18V Auto LED Tree Circuit

Christmas tree LED circuit diagram using an 18 V DC input instead of 24 V DC. Requirements: - Input: 18 V DC - Four LED groups, each containing five LEDs in series: red, yellow, green, and blue - Three lighting modes that automatically cycle: 1. STEADY — all LED groups continuously ON 2. BLINK — all LED groups blink together at a normal speed 3. SLOW — all LED groups blink together at a slower speed - No manual buttons or mode selection switches - Use a 555 timer and a TIP122 transistor if suitable. Please correct the entire circuit and verify: 1. The LED groups are powered from the appropriate 18 V supply path, with proper switching. 2. The TIP122 is connected correctly as a low-side switch if suitable. 3. The 555 timer has correct pin connections and timing components. 4. The circuit includes the necessary control components to automatically cycle through all three modes. 5. Each LED group has a correctly calculated current-limiting resistor based on the LED forward voltage and safe current. 6. The voltage regulator is suitable for the 18 V input and the control circuit's required voltage. Do not simply change the input label from 24 V to 18 V. Recalculate the resistor values and verify the circuit's electrical operation. Generate a clean, readable corrected schematic with component values, pin numbers, positive and negative supply rails, and a component list. Explain any assumptions about the LED specifications. Important: Do not claim that a single 555 timer with one fixed timing network automatically provides three different lighting modes. Include the additional control circuitry required for automatic mode cycling. Generate the picture Remove the selector

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