Fun with LED. Simple Design 15


LED

LED is a wonderful semiconductor without which a circuit is generally incomplete. LEDs are used mainly as indicators to show whether the output of a particular section of the circuit is working or not. Let us see some simple circuits using LEDs that you can try.
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Blown Fuse Indicators. Simple Design 10


BLOWN FUSE INDICATOR 1
Generally a Fuse is added in the power supply positive of many DC operated devices to protect them from high voltage surges. But when the device fails, we have to check the fuse to see whether it is good or blown. We can add a simple circuit to show the status of Fuse. The circuit can be hooked to the output of the power supply. Here three simple Blown Fuse Indicator circuits are given.
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