Real-time clock made by STC90C54RD+SD2405ALPI

I have an SD2405ALPI-G on hand, and I happen to have an STC learning board, so I made a clock with an annual error of about 2.5 minutes to play with. The schematic and program are all there. Now the hardware has a ringtone generating chip and a power amplifier chip, but the program has only initially implemented the function of displaying the day of the week, hours, minutes and seconds. It will be changed to an alarm clock when there is time.

Schematic PCB

netSHIELD Industrial Ethernet Protocol Expansion Board for STM32 Nucleo

netSHIELD industrial Ethernet protocol expansion board for STM32 Nucleo

Schematic PCB

DEMO9RS08LA8: RS08LA Tool Summary Page

Schematic PCB

Electric vehicle charger source program based on ATmega48PA chip, including PCB board

The charger program written with STM8S003 has positive and negative pulses throughout the process, anti-reverse connection, scheduled shutdown during charging, and negative pulses to repair the battery later.

Schematic PCB

Electronic scale solution, schematic diagram and program based on AT89C51

Electronic scale solution, schematic diagram and program based on AT89C51

Schematic PCB

MPC866ADS_KIT: MPC866 application development system kit

The MPC866ADS board is designed to provide an evaluation platform for MPC8xx series devices and provide support for hardware and software developers of PowerQUICC series devices.

Schematic PCB

OM14500-TJA1102: Evaluation Board, TJA1102HN 100BASE-T1 Automotive Ethernet PHY

Fully automatic washing machine design

This article designs a fully automatic washing machine control system with the AT89C51 microcontroller as the core. This system realizes the control of the entire washing process of the washing machine, including the four stages of user program input, washing, dehydration and end alarm. Laundry control system based on AT89C51 microcontroller, the control panel consists of buttons, indicator lights and LCD display. The buttons select the working mode of the washing machine and the start and pause functions. The indicator lights work with the buttons, and the LCD display shows the working mode of the washing machine. The overall circuit module of the washing machine includes four independent keyboards, indicator lights, motor control and LCD display.

Schematic PCB

Electronic dice source program list (assembly language)

Electronic dice source program list

Schematic PCB

Infrared remote control Proteus simulation circuit transmitting and receiving program

Infrared remote control Proteus simulation circuit transmitting and receiving program

Schematic PCB

Automotive Ethernet 100BASE-T1 PHY Customer Evaluation Board

Schematic PCB

KIT33662LEFEVBE: Evaluation Kit - MC33662L, LIN2.1/SAEJ2602-2, LIN Physical Layer

OM13089: LPCXpresso54114 circuit board

Schematic PCB

Daughter board/adapter board for SPC560 series devices in QFP100 package

SPC560 series device daughter board/adapter board in QFP100 package

Schematic PCB

GPS/GPRS logistics protocol vehicle terminal source program based on NXP LPC2387+UCOS-II

Version V0.2 Completed and verified functions: 1.GPS receiving function 2. Self-detection function 3. Login to server function 4. Reconnect to server function

Schematic PCB

Traffic light control system based on 51 microcontroller

With timing settings, night mode, manual control and other functions

Schematic PCB

MP23ABS1 based analog MEMS microphone expansion board based on STM32 Nucleo

Analog MEMS microphone expansion board based on MP23ABS1 for STM32 Nucleo

Schematic PCB

2018 Electronic Competition Question A-Current Signal Detection Device (Xidian University)

Schematic PCB

MAC57D5xxEVB: MAC57D5xx development platform

MAC57D5xx MCU EVB board for instrument panels and industrial flat panel displays. Based on Arm Cortex-M for real time and Arm Cortex-A for apps and HMI.

Schematic PCB

KEA128 and MC10XS3425 lighting controls and electronic switches