High sensitivity hearing aid

Introduction: High-sensitivity hearing aids

Schematic PCB

encryption switch

Introduction: Simple encryption switch circuit (watchdog)

Schematic PCB

610 ear amp before and after the stone

Introduction: 610 Headphone Amplifier

Schematic PCB

wireless microphone

Introduction: Drawings

Schematic PCB

[Amplifier] 2.5-inch tray speaker in the chassis

Introduction: In-chassis speakers made using 8002, suitable for ITX or portable matx chassis, occupying 2.5-inch disk space

Schematic PCB

LEDDotScreen

Introduction: Schematic diagram and PCB diagram of 16X16 dot matrix module LED dot matrix screen

Schematic PCB

1810200101-Bu Qirui

Introduction: Practical Assignment

Schematic PCB

Control NE555 to generate square wave through PC817 optocoupler

Introduction: Give a signal through the IO port of the microcontroller to let the NE555 generate square wave pulses.

Schematic PCB

Student ID display

Introduction: Student ID display

Schematic PCB

Model aircraft current meter distribution board

Introduction: Model aircraft current meter circuit board

Schematic PCB

Audio 4-to-1 switcher (common ground)

Introduction: CD4052 chip verification board. A 1-to-4 audio switcher made using this chip.

Schematic PCB

IGBT power module

Introduction: This project is a high-voltage IGBT power module based on the IR2136SPBF driver chip and AOD5B65M1 IGBT tube. The project includes schematic diagram and PCB.

Schematic PCB

headphone amplifier

Introduction: Headphone amps can also be used as power amplifiers

Schematic PCB

200w power amplifier verified

Introduction: 200W Class A and B amplifier HIFI remastered version

Schematic PCB

pcie_x4: SYZYGY creates PCIe x4 add-in card

SYZYGY is an FPGA extension standard for medium to high speed interfaces. This breakout connects the SerDes in the SYZYGY-TXR connector to the card edge to act as a PCIe x4 add-in card. This breakout is very simple and can be made into a shorter SYZYGY pod.

Schematic PCB

pcie_x1: SYZYGY creates a compact PCIe x1 add-in card

SYZYGY is an FPGA extension standard for medium to high speed interfaces. This breakout connects the Channel 0 TX/RX SerDes from the SYZYGY-TXR connector to the edge of the card to act as a PCIe x1 add-in card.

Schematic PCB

memory-lcd-wing: Minimal wing for OrangeCrab

This design is a wing add-on that attaches to the OrangeCrab and adds a Sharp Memory LCD. 400x240 on/off pixels. The board is the size of the monitor.

Schematic PCB

LS1C300B-SOM Loongson 1C core board

Introduction: The core board of Loongson 1C300B uses the DDR3 interface to lead out all the pins of the chip. The board integrates SDRAM, NOR Flash, CH341F, power tree, and OLED.

Schematic PCB

High power ZVS boost circuit

Introduction: ZVS is the so-called zero-voltage switching (ZVS)/zero-current switching (ZCS) technology, or soft switching technology. The efficiency of switching power supply can reach 75%~85%.

Schematic PCB

USB keyboard calculator

Make a device through Arduino to turn an ordinary USB keyboard into a keyboard with calculator function.

Schematic PCB