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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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