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Due to the request of the people interested in this type of counter using decade counters 74LS90 only present the diagram, because many told me they could not see, really I can see it well alone is to give pause video and copy it on a sheet but hey, I also include the simulation of the same and the list of materials, the explanation lies in the video.
course if they want to know the meaning of each pin of the IC checks the sheets, the video was made by
robo3001 also remind you to feed the pins of the integrated positive pin 5 74LS90 and 74LS74 to pin 16 of the negative and the pin 10 of the 74LS90 and 74LS47 to pin 8, although not shown in the diagram have to reconnect.
Item List

Simulation



click on the image to see original size Video
contador decadas 74ls90



contador decadas 74ls90
then we will present the diagram of counter 0 to 99


Eliaz Gutierrez
Operacion Triunfo Operacion Triunfo Eliaz Gutierrez contador decadas 74ls90

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