Ideas for Design Vol. 3, No. 3 (Download)

This article is part of the Ideas for Design Series: Volume 3

The Volume 3, No. 3 issue of Ideas for Design features:

• A standard, low-cost PIC microcontroller, which integrates a short block of code emulating a simple ramp-signal generator based on the venerable unijunction transistor (UJT), that's able to achieve smooth output and infinite resolution.
• A simple circuit that uses a 6-V dc supply with a PWM current-source configuration to provide efficient, adjustable dimming of a white LED over a wide range, which is needed to accommodate the unique lighting needs of an optical microscope over its magnification range from 40X to 1000X.

These links are to the articles, while the Download button provides access to the PDF eBook that collects together these articles:

• Ramp Generator Uses Microcontroller Emulation Of Unijunction Transistor
• Current Source For LED Microscope Illuminator Provides Full-Spectrum Light