2. 8inch 4 Wire Resistive Touch Screen

4-Wire resistive touch screen is the preferred solution for low cost applications. It consists of a conductive bottom layer (ITO Glass or Film) and aconductive top layer (ITO Film) . The two layers are suspended by many very small spacer dots. When a certain point is touched, the top layer contacts the bottom layer and a voltage charged by the controller is applied to the bottom layer's electrodes. The coordinate X axis of the touch point can be detected by measuring the voltage value thru the top ITO layer and the coordinate Y axis of the touch point can be detected in the same way by changing voltage input to the top layer's electrodes. SpecificationCircuiting Rating: 5V DC, 35mASurface Hardness: 3HLight Transmission: Film + Film > 75% Hitting Life Expectancy: Over 1 millionFilm + Glass > 80% Scoring Life Expectancy: Over 100, 000Contact Bounce:
2. 8inch 4 Wire Resistive Touch Screen