This audible electronic spirit level circuit is extremely valuable for folks with hearing or vision imperfections. Not only that, but it is also useful for people who wish to align […]
LED Sound Level Indicator Circuit
The proposed LED sound level meter will detect the sound hitting the MIC, and indicate its volume level through an array of LED, connected as a bar graph. Circuit Description […]
Loudspeaker Power Indicator Circuit
This circuit will reveal the height level of an input signal placed on a speaker. It is mainly meant as a fool proof device when linked to an amplifier of […]
Garden Soil Moisture Status Indicator Circuit
This garden water alarm system will tell the garden owner regarding the precise moisture status of the garden soil through LED illumination and buzzer. It will indicate through an LED […]
220 V LED Indicator Circuit
This LED circuit can be used to indicate the presence of 220 V mains AC supply, without using a transformer. The long life of LEDs make them extremely appropriate for […]
Car Lamp Blown Indicator Circuit
The car lamp failure indicator circuit detailed below, includes just solitary reed-relay, one particular LED and a single resistor. It delivers a cheaper caution method. A LED is fitted in […]