I can remember buying my first electronic calculator. I was teaching a graduate level statistics course and I
had to have a calculator with a square root function. Back in the late 1960s, that w
FFeeaattuurreess Input voltage range: 2.2 to 6V Programmable LED Current Drives LEDs Up to 27V Switching Frequency:up to 800KHz Wide dimming frequency range: 20KHz~ &nbs