ESP32C3 Minimum System Board V1

PDF_elrs_8266_rx_mini.zip

Altium_elrs_8266_rx_mini.zip

PADS_elrs_8266_rx_mini.zip

BOM_elrs_8266_rx_mini.xlsx

96802

[2023 Electronic Engineering Contest] Problem E - Experimental Platform

It integrates 3 power supplies: 1 DC-DC (LM2596S) servo power supply, 1 5V LDO (AMS117) OpenMV power supply, and 1 3V3 (AMS117) power supply for other modules; it also integrates sound and light alarms, buttons, and RGB lighting.

Overview: This PCB
integrates three power supplies: one DC-DC (LM2596S) servo power supply, one 5V LDO (AMS117) OpenMV power supply, and one 3V3 (AMS117) power supply for other modules. It also integrates audible and visual alarms, buttons, and RGB lighting. Suitable for a simple electric 2D gimbal, as shown in Figure B (PCBA), which only requires two buttons. Circuit Module Design: Power supply is a 3S model aircraft battery. DC-DC     : The DC-DC chip is LM2596S-ADJ, with a maximum output current of 3A and adjustable voltage, meeting the requirements for simple electric 2D gimbal operation. LDO:     The LDO chip is AMS1117, with a maximum output of 1A, easily meeting the power requirements of the OpenMV circuit. The circuit is simple and easy to solder. R15 and R16 are 0Ω connected to a common ground, protecting the OpenMV from servo operation. Other Functional Module Design: Button Module:     C6, C7, and C8 are for hardware debounce. Buttons are pulled up by default, and the level is low when pressed. The buzzer in the audible and visual alarm module     is an active buzzer. In the design, the buzzer is connected in parallel with the LED, so only one IO needs to be controlled to achieve the audible and visual alarm function. R8 and R9 are shorting positions for 3V3 and 5V power supply, respectively; short one according to your needs. The RGB module     design is purely for fun. If you want to use this, please choose a transparent material for the base printout, and place the RGB on the bottom layer of the PCB. The screw holes on the A and B device bases     are injection-molded hot-melt copper nuts embedded after printing (some holes are designed relatively small, and the nuts contain printing material; the hole diameter should be enlarged before use). The final effect is excellent and looks very nice. Also, since some PCBAs are through-hole components, some space needs to be left on the printout (this was not considered or not planned during the design). Holes were drilled in the PCBA, and then a soldering iron was applied. For device A—the laser pointer—     the laser pointer diameter is 14mm, which is perfect for fixing and also allows for easy removal. However, the distance between the two holes for mounting to the pan-tilt head is a bit too close; it should be increased by 2-3mm. The design was based on the simple electric 2D pan-tilt head 3D file provided by the vendor (blame me again). Device B - the OpenMV mounting bracket     directly mounts the OpenMV camera; be careful when using it! If it doesn't fit, use a soldering iron to gently warm it up, but don't use force! However, the distance between the two holes for mounting to the pan-tilt head is a bit too close; it should be increased by 2-3mm. The design was based on the simple electric 2D pan-tilt head 3D file provided by the vendor (blame me again). An embedded injection-molded nut facilitates the next step of laser light installation. Device B - the laser light mounting bracket     was initially designed to be mounted directly on the pan-tilt head, but later the space was given to the OpenMV, so it's now mounted above the OpenMV. Summary : 1. Prepare equipment in advance or immediately. We only received the OpenMV at noon on August 4th, resulting in insufficient development and debugging time, which was a huge loss. 2. We didn't conduct extensive testing before packaging. Before packaging, we needed to test in different locations and under different light intensities; we only tested it once, which was a huge loss! 3. Health is very important! During the days of the competition , I stayed up all night, mainly because I had nothing to work on and couldn't make any progress. The PCB design was completed on the first night of the competition. That night, around 3 or 4 AM, a small dog knocked on the door, then went out and barked in the hallway—something's up. There was also a large bug, about 5 centimeters long, covered in legs—creepy, but I didn't take a picture. The video shows the RGB testing, the appearance of device A and device B, and the little dog.

VID_20230805_153150.mp4

QQ Video 20230810114635.mp4

Electronic Design Contest_3D Printing Files.zip

2EB09818D5E672E74F4703B690C0160E.mp4

VID_20230806_032446.mp4

PDF_【2023 Electronic Engineering Contest】Problem E - Experimental Platform.zip

Altium_【2023 Electronic Engineering Contest】Problem E - Experimental Platform.zip

PADS_【2023 Electronic Engineering Contest】Problem E - Experimental Platform.zip

BOM_【2023 Electronic Engineering Contest】Problem E - Experimental Platform.xlsx

96803

PixelWeatherPCB

The ink bottle weather station I made a few years ago uses HanShuo Electronics price tags as the shell and ESP8266 as the main control chip. It is still working normally. Since development and maintenance have stopped (only urgent software bugs are fixed), it has been open-sourced to the JLCPCB platform.

The weather station source code has had all signatures and encryption verifications removed. After creating the PCB, the firmware can be directly flashed. It is not restricted to any use by anyone for any purpose; secondary development is not the responsibility of the author.



eagle.flash.bin
0x0
(required),


eagle.irom0text.bin
0x10000
(required),


esp_init_data_default_v05.bin
0x3fc000
(required only for the first flash



 
). Special thanks to users who previously purchased the software!
 
More information can be found at: https://www.cnblogs.com/yanye0xcc/p/14994806.html
Hosted on GitHub (emergency bug fixes will be provided here):
https://github.com/Yanye0xFF/PixelWeather

eagle.flash.bin

eagle.irom0text.bin

esp_init_data_default_v05.bin

PDF_PixelWeatherPCB.zip

Altium_PixelWeatherPCB.zip

PADS_PixelWeatherPCB.zip

BOM_PixelWeatherPCB.xlsx

96805

TPS5450 step-down module verification board

The TPS5450 is a high-output-current PWM converter that integrates a low-resistance high-side N-channel MOSFET. It includes a high-performance voltage error amplifier, undervoltage lockout circuitry, an internally integrated slow-start circuit, and a voltage feedforward circuit.

Wide input voltage range: 5.5V to 36V;
Up to 5A continuous (6A peak) output current;
Greater than 90% efficiency achieved through a 110mΩ integrated MOSFET switch;
Wide output voltage range: Adjustable down to 1.22V with 1.5% initial accuracy;
Internal compensation minimizes the number of external components;
Suitable for small filter sizes; Fixed 500kHz switching frequency;
18µA shutdown current;
Improved line conditioning and transient response through input voltage feedforward;
System protected against overcurrent, overvoltage, and thermal shutdown;
–40°C to 125°C operating junction temperature range
; Utilizes a small, thermally enhanced 8-pin SOIC PowerPAD™ package;

 
Input 24V, Output 5.3V 5A tested and working; Enhanced cooling is required for long-term full-load operation.