Instrument principle and introduction:

The base size is 400 * 300 * 70mm, and the mold is formed as a whole. The two ends are curved and upturned at 47 degrees. The four corners of both sides are injection molded with 1.5mm foot pads, with a length of 25 * 25mm. The overall height of the instrument is 190mm. The power supply is displayed as a seven color LED with a diameter of 5mm. The LED is installed in the eye area of a small turtle with a diameter of 180 * 120 * 6mm. The turtle is installed with a connector and an M4 banana socket, which is easy to install and remove. The power supply uses three No. 7 batteries, and the electric contact area is two copper circular contact plates, The touch pad has a diameter of 80mm and a height of 45mm. It has three buttons for starting, increasing, and decreasing. The circuit is controlled by a microcontroller software, with a model of DS-425A. It carries a voltage of AC1-250V and a current of 600mA. When the current passes through the human body, the fingers will grip tightly, and the arm muscles will shake. This proves that the human body is also a conductor. Students should pay attention to electrical safety. Instrument operation:

First, place the instrument on the test bench, install 3 No. 7 batteries (pay attention to the positive and negative poles), and press the start switch. The little turtle's eyes will flash and flash (delay control for 10 seconds, if the increase button is not pressed, it will automatically power off after 10 seconds). Then, press the increase button (a total of 6 gears, pressing once represents one gear, and each press will increase the current by 10%), and you can slowly place your hand on the copper plate, feeling a weak current passing through your body, If you feel that the current is not strong enough, you can continue to increase the gear until it is suitable. Children can also hold hands to form a series circuit, which can simultaneously feel the feeling of the current passing through the human body. If you feel that the current is too strong, you can press the decrease button.

Instrument maintenance:

After use, remove the battery and place the instrument in a dry and ventilated place.

Instrument after-sales service:

Non human damage, instrument warranty for 1 year, beyond which replacement parts will be charged a certain cost.