One transistor, a single diode, and one or two additional passive parts may be connected to create an incredibly basic temperature indicator circuit. Detecting Heat with a Transistor As is […]
Indicators
Simple AC Voltage Indicator Circuit
A circuit described as the LED AC mains voltage level indicator may be used to monitor and show the current voltage status of any 220 V or 120 V mains […]
Transistorized Music Level Indicator Circuits for Amplifiers
A series of LEDs is illuminated successively in a push-pull switching fashion in response to an audio source, indicating the different intensities of the music. This type of indication is known […]