088. One chip has two channels and achieves a 250M sampling rate through rapid alternating sampling.

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Avem: A lightweight UAV flight control based on STM32F103

A lightweight UAV flight control based on STM32F103.

Schematic PCB

TI releases space-grade 3-7V input, 24A/0.95V output reference design

This is a 24-A DC/DC space-grade power supply hardware reference design.
With the advancement of FPGA and ASIC technology, the core voltage requirements are getting lower and lower, but the current requirements are getting larger and larger. The latest space-grade FPGAs and ASICs require low voltage and high current to meet their core power consumption.

Schematic PCB

ReflowMaster: open source reflow master control based on the magic oven (schematic, PCB, gerber, source code, etc.)

Reflow Master Pro is designed to work in any oven - no algorithm adjustments required! That said, if you really want to tweak, you can switch from the classic Reflow Master algorithm to PID control and adjust your settings to your liking.

Schematic PCB

Low-cost 2.5KV USB power isolation solution (schematic + BOM + gerber, etc.)

This is a low-cost isolation achieved through a power transformer. Since the transformer is more convenient for AC isolation, but DC is not suitable, ATtiny412 is specially used for control.

Schematic PCB

VESC – Benjamin’s open source brushless motor driver (schematic, PCB, firmware, tool software, etc.)

ESC is the abbreviation of Electric Speed ​​Controller, that is, electronic speed controller, or ESC for short. The author is Benjamin Vedder, so it is called VESC. You may have heard of it, which is Benjamin ESC. This project is mainly divided into several parts, VESC firmware, bill of materials, VESC hardware, and VESC tool software. It is a very complete software and hardware project, and the supporting software is also excellent.

Schematic PCB

Simple circuit to detect mobile phones

Cell phones typically send and receive signals in the frequency range 0.9 to 3GHz. This article provides a simple circuit that detects the presence of an activated mobile phone by detecting these signals.
The basic principle of the mobile phone detector circuit is to detect radio frequency signals. In Schottky diode circuits, Schottky semiconductors are used to detect mobile phone signals because of their unique properties of being able to correct low-frequency signals with low noise rates. When an inductor is placed near an RF signal source, it receives the signal through mutual inductance. This signal is rectified by a Schottky diode. This low-power signal can be amplified and used to power any indicator light, such as an LED in this case.

Schematic PCB

ChipWhisperer - Automotive grade chip blasting equipment

ChipWhisperer is a complete open source tool chain launched by NewAE for side-channel power analysis and fault attacks. The tool chain includes hardware, host computer software, and hardware chip firmware, all open source on Github. This set of equipment is mainly dedicated to hardware security research.

Schematic PCB

Power Profiler Kit II - Open source second-generation power measurement kit from Nordic

The Power Profiler Kit II (PPK2) is a stand-alone unit that, in addition to external hardware, can measure and optionally source current on all Nordic DK boards from sub-uA up to 1A.

Schematic PCB

STM32 OpenSource Multimeter - an open source multimeter suitable for DIY entry

An open source multimeter design based on STM32F1/F3, with dual-range V/I, RMS measurement, continuity, component testing and other functions. The author has made all design files open source, which is very suitable for DIY entry.

Schematic PCB

Full open source reverse "blasting" tool

Through this open source tool, everyone can better understand how program firmware is "exploded", thereby improving product security. Crack AES, crack RSA, crack DES and so on.

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Simple walking robot program source code

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Three-axis gimbal source code schematic software

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DIY simple obstacle avoidance car (with schematic and source code)

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Remote video monitoring source code and schematic diagram based on STM32F4

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Agilent power supply schematic diagram

The complete circuit diagram can be used directly for circuit design reference. Simple CNC DC power supply, core power circuit part. Including AC and DC input parts, the pre-voltage regulation part is helpful for dispersing the heat of power devices; input and output protection, startup delay, communication functions; voltage control, current control, overvoltage and overcurrent protection;

Schematic PCB

1200W switching power supply design schematic diagram and PCB design information

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PIC30v voltmeter schematic diagram

The 30v voltmeter made with PIC16f676 includes schematic diagram and source program.

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Smoke detector schematic and PCB source files and BOM

Smoke sensor design includes principle circuit design, PCB and BOM list

Schematic PCB