IC 4060 Timer project
This is IC 4060 Timer circuit. When rises time that is set, Suppose set 5 minutes time. after all time to 5 minutes. the circuit will emit a sound of buzzer once.
High Temperature fire Alarm Circuit using transistors
This is high temperature fire alarm circuit, when the temperature rise exceeds the limit, it will sound the siren rang out. It is easy to use with transistor circuit to detects heat. Then, a loud noise of the sirens with IC packages. How it works We uses the combination between …
Motor burn out and under voltage protection
This is AC motor burn out protection causes of under voltage input. The principle is simple, it will check for voltage at all times. Normal voltage is 220V AC. If the voltage falls below a preset. Relay will not work and the LED is a warning. Can be set to …
AC 220V siren circuit using transistors
This AC 220V siren circuit is a simple sirenthat use 220V AC as power supply. It is small size and use a piezo speaker cause use low power and saving. How it works This circuit is shown as Figure 1 which we use power source by reducing AC-voltage of 220 …