Here, another experiment of the ESTL circuit can be seen. The two parts are connected to one another with a single wire. A 1.5 volt battery and a 12 volt, 4 watt LED bulb are used as a power supply and a load respectively. First, it measures the battery voltage by a multi-meter. It can be seen that the battery voltage is about 1.4 volts. Now put the battery in battery holder. The lamp is connected to the output. Connect the power supply to the circuit. It can be seen that the lamp is turned on by connecting the power supply to the circuit. The lamp turns off when the source is disconnected from the circuit. When the source is connected again, the lamp lights up. Next, we remove the lamp from the circuit to measure the output open circuit voltage. Put the multi-meter in the range of 200 volts DC. Multi-meter connected to the output. It can be seen that the output open circuit voltage is about 17 volts.