1 Watt LED Driver circuit using IC AMC 7135

3 Watt LED Driver circuit using IC AMC 7135

Flame Sensor using Photodiode

Fuse blown indicator Circuits

Heat Monitor

When the heat near the NTC Thermistor above the preset level, Red LED lights. Adjust the 100 K preset to set the heat level. Ideal to use in Amplifiers and heat generating devices. When the heat increases above the set level, Thermister conducts and pulls the base of PNP transitor BC557 to ground. Transitor conducts and LED lights. Circuit can be connected to the same power supply of the device itself working in a voltage range of 5 to 12 volts.