1st attempt: At the beginning, I thought the pipette dispenser aspirates/ejects the medium inside the pipette by changing the pump moving direction inside the pipette dispenser. If I added a PWM circuit into the pump control circuit to control the pump moving direction (for example, when the PWM signal is high, the pump rotates to one direction, and when the PWM signal is low, the pump rotates to another direction), it might solve the problem. Unfortunately, the pipette dispenser does not work that way. After I opened the pipette dispenser, I found that the pump inside the pipette dispenser always moves to one direction, and the aspirating/ejecting is done by mechanically pressing the valves to change the air flow direction inside the tube. I have to design something to press the up/down button mechanically.2nd attempt: I decided to use the available parts inside my lab to design a PWM circuit to control a servo to press the up/down button. The position holding time of the servo (the duration of pressing the up/down button) should be adjustable, and the rotation position of the servo should be repeatable. The circuit I designed contains two main parts: a PWM circuit to control the servo position and another PWM circuit to control the holding time.
What to do if your keyboard on the screen. And if there are dozens of screens: At CES, the Russian design Art Lebedev, the company shows upcoming Optimus Aux Optimus popularis keyboard with a mini and a series of six unique keyboard for data input devices on the key to the home screen.
Showing posts with label Automatic. Show all posts
Showing posts with label Automatic. Show all posts
Saturday, July 27, 2013
Monday, May 27, 2013
Automatic Multi-Photo Taker (Photobooth Style)
Many of these items aren't required. Mostly the Arduino parts are necessary, but you'll get to see when we use what as you continue reading.
Electronics, Hardware, and Other Equipment:
-- Arduino Uno Microcontroller
-- Motion Sensor with PIR (Sparkfun)
-- LCD Keypad Shield
-- Custom Shield
-- Camera (I used a Canon T3i)
-- Remote Switch (I used a Canon Remote Switch RS60 E3. Note that this isn't wireless)
-- Resistors: 10K, 220, 220, 100
-- Arduino Wall Adapter Power Supply
-- Arduino USB Cable (2.0)
-- RGB Controllable LED (Common Anode)
-- 1N4148 Diode
-- Ultra-miniature, Highly Sensitive SPDT Relay for Signal Circuits (G5V-1 Low Signal Relay)
-- Wires
-- HDMI Monitor
-- Mini HDMI to HDMI Cable
-- Small Circuit Board
-- Box (to contain your setup)
-- Screws and standoffs
-- Plastic Tie Locks
-- Circuit Board Tape
Tools:
-- Soldering Iron
-- Drill Press
-- Screw drivers (plus and minus)
-- Wire cutters
-- Wire strippers
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