Direct current (dc) power system protection presents a major challenge due to its unique characteristics, namely the absence of natural zero current crossing points. Thanks to their features, dc ...

A timer-controlled doorbell device has been developed using two 555 timer ICs in monostable mode, combined with a relay ...

The integrated circuit packaging testing technology is highly demanding, and the task is arduous. The existing sorting efficiency of integrated circuit packaging testing is low, and it is difficult to ...

Core engineering plays a vital role in the construction of efficient non-fullerene acceptors. Here, we synthesized a molecule named QX, based on the core of quinoxaline, and by replacing the H atoms ...