power tester

Power Supply Tester

This little circuit enables you to measure the so-called dynamic response of a DC power supply. A power MOSFET, T1, is used to switch the supply load on and off at a user selectable rate. The response of the supply to these fast load variations is displayed on an oscilloscope. The switching rate is selected[…]

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fuse

Fuse Monitor

When an appliance ceases to operate, there may be various causes for this, one of which is the blowing of the mains fuse. The monitor proposed here contains an LED that lights when that is the case. It is suitable for use with fuses rated from mili-amperes to amperes. As long as the fuse is[…]

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