一个5v稳压电源的设计，如果单纯5v输出的话未免有点浪费资源了，今天这这小制作也可以说是5v稳压电源的一个升级，输出电压在一定范围内是能够准确调节的，这个小制作的输出电压我试了下，如果用12v输入的话，电压在1.5v到10v之间都可准确调接，不过输出电压不能太低，低了电流会增大，有 ...

Welcome to my quick review of an inexpensive 2-channel 5V relay module controlled via RS485 bus utilizing Modbus RTU protocol. As claimed by some online sellers, this easy-to-get Modbus RTU 2-Channel ...

Next, a 5V relay is wired between the output of the timer chip and the ground rail, which runs on 5VDC. When the timer output is high, it will typically be somewhere between 1.2V and 1.7V lower than ...

The 5v version of the same relay costs less than three. I see the accomplishment in working around a problem using parts you already have, but he didn’t do that.

Over the years, we’ve seen some modern microcontrollers turn out to be 5V-tolerant – now, RP2040 joins the crowd. Half a year ago, when we covered an ISA card based on a Pi Pico, [Eben … ...