#Controlair flow arduino update#
#Controlair flow arduino full#
#Controlair flow arduino software#

The subtotal column displays the cost of the total quantity, including the extras for each component. The column to the right of cost/unit (USD) column shows the per-unit-cost of each component in the currency selected in the parameters section. The cost/unit (USD) column displays the cost per unit in U.S. It is recommended that the user always purchase a few spare parts for the cheaper large quantity components such as the capacitors. The extra column allows the user to put down a few extras for particular components. The quantities of each component are automatically generated based on the parameters. Also, the vendor numbers are the links that can be clicked to go directly to the webpage of each component. The vendor number is the number of each component that is displayed on their respective vendor’s website, which can also be used to search for each component. The supplier column shows the maker of each component. The vendor column shows the online seller for each component. The component column displays the name of each component. This is an example of the expanded subsection. UPump electronics assembly build guide.pdf UPump pneumatics assembly build guide.pdf All electronic components are off-the-shelf except for PCBA which is custom-made but can be easily outsourced for fabrication based on the provided design files.

All electrical connections between the various boards are made with stranded tinned wire (22GA for signal, 16GA for power) and screw terminal blocks. The connector is panel mounted on the rear panel, and the various circuit boards and microcontroller are internally connected via a screw terminal power block. µPump requires a 12 V, 2 A external power supply, such as a laptop power adapter. The electromechanical relay board interfaces the inlet solenoid valve and pneumatic actuators to outputs on the Arduino Mega an electromechanical relay board was chosen for convenience and provides a simple safety disconnect rather than design a solid-state power circuit interface. The 12 V to 5 V step-down board provides power to the inlet pressure sensor and inlet pressure display. Electrical power to the active components is also provided on this PCB. It includes 8 active low-pass filters, an 8-channel 12-bit ADC, four 2-channel 12-bit DACs, and precision voltage references. PCBA interfaces the pressure sensors and actuators to the microcontroller.

#Controlair flow arduino update#

The frequency response analysis better informs the upper command update limit for continuously varying pressures the settling time depends on the step and volume but can generally be guaranteed to be less than 2 s. The performance characteristics of the ControlAir pressure actuator are thus suited to applications where command pressure updates are issued at up to about 62.8 rad/s or 10 Hz as specified in Table 1. The natural frequency was estimated to be about 40.8 rad/s or 6.5 Hz, and the low-frequency in-phase response and 180° high-frequency phase lag indicate a second-order system. To estimate the natural frequency, the amplitude ratio and phase response at select frequencies were measured, as shown in Fig. 2b, from which it is evident that the positive and negative change in pressure response is somewhat different, although the response and settling times are similar. The response to a 0.5 V square wave is shown in Fig. It is evident that the response is underdamped with a settling time of approximately 0.2 s, and with a maximum slew rate of 8 bar/s. The outlet pressure response of the ControlAir model T900-CIM to a control voltage step input from 1 V to 3 V is shown in Fig. µPump provides researchers, students, and startups with a cost-effective solution for precise fluid control. µPump can be used for two-phase droplet microfluidics, single-phase microfluidics, gaseous flow microfluidics and any other applications requiring precise fluid handling. The design rationale is presented, together with documented design details and software, so that the system may be replicated or customized to particular applications. $5000 USD) is approximately a quarter, or a third of the cost of buying a high-end commercial system, respectively. $3000 USD) or an eight-channel µPump (approx. Material for building a four-channel µPump (approx. The settling time to reach 2 bar from zero and stabilize is less than 2 s.

#Controlair flow arduino full#

The pressure accuracy, stability, and resolution are 0.09%, 0.02%, and 0.02% of the full span, respectively. This mechatronic system is coined ‘µPump,’ and its performance rivals that of commercially available systems, at a fraction of the cost.

#Controlair flow arduino software#

An open-source precision pressure pump system and control software is presented, primarily designed for the experimental microfluidics community, although others may find additional uses for this precision pressure source.