Paper circuits GIF's, Ohm's law, schematic circuit
Intro
I haven't done this assignment at school but during the Corona virus at home. So I didn't have a coin cell battery at home and a piece of velostat, instead I used a normal battery (3x AA) and a piece of ESD foam for the sensor.
I also couldn't measure the values of the circuit because I don't have a multimeter at home.
Paper circuits
Standard paper circuit
The circuit starts at the + of the battery, the current goes through the LED and then the 220 ohm resistor reduces the current flow and then the circuit ends at the - side of the battery.
This was my setup for the paper circuit with the LED and 220 ohm resistor:
Paper circuit switch, Dusanka, 2020
Paper circuit switch, Dusanka, 2020
Sensor paper circuit
For this circuit I've used ESD foam for the pressure sensor instead of velostat to connect the 2 conductive traces. The harder you press on the sensor the more resistance flows through the circuit.
Unfortunately it didn't work and i'm not exactly sure why. I've connected the LED's + on the right side and the trace was smooth (no rips in the tape). I also made sure that the copper tape was under the sensor.
Paper circuit sensor, Dusanka, 2020
Ohm's Law explained
Ohm's Law shows a relationship between the voltage (V/U) and the current (A/I) in an electrical circuit.
The current passing through a resistor between two points is related to the voltage difference between two points, and are related to the resistance (R/ohm) between two points.
It is important because with Ohm's Law you can control the amount of current in a circuit, adding resistors to reduce the current flow and taking them away to increase the amount of current.
