The UVTRON tube is an ultraviolet radiation sensor. In this circuit from Radio Electronics from April 1990 we have a flame detector.
January 2017 - Mouser Electronics already has the new PMO Sonalert microphone elements from...
This configuration makes use of an LM3900 transconductance operational amplifier. The transistor can...
SST LLE Series Liquid Level Sensor Switches Available through Mouser Electronics, these solid...