Reminiscent of the very best analogue apps notes, the data sheet for Linear Tech’s rather interesting LTC6992 six pin oscillator/PWM includes a delightful collection of circuits.
I particularly like the Wide Range LED Dimming (0 to 85000 Cd/m2 Brightness – page 29), even though I have still to fathom how control transfers between the two control circuits.
The 6992 is part of a neat little cluster of six pin temporal building blocks, called TimerBlox, that rely on silicon rather than capacitors to set periods.
I feel, at last, there is a worthy successor to Hans Camenzind’s venerable 555 within this family.
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