电工基础2026-03-07

音量指示器--Sound Level Indicator This project uses an LM3915 bar-graph IC driving two sets of ten LEDs for a 30dB range. The circuit is unique because it has an additional range of 20dB provided by

阅读全文 >>

电工基础2026-03-07

低功耗闪烁器电路--Low power blink led R1 = 4 mOhm D1 = Red Led 5mm    R2,6 = 10 mOhm T1 = BS170    R3 = 470 Ohm T2 = BC560B   R4 = 10 kOhm   T3 =   BC516    p5 = 680 KOhm P1 = 5 MOhm

阅读全文 >>

电工基础2026-03-07

心型闪烁灯电路 he Flashing Heart Buying a gift for someone special or a loved one can sometimes be difficult or expensive. The flashing heart is the answer. It is easy to build and even the inexperi

阅读全文 >>