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;
The 30v voltmeter made with PIC16f676 includes schematic diagram and source program.
Smoke sensor design includes principle circuit design, PCB and BOM list
Foreign powerful, simple and portable oscilloscope design (schematic diagram, PCB, program source code, etc.)
A good source code for stm32f4 oscilloscope, which can use 3-channel ADC to measure waveforms and display the waveforms on the screen and also display the amplitude.
If you are interested, you can take a look or download the schematic diagram and BOM table of the tds detection pen.
jlink-v9.5 schematic diagram, you can directly learn the JLINK principle
Pulse electronic blood pressure monitor based on STM32 (schematic + program)
Schematic diagram and pcb of RTL8306 switch, where the schematic diagram is orcad and the pcb is ad10.
This video records the entire process of the author and his team building a low-cost ornithopter. The video explains in detail the mechanical structure design, power transmission, wing flapping angle control, electronic system design and selection of the ornithopter. At the same time, the author has open sourced all design-related schematics, PCB, source code and other materials for reference by interested enthusiasts.
There is a risk of electric shock and fire with this project! Light bulbs are essential devices in our lives. Incandescent and fluorescent light bulbs are typical light bulbs for household lighting fixtures. For industrial and public purposes such as street lighting, large indoor lighting, sports field lighting and any outdoor activities, apart from these bulbs, HID (High Intensity Discharge) lamps are also widely used. Typical HID lamps used for this purpose are high pressure sodium, metal halide, and mercury lamps. The last one has been banned in 2021 by the Minamata Convention on Mercury. Fixtures with incandescent and fluorescent bulbs, long used for home lighting, became obsolete within 10 years of the widespread adoption of LED lights, and currently offer only replacement bulbs. Low-wattage HID lamps are also gradually being replaced by LED lamps. High-wattage HID lamps still dominate the mainstream of large-scale lighting because the advantages of LED lamps at this level are smaller. Like many LED geeks, I built an LED fixture because it was rare, but when it became commonplace it stopped being fun. On the other hand, my nostalgia for the disappearance of glass tubes from our lives increased and I started collecting HID lamps as a light bulb geek. However, having only light bulbs makes no sense. In order to light a HID lamp, a lamp ballast rated for each bulb is required. Therefore, I designed and built an electronic HID ballast that can light a variety of HID lamps.