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How to Make Chase Lights with a Decade Counter -- The Learning Circuit 74

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How to Make Chase Lights with a Decade Counter

The Learning Circuit | element14 presents |  Project Videos

 

 

Karen is making a robot with lots of flashing lights. But the Arduino she’s using to control the circuit has limited I/O. After learning about 555 timers and decade counters, Karen discovered that she can combine them to animate the lights in her robot reducing the outputs needed on the Arduino from ten, down to one. Decade Counters use a clock signal to cascade a high output signal across 10 outputs. Karen shows how to make an astable oscillator circuit with a 555 timer to create the clock signal needed for the decade counter. Then shows how to set up a circuit with 10 LEDs, one for each output. She also shows how to use transistors and relays for applications that require a higher current draw.

 

 

Bill of Material:

 

 

Product NameManufacturerQuantityBuy KitBuy Kit
74HC4017E -Decade Counter / Divider, 2 V to 6 V, DIP-16TEXAS INSTRUMENTS1Buy NowBuy Now
CD4026BE -Decade Counter / Divider, 16 MHz, 3 V to 18 V, DIP-16TEXAS INSTRUMENTS1Buy NowBuy Now
CD74HC4017E -Decade Counter / Divider, HC Family, 60 MHz, 2 V to 6 V, DIP-16TEXAS INSTRUMENTS1Buy NowBuy Now
CD4022BE -Decade Counter / Divider, 11 MHz, 3 V to 18 V, DIP-16TEXAS INSTRUMENTS1Buy NowBuy Now
CD74HCT390ECD74HCT390E - Decade Ripple Counter, HCT Family, 27 MHz, 4 Circuits, 4.5 V to 5.5 V, DIP-16TEXAS INSTRUMENTS1Buy NowBuy Now

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