Selection of high-speed analog switch--------The desired effect is that when S4 is closed, S1 S2 S3 are disconnected; when S1 is closed, S2 S3 S4 are disconnected; when S2 is closed, S3 is closed, and
1. Introduction to RJM8L303 chipRJM8L303 is a low-power security MCU chip launched by Wuhan Ruinajie Electronic Technology Co., Ltd., which adopts an enhanced 80C51 core, has 8KB SRAM and 128KB Flash
1993 1. The first newspaper for eating, drinking and having fun, "Fine Shopping Guide" was launched on January 8. 2. The first fashion magazine, "Vogue" magazine was launched in August. 3. Going abroa