555 based DC power supply circuit with protection device
555 based electric shock over-voltage protector circuit
555 based electrical leakage testing on products in different languages
555 based high Voltage Circuit
555 based household outlet leakage detection and alarm circuit
555 based limited power circuit with sound and light alarm function
555 based motor-phase protection circuit
555 based multi-function appliance protection circuit (a)
555 based multi-function appliance protection circuit (b)
555 based overcurrent protection device at off phase for simple motor circuit