This is a simple up and down counter that can be operated using a four-channel RF remote. The 74LS192/CD40192 counter chip is used in this gadget. The 74LS192/CD40192 chip is triggered by a NE555 (in monostable mode). The 4511 chip controls a seven-segment display.
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This COMMON CATHODE seven-segment display is made up of 29 pieces of 5mm LEDs. There is also a driver for this display. This is an excellent exercise for students interested in understanding how a seven-segment display and its driver work. CD4026 is used in the display driver, which has previously been used in our up counter modules.
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