Implementing SPI Communication on LPC2138 with 74HC595 LED Driver
LPC2138 integrates a hardware SPI peripheral supporting synchronous, full-duplex serial communication. During each transfer cycle, the master transmits one byte while simultaneously receiving one byte from the slave — even when the slave response is irrelevant, as in driving a 74HC595 shift register.
The following implementation configures the ...
Posted on Wed, 26 Aug 2026 16:24:13 +0000 by brokenme
Designing a Programmable Digital Clock with DS1302 and LED Displays
System Overview
This project details the construction of a cost-effective, high-precision digital clock using the DS1302 real-time clock (RTC) chip, a 51-series microcontroller (STC89C52), and 7-segment LED displays. The system provides hour, minute, and second tracking, supports user-defined time adjustment, and ensures data retention during p ...
Posted on Tue, 19 May 2026 08:48:15 +0000 by thankqwerty