Blow Up Shield

This shield is able to controll the pump and the valve of a blood pressure meter. What you want to inflate with it, is up to you.

Intro

With this shield, you are able to controll the pump and the valve of a portable heart pressure meter, what you can buy for cheep and pump up everything, you want.

Output

The pump and valve needs 3.3 volts, therefor there is a voltage-regulator attached to the shield and with a power selector jumper, you can decide, if you want to use 5 or 3.3 volts. The pump is just a DC motor and the valve a solenoid. Diods to protect the circuit from back flowing current are also placed. The outputs are on the ports Digital 3 and Digital 6. Two LEDs near the screw-terminals show the status of this output (Yes, ON and OFF).

Input

Three analog Inputs on the PCB are placed with pin-headers. Just build in the resistors matching to your sensor. They are connected to the Analog 1 to 3.

Parts

You will need: - 2x MOS-FET IRF640N - 1x LD1117V33 - 1x Capacitor 100nF - 1x Capacitor 10uF - 3x Resistor 220 Ohm - 2x Resistor 100kOhm - 2x Resistor 100Ohm - 3x Resistor matching to your analog Sensors - 2x Diode 1A - 3x LED - 2x 8 pins male pin header - 2x 6 pins male pin header - 1x 3 pins male pin header - 2x 3 pins female pin header - one jumper - 2x 2 screw terminal (3,5mm grid)

By Stefan_Hermann
Created on September 12, 2009, 08:00

Category: Analog / Digital

Difficulty: amateurs

License:

Tags: inflate, blow up, pump, valve

Images

Files

Fritzing Files

blow_up_shield.fz

Comments

Vasi Guta # Sept. 12, 2009, 10:56 p.m.
Nice project and specially the photos. You designed your PCB for LM3940 (Input, GND, Output) I think ... LD1117 have (GND, Output, Input) pinout. You can make room on your pcb for both types, so users can have alternatives. And illustrate exactly how Fritzing can be used. I mean, without schematics yet, only breadboard and PCB are working good right now. Vasi
Stefan Hermann # Sept. 14, 2009, 9:52 a.m.
Yes, the scematic for the voltage regulator I used is not correct. I have to change it. Thanks you. On the other hand, I don't know, if it is good, if I would give options for this chip, because it could confuse the users. What voltage regulator is more common?
theyar # Nov. 13, 2009, 7:37 a.m.
Which heart rate monitor did you use? I applaud your reuse of an off-the-shelf item for this project.
Dbre # April 28, 2011, 3:25 p.m.
Hi, Is there a program required for this to run? Can't see how it works without some code on the Arduino, or is the idea to use an already developed code, that controls the motor & solenoid? cheers
Ivana # Oct. 19, 2011, 8:11 a.m.
Hey, I was wandering since I can't tell from the pictures is it only inflating, or also deflating the balloon? And which kind of pump did you use?Is it loud? And is that just a regular solenoid or a pneumatic one? I am trying to make breathing balloon, with some quiet solution, and would be grateful if you could give me an advice perhaps, since I've been trying out soo many things. Thanks.

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