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Check out another newly-uploaded Design Idea designed to give circuit building inspiration.It involves simple 'toggle' circuits to demonstrate the low gate leakage of modern power MOSFETs.
The Design Idea begins:
The novelty circuit in Figure 1 illustrates the extremely low gate-leakage current typical of modern power MOSFETs. You can find parts that, in a moderately dry environment, will hold their state for days at a time. In operation, if MOSFET Q1 is off, the load - perhaps a lamp or a buzzer - pulls Q1's drain to nearly the 12V-dc power-supply voltage. R2 charges C1 to practically the same voltage.Read the full Circuit Design Idea
It is courtesy of Tom Bruhns, Mukilteo, WA (Edited by Martin Rowe and Fran Granville of EDN)
View all the Design Ideas on Electronics Weekly
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