Heat Sensor

This is the circuit of a Heat sensor that beeps when it detects heat. It is an ideal add on circuit in heat generating devices like Inverter and Amplifier. The circuit uses a NTC Thermister as Heat sensor.

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Random Flashing LED

Here is an automatic Ornamental LED lamp for decoration purpose. It automatically switches on in the evening and turns off in the morning. Each string of LED flashes at different rates giving a colorful appearance.

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