Methods of transmitting an receiving symbols by a Mobile Subscriber Station and a Base Station are provided. The MEA plate comprises a substrate, a first layer and a first insulating layer. An automatic calibration system avoids the use of potentiometers by inputting two known voltages into the circuit by means of a voltage divider and recording the digital output for each voltage input. The new coordinates are then sent to the image sensor. The coin bank further comprises a sensor or an IC chip for making a sound and lighting. Also described is an emittor cell comprising a receptor, wherein the receptor can be an antibody or an Fc receptor, and an emittor molecule for the detection of a target particle in a sample wherein the target particle to be detected is bound by one or more receptors on the emittor cell.