Showing posts with label POWER SUPPLY. Show all posts
Showing posts with label POWER SUPPLY. Show all posts
Friday, November 2, 2012
Freeze Protector Circuit
This is the simple freeze protector circuit diagram. It is also called timing circuit. It is just hobby project for beginners. When you need to operate automatically any device in the fixed time later after coming AC power supply, you can use this circuit.
The voltage amplitude
is high when AC power come. Suddenly high voltage destroys the
electronics device. For this reason, in the time of load shedding we
need to switched off electronics device (Audio/Video player, CD/DVD
Player, TV, Freeze or any electronics device). This circuit solve this problem.
Hobby Electronics helps the beginners to know the timing circuit specially using 555 IC
timer. NE555 IC is the very simple well known parts. Its configuration
is very simple. You can use this timer any simple circuit.
In this circuit use 12volt
power supplies. 300k variable resistor is used for timing control.
Timing resistor and capacitor are 300k and 1000uF. Only change the value
of the variable resistor for your required timing.
The circuit output pin 3 is connected with resistor (10k) and output 12 volt relay. Relay is connected as figured with the device. Making cost is too low. Anyone can make this circuit easily.
Thursday, July 21, 2011
POWER SUPPLY CIRCUIT SCHEMATIC DIAGRAM
POWER SUPPLY CIRCUIT SCHEMATIC DIAGRAM
Electronic devices should be powered by direct current supply DC (direct current) which is stable in order to work properly. The battery or batteries is a source of DC power supply is best. But for applications that require greater power supply, the source of the battery is not enough. Sources of power supply is a source of alternating AC (alternating current) from power plants. This requires a power supply device that can change the AC into DC current.
Now it should not need another effort to make good pwer supplay you do not need to look for op-amps, transistors and other components, because these circuits are packaged into a single fixed voltage regulator IC. Are now widely recognized as a component of 78XX series fixed positive voltage regulator and the 79XX series is a voltage regulator to remain negative. Even these components are usually already equipped with current limiting (current limiter) and also limiting the temperature (thermal shutdown). This component is only three pins, and by adding some components alone can be a series of power supply regulation was good.
Subscribe to:
Posts (Atom)