TM1637 - Digital Tube Module

PDF_TM1637-Digital Tube Module.zip

Altium_TM1637-Digital Tube Module.zip

PADS_TM1637-Digital Tube Module.zip

BOM_TM1637-Digital Tube Module.xlsx

93657

45W Open Source GaN Charger

This 45W GaN dual-port Type-C charger supports PD3.0 and employs a QR flyback + dual-channel Buck converter architecture, controlling protocol output through a protocol chip. It boasts a maximum ACDC conversion efficiency of 94.5% and a maximum ACDC+DCDC conversion efficiency of 93.0%.

 The chip solution uses DK045G+DK5V120R15V+FS8626+NDP13401KC.
 
 
 Aging data under ambient temperature (30°C): Input AC115V 60HZ, Output 20V 2.25A:
   I-shaped inductor: 90℃;
   DK045G GaN chip: 75
   ℃; Rectifier bridge
   : 77℃; RCD absorption
   diode: 81℃; Synchronous rectifier
   chip: 70℃;
   Transformer coil: 75℃; Transformer core
   : 69℃; Buck chip: maximum
   79℃; Buck inductor: maximum 70℃.
Ripple measured with a load tester:
Output voltage ripple: 20V/2.25A: 62mV, 15V/3A: 36mV, 12V/3A: 36mV, 9V/3A: 36mV, 5V/3A: 34mV. A screenshot of the ripple test is shown.
Ripple is measured at its maximum value under different input voltages. Conversion efficiency is measured under the following conditions: input 230VAC, 50Hz.
Supported protocols: PD3.0, DCP. See the diagram for specific supported PDO levels. Both ports support 45W fast charging. Power allocation for simultaneous dual-port insertion is C1: 27W, C2: 18W.
The FS8626 protocol chip can also support more charging protocols, such as SCP, FCP, QC, etc. These charging protocols are not enabled internally in this design. If you need to support these protocols, connect the D+ and D- terminals of the FS8626 on PCB2 to the D+ and D- terminals of the USB-C female connector via traces and enable these protocols in the protocol chip.
With an input of 264VAC and a full-load output of 20V, the highest peak voltage spike of the gallium nitride (GaN) switch was 544V
upon power-on/off. With an input of 264VAC and a full-load output of 20V, the highest peak voltage spike of the synchronous rectification was 108.5V upon
power-on/off. With an input of 115VAC at 60Hz and a full-load output of 20V, the voltage between the GaN and diodes (DS) before power-on was only around 40V, essentially achieving zero-voltage switching (ZVS), with very low switching losses.
EMI radiation test data showed a pass with a 4dB margin.
 

PCB files packaged in zip

Schematic diagram.SchDoc

Transformer Specification V1.doc

BOM (Bill of Materials) list.xlsx

PDF_45W Open Source GaN Charger.zip

Altium_45W Open Source GaN Charger.zip

PADS_45W Open Source GaN Charger.zip

BOM_45W Open Source GaN Charger.xlsx

93661

VDF Clock and Temperature/Humidity

ESP32C3, IP5306, DHT11, DS3231

It has a reserved IIC interface, a single-wire interface, and 3 buttons. It can connect to clock modules such as DS3231, temperature and humidity meters such as DHT, etc. There are 3 customizable buttons and one IP5306 control button.

PDF_VDF Clock and Temperature Humidity.zip

Altium_VDF Clock & Temperature & Humidity.zip

PADS_VDF Clock & Temperature & Humidity.zip

BOM_VDF Clock and Temperature/Humidity.xlsx

93662

Retro handheld game console based on LCSC ESP32S3R8N8 development board

Handheld game projects suitable for beginners to recreate and get started

Retro Handheld Game Console
- Fun and Replicable.
Utilizing the LCSC ESP32S3R8N8 development board, this console
boasts high replication and reusability.
Fewer components reduce soldering, and the board can be easily removed for debugging and testing in other projects.
 
- Affordable :
It features a commercially available injection-molded shell,
offering a comfortable grip, a variety of color options, and an affordable price.
The motherboard is smaller than 10x10cm,
and most components, except for peripheral parts, are from LCSC's monthly special offer brands, supporting every passion.
 
- Open
System: Employing Retro-Go (https://github.com/ducalex/retro-go),
both software and hardware are open-source, allowing for unrestricted use.
 
 
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 
240719 Update:
Added recommended screen links and screen stands (attachments).
Completed missing reference components.
Added motherboard (power-on status follows power on/off).
 
- 240709 Update:
Added Chinese language support and localized the menu. (Attachment section)
Supported range [0000 - FFFF] 
(Open source font library and character statistics: https://github.com/TakWolf/fusion-pixel-font/blob/2024.05.12/docs/font-info-12px-monospaced.md)
(PCB unchanged)
 
 
 
- - - - - - - - - - - - - - - - - - - - - - - - - -
 
 The material and component list is at the bottom. For more tutorials, please join the QQ group: 971882968 
 
- - - - - - - - - - - - - - - - - - - - - - - - -
 
 
Firmware burning :
Download the burning software and burn the attached img file. You can also compile
the official tutorial yourself: https://lceda001.feishu.cn/wiki/WruJwIsP8iZy4yk8KBxccZtrnSf
PCB
board thickness 1mm,
number of layers 2
, material



name,
quantity,
remarks:


Screen
1 (

self-selected)
, 2.8-inch IPS, driver ST7789 40PIN.
Reference link
: https://item.taobao.com/item.htm?id=679358016598
Reference link (no longer recommended)
: https://item.taobao.com/item.htm?id=601639477415



Casing
1 (

game store, 12 yuan per set,
includes panel, buttons, switch, screws, etc.)
: https://item.taobao.com/item.htm?id=541458746506



Conductive adhesive
1 (

game store, 0.8 yuan per set
; don't buy high-quality ones, they're expensive and don't feel good):
https://item.taobao.com/item.htm?id=530650427188



LCSC development board ESP32S3R8N8
1.

LCSC Mall
: https://lckfb.com/project/detail/lckfb-esp32s3r8n8?param=baseInfo 23MM -8Ω 1W-2P 1.25/



Speaker (with plug): https://item.taobao.com/item.htm?id=683916928147 1 Battery (choose 1): Battery comes with the casing. Personal test: 14500 MHz pointed tip [3.7V-4.2V] (1 battery): https://item.taobao.com/item.htm?id=703883773498 1 TF Card ( choose 1) : Screen Stand: 1 Accessories: Development Board Stand: 2 Color Classification: 2.54 1*20P 5 SMD socket headers, 3.5mm height , standard pin configuration. Buy 5 for one set. [Link : https://item.taobao.com/item.htm?id=709718932552 ] Component Name | Quantity | Remarks TF Card Slot | 1 | LCSC Mall 3-Button Toggle | 1 | LCSC Mall C318951 Screen Mount | 1 | 40PIN 0.5mm Pitch Top Drawer Type | LCSC Mall C262648 C11097 C19273956 C481228 C2911781 C19268213 C1121880 C883646 C2915411 C2986759 C7422278 C5691126 C19191165















































































C19724825
C19267925
C5362166
C2911822 Select slide switch 1 (single-pole three-throw )
from LCSC Mall. C2681569 C145851 C2858293 Select Type-C interface 1 (16P) from LCSC Mall. Select MX1.25 socket 2 (2P) from LCSC Mall. C7430468 C7433453 C2845379 C3029359 C2936203 C17700350 C5142069 C18077932 C397377 C2919588 C2874487 Select MX1.25 terminal wire 1 (2P) from LCSC Mall. C5363453 Select 0603 resistor 5.1K from LCSC Mall . 2. Choose 0603 resistor 10K. 7. Choose 0603 resistor 1K. 2. Choose 0603 capacitor 10uF. 3. Choose 0603 capacitor 100nF. 4. Choose AO3415. 2. Choose from LCSC Mall C2938370 C4748719 C5379094 C2847034 C5372708 C5379093 C19630788 . Choose TP4056 according to the current month's coupon . 1. Choose from LCSC Mall C7473158 C382139 C17702041 C20199357 C21713961 . Choose pin 2 according to the current month's coupon. Working height 6mm, spacing 1.5mm (Note the spacing, may need adjustment). Choose from LCSC Mall C5157266. Choose 1N5819WS according to the current month's coupon . 1. Choose from LCSC Mall C2927280 or C5451629. Alternatively, select NS4168 based on the current month's coupon. 2. Choose from https://item.taobao.com/item.htm?id=707529865136 . Free shipping on 5 items.















































































































































 

Screen bracket .stl

retro-go_1.42-7-g20f5e-dirty_c19.img

Screen Stand_NewScreen.stl

retro-go_1.42-8-g18b22-dirty_c19_new screen.img

PDF_Retro Handheld Game Console Based on LCSC ESP32S3R8N8 Development Board.zip

Altium - A retro handheld game console based on the LCSC ESP32S3R8N8 development board.zip

PADS - A retro handheld game console based on the LCSC ESP32S3R8N8 development board.zip

BOM_Retro Handheld Game Console Based on LCSC ESP32S3R8N8 Development Board.xlsx

93663

electronic