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Würfel (Elektronik)
» edit
» schon gefunden:
» This count would normally lie between 0 and 6, since at the leading edge of
» every 7th clock pulse, the counter is reset to zero. This is achieved as
» follows. Observe the behavior of ‘b’ segment output in the Table. On reset,
» at count 0 until count 4, the segment ‘b’ output is high. At count 5 it
» changes to low level and remains so during count 6. However, at start of
» count 7, the output goes from low to high state. A differentiated sharp
» high pulse through C-R combination of C4-R5 is applied to reset pin 15 of
» IC2 to reset the output to ‘0’ for a fraction of a pulse period (which is
» not visible on the 7-segment display).
» Pin 15 is a level-sensitive reset input. As long as it is high, the counter
» is frozen at 0. Starting at 0, segment B is high but the resistor pulls the
» right side of C4 to ground. When B goes low for numbers 5 and 6, C4's right
» side is driven below grond briefly, until it can charge up to ground
» through R5. Now both sides of C4 are at 0 V. When B goes high for a 7, both
» sides of Cr jump up. The right side of C4 now is high, and resets the
» counter to 0 through D1. When reset, the display is at 0 and B still is
» high, but R5 discharges C4, removing the high signal from the reset input
» so the counter can count again.
Ich bin sprachlos. Das klappt tatsächlich. Habe ich noch nirgendwo gesehen. Kluger Kopf, der darauf kam ![]()
Man kann ja auch den 4033 verwenden. Mit dem hatte ich aber wohl noch nie zu tun.
In der Kurzbeschreibung heißt es: "Dezimalzähler mit 7.Segment-Dekoder, Nullunterdückung"
Vielleicht kannst du hiermit sogar die Null ausblenden/überspringen ?
Viel Bastelspaß wünsche ich dir auf jeden Fall ![]()
lg
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