automation studio pneumatic valve problem

Since I couldn’t reliably make a fluidic resistor without a CNC machine, which are need for resistor-transistor logic - the most common type of logic implemented in microfluidic circuits. The 2-1 multiplexer is a universal logic element. When the non-inverted signal (S) is equal to 1 and the inverted signal (S') is 0, the 1st set of transistors open and the 2nd set remain closed, so the 1st input is connected to the output and the 2nd input is disconnected, the opposite is true when S=0 and S'=1. The transistor arengement of electronic CPL is mimicked in my design.Įach gate is a 2-1 multiplexer (2nd picture). This is because its not possible to invert a single-line signal with only N-MOS transistors, so the inverted signal has to be supplied. How Complementary Pass Transistor Logic (CPL) works:Įvery signal in this logic family is represented by 2 lines - one carrying the original signal (A) and the other carrying the complement, or inverse, of the signal (A'). Note: atmospheric pressure = logic level 0, below atmospheric pressure = logic level 1. It is essentially a break in an air-carrying channel, which can be closed by applying negative pressure to the membrane above it, causing it to deflect and create a space for air to flow through (1st picture, source), and when the pressure is removed, the valve springs back in place.

How a microfluidic transistor (fluidic N-MOS transistor equivalent) works: It is also dosn't need resistors, making it easier for me to make. In this project, RTL, which is commonly used in microfluidic logic, is replaced with Complementary Pass Transistor Logic (CPL), which has the same advantages as CMOS logic, in that it is consuming much less power than RTL, and no power at all when maintaining state. If you are just interested in making the logic gates, you can skip reading this part, but it helpsįor this next part, I will assume you are familiar with how resistor-transistor (RTL) and CMOS logic work.

Automation studio pneumatic valve problem