Editing Basic Circuit Building Blocks
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Use this circuit when you wish to turn a load on and off with both a low voltage and a low current. Note that neither side of the load is grounded. | Use this circuit when you wish to turn a load on and off with both a low voltage and a low current. Note that neither side of the load is grounded. | ||
− | A low side switch is one which switches a circuit on and off at the ground or low side of the circuit. The advantage of a low side switch is that when using a transistor as the switch the voltage to drive the transistor is itself a low voltage. It is often the easy way to drive | + | A low side switch is one which switches a circuit on and off at the ground or low side of the circuit. The advantage of a low side switch is that when using a transistor as the switch the voltage to drive the transistor is itself a low voltage. It is often the easy way to drive leds motors and other high current devices from such low power devices as PIC output ports. Low side switche are popular and there are many integrated circuits for them as well as this circuit. |
Circuit with switch: | Circuit with switch: |