Four-bit parallel 9012 drive digital tube

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Four-bit parallel 9012 drive digital tube [Copy link]

 

Newbie asking for advice! Has anyone made a digital tube driven by four parallel 9012 transistors? ? ? ?

It’s better to have a routine!!

Thanks everyone!!!

pcf2000

I don't understand

maychang

What does it mean to "drive" the digital tube in parallel? Does it mean that the digital tube displays statically?

okhxyyo

Can you tell me your specific needs? Are you asking how to display multiple digital tubes statically?

chineseboyzxy

A quick search on the Internet will yield a lot of them... They are all very basic circuits...

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maychang posted on 2020-4-10 06:41 What does "parallel drive" digital tube mean? Does it mean that the digital tube displays statically?

Four digital tubes are driven by four 9012 transistors.

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okhxyyo posted on 2020-4-10 08:48 Can you tell me about your specific needs? Do you want to ask how to display multiple digital tubes statically?

Because I have never driven this kind of hardware, I can't think of how to drive it for a while.

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chineseboyzxy posted on 2020-4-10 09:28 You can find a lot of them online. . . . They are all the most basic circuits. . .

There are circuits for this on the Internet, but there are few programs on how to write them.

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pcf2000 posted on 2020-4-9 21:30 I don’t understand the meaning

Simply put, how to drive this digital tube

maychang

Zhonglele published on 2020-4-11 21:11 that is, four digital tubes are driven by four 9012 transistors

9012 is a PNP tube, and your digital tube must be a common anode digital tube. Connect the four 9012 emitters to the positive end of the power supply, and the collectors to the common anode end of the four digital tubes. When the 9012 base is low, the corresponding digital tube lights up.

The program is that the four 9012 bases are set to low level in turn and maintained for a period of time (it is best to use timer interrupts instead of idling delays). During this period of time, the digital tube "segment selection" outputs the character display code to be displayed.

pcf2000

Generally speaking, for multiple digital tube drivers, the hardware used is more commonly HC164 (or hc595) + triode or HC164 (HC595) + HC164 (HC595) to achieve, the rest is a matter of code, pay attention to the refresh frequency of the entire digital tube should not be lower than 24HZ. Otherwise, it will flicker

hujj

It is more convenient to use TM1628 to drive

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pcf2000 posted on 2020-4-12 22:31 Generally speaking, for multiple digital tube drivers, the most commonly used hardware is HC164 (or hc595) + triode or HC164 (HC595) + HC16 ...

This is the first time I have encountered transistor driving, so I have not written the code.

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hujj posted on 2020-4-14 08:49 It is more convenient to use TM1628 to drive

The task requires the use of a triode driver