Regardless of whether you want to effectively imitate a house fire, a campfire, or light from welding, the circuit described here fills the bill without using a microcontroller, although it does use a ...

This file type includes high-resolution graphics and schematics when applicable. 1. This voltage-to-frequency converter uses a unijunction transistor to send a pulse back to the ampâ s positive input.

My article about voltage-to-frequency converters had a figure that showed the waveform on the base of a unijunction transistor (Fig. 1). This was a PSpice waveform generated by OrCAD 9. After the UJT ...