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This is how you can connect 2 half's of a CD(74HC)4520 counters to make 8 bit or more using multiple ICs. The next counter is inversed clocked using the enable pin by the last bit of the previous counter.

simulation

#4520 #counter #cmos #logic

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Decodes the "rotary encoder" to up/down trigger (turn left / turn right) using two D type flip-flop's two AND gates and 2 schmitt trigger NOT gates.

(simulation)

#74hc74 #74hc08 #74hc14 #rotary encoder #example #cmos #trigger #decoder

74HC08

Quad 2-input AND gate

Datasheet

#AND #74hc08 #datasheet #74hc #cmos #digital #logic

74HC14

Hex inverting Schmitt trigger

Datasheet

#74hc14 #datasheet #NOT #logic #cmos #digital #74hc

74HC74

Dual D-type flip-flop with set and reset; positive edge-trigger

Datasheet

#74hc74 #digital #datasheet #cmos #74hc

•18+ Adults Only

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Count up then down using the dual 4 bit 4520 counter IC and the quad 2 input XOR gate IC. It uses the XOR gates to inverse (like shown here) the clock result using the 5th bit of the counter. The 2 counters of the 4520 are connected to receive a 5th bit.

simulation

#74hc4520 #74hc86 #cmos #digital #logic #counter #example

74HC4520

Dual 4-bit synchronous binary counter

Datasheet

example use:

Count Up then Down

#cmos #digital #counter #74hc4520 #chip #ic #datasheet

74HC86

Quad 2 input XOR gate

Datasheet

example use:

4bit bus inverter

Count Up then Down

#cmos #74hc86 #logic #XOR #digital #datasheet

4 bit bus inverter

The quad 2 input XOR CMOS IC can be used to invert bits dynamicly

#74hc86 #cmos #logic #digital #bus #bits #example

74HC4066

Quad single-pole single-throw analog switch

Datasheet

example use:

Digital Resistor

#datasheet #ic #chip #switch #analog #cmos

•18+ Adults Only

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A 4 bit digital resistor using a 4066 cmos IC. The arrows are the poles. Multiple of these can be connected to get a higher resolution. The values of the passive resistors are an example. They need to be exponential. To get a 8 bit resistor using 2 ICs, for a final value of 0K to 255K the values need to be 1K,2K,4K,8K and 16K,32K,64K,128K

#cmos #analog #switch #4066 #74hc4066 #example

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