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Text-display logic pen (CD4069) circuit diagram with gate ci

2016-12-02 09:48  
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Text-display logic pen (CD4069) circuit diagram with gate circuit
The text-display logic pen is shown in the figure, the text here does not mean high and low in Chinese, but the word h and l in English. Due to the particularity of this two-letter glyphs, you can easily use it to form logic level test with LED digital tube.