Security

Power supply, plus the ground, using current up to 1 Amp.Normally used, IC Regulator no. 78XX. When used to power circuits.And the short circuit that occurred.If no fuse various equipment will be damaged.But if there is an electronic fuse circuit for IC number 78XX.Then when the, short-circuit.This circuit will act to stop paying current and [...]

This circuit can be used to delay other appliances connected to the output of the relay. After working set To prevent equipment damage from pressure. Surge. The IC number is 4011 Nand Gate CMOS .When switch S1 is current through R1. To charge at C1.This takes time to fully charge, and when a voltage input [...]

This circuit prevents surges. From the opening – is switched off or power failure. The damage to electrical appliances. The circuit will switch to use a short period before Power raising circuit to go. When raising the power supply 9-volt circuit then. Circuit delay. The duration of charging C1. VR1 is adjusted with time.When C1 [...]