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Controlling Plastic Injection Machine Nozzle Movement with a Digital Las...
Liquid Level Indicator Using ULN2003
A water level indicator detects and indicates the level of water in an overhead tank and relays the information back to a control panel to indicate whether the tank has a high or low water level. In this tutorial, I am going to use the ULN2003 IC to create a simple, inexpensive water level indicator. Using this circuit you can easily control the wastage of water and electricity. Watch this video, for detailed step by step instructions on how to build this circuit and to know how this circuit works. Towards the end of the video I will also discuss whether its really worth building this circuit.
All About IC UNL2003
The UNL2003 IC contains 7 High Voltage, High Current NPN Darlington Transistor Arrays each rated at 50V, 500mA in a 16-pin DIP package. You can connect the IC directly to a digital logic (like Arduino or Raspberry Pi, TTL or 5V CMOS device) without an external dropping resistor. This IC features "common-cathode flyback diodes" for switching inductive loads. The ULN2003 is known for its high current and high voltage capacity.
The Darlington pairs can be "paralleled" for higher current Output. The inputs are capable with TTL and 5v CMOS logic.
Now, let's deep-dive and check out the internals of the ULN2003 IC and how it can be used in our projects.
Arduino e ULN2003 - array di transistor - video 171
[Amazon]ステッピングモーターが届いたよ
前に買ったステッピングモーターが届きました ていうかすっかり忘れてたw 興味本位に買ってみました [amazonjs asin=”B010RYH74U” locale=”JP” title=”HiLetgo 5V ステッピングモータ+ ULN2003ドライバーボード セット 並行輸入品”] 明日がテストとか課題の提出日とかの関係で解説っぽいことはまた今度やりますが、ステッピングモーターはパルスを送るたび回転するモーターです。現在の状態からの角度が細かく出来るとか (more…)
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Homemade 3d Printed Stepper Motor (by Christopher Hawkins)