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how to simulate trafic light one way using one hot one coding.

use a timer
2y
@copilot use only 3 states. Green then Yellow then Red then it returnes to grren
2y
From your message, it sounds like you're interested in constructing a circuit that cycles through three states (green, yellow, red) and then returns to the green state. A simple way to achieve this is with a microcontroller, e.g. an Arduino, and a tri-color LED, or three separate LEDs (Green, Yellow, Red).
However, if you're looking for a more analog design, you could use a 555 timer in astable mode, a counter, and a decoder to drive the LEDs.
Let me know, which method would you prefer to use: microcontroller-based or a 555 timer-based circuit? By selecting one of these methods, I can give you clearer instructions on how to add the components to the Flux project.
2y
Sure, let's design a simple timing circuit using a 555 Timer, a CD4017 Decade Counter, and a 74HC238 3-to-8 line decoder to control three distinct LEDs (green, yellow, red).
Here are the components you will need to add to your project in Flux:
  • 1 x NE555 Timer IC
  • 1 x CD4017 Decade Counter IC
  • 1 x 74HC238 3-to-8 line Decoder IC
  • 3 x LEDs (1 green, 1 yellow, 1 red)
  • 3 x 220Ω resistors for the LEDs
  • 1 x 10KΩ resistor
  • 1 x 100uF capacitor
  • Connection wires
Once you added these components to your Flux project, here's a simple way to wire them:
Note: The designator will follow the pattern "Xn" for ICs "Rn" for resistors, "Cn" for capacitors, and "LEDn" for LEDs.
  1. Connect pin 8 of the 555 timer (X1) to Vcc and pin 1 to ground.
  2. Connect pin 2 of X1 to pin 6 of X1.
  3. Place C1 between pin 2 of X1 and ground.
  4. Place R1 between pin 7 of X1 and Vcc.
  5. Connect pin 3 of X1 to pin 14 (Clock input) of the CD4017 (X2).
  6. Ground pin 8 and connect pin 16 of X2 to Vcc.
  7. Connect pins 2, 3, and 4 (the Q outputs) of X2 to - respectively - pins 4, 5, and 6 of the 74HC238 (X3).
  8. Connect pin 16 (Vcc) of X3 to Vcc, and pins 6, 7, and 8 to ground.
  9. Connect the anodes of the LEDs (LED1, LED2, and LED3) to pins 9, 10, and 11 of X3 through - respectively - resistors R2, R3, and R4. Connect the LED cathodes to Ground.
Remember to use a power supply that matches the requirements of your components. A supply of 5V to 9V should be suitable in most cases.
These instructions should create a circuit that sequences through each LED in continuous rotation: Green, then Yellow, then Red, then back to Green.
These assumptions are made based on standard component values and may need to be updated based on your specific requirements. Do let me know if you have any questions or if there's anything more you'd like to add.
2y
@copilot use a timer
2y
@copilot how to simulate trafic light one way using one hot one coding.
2y
To simulate a traffic light using one-hot encoding, we'll need a state machine circuit that will cycle through the four states of a standard traffic light:
  1. Red
  2. Yellow transitioning to Green
  3. Green
  4. Yellow transitioning to Red
Each of these stages will correspond to one-hot coding value. So, if we assign the states bits as follows:
  • Red: 1000
  • Yellow to Green: 0100
  • Green: 0010
  • Yellow to Red: 0001
We can design our circuit using D flip-flops and logic gates to transition through these stages. Here's our assumption; we assume that clock pulses are used to change states.
Our digital logic circuit can be set up using Flux as follows:
Components needed
  • Four D-type Flip-Flops.
  • Several logic gates (AND, OR) for generating the state changing conditions.
  • Three LEDs (Red, Yellow, Green) to represent the traffic light.
Connection Details:
Note: The naming convention Qn corresponds to each flip flop state and the LED colour it controls.
  1. Connect the input of D-flip flop (Q0) to the output of Q3.
  2. Connect Q0 to D1. This will be a direct connection for transition to the next state.
  3. Use an AND gate for the next connections. Connect Q1 and Q0 as inputs to the AND gate, and then connect the output of the AND gate to D2.
  4. For the final transition, connect Q2 and Q0 as inputs to another AND gate, and then connect the output of this AND gate to D3.
  5. Connect the reset pins of all D flip flops (active low) together as they all have to switch simultaneously.
  6. Connect the output of each D flip flop (namely Q0, Q1, Q2 and Q3) to the LED corresponding to each state of the traffic light(Assuming Q0->Red, Q2->Yellow, Q1 and Q3 ->Green).
Please note that the transition implementation might vary depending on the exact model of D flip-flops and the logic used. So, adapt this design to fit with the specific components you are using. The duration for which each light displays can be controlled by the frequency of the clock signal coming in. Higher frequency (more frequent clock pulses) would change the states faster and vice versa.
2y
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