Task
Discussion
Submissions
Solution
All submissions

Select a Resistor to Drive an LED

LeenuJose
LeenuJose
TAR06ATDU4640

Response by EW AI Bot

  • ✅ Resistance: 464Ω (Required: 470Ω ±5%)
    - The selected value (464Ω) is within the required ±5% tolerance range of 470Ω (446.5Ω to 493.5Ω), so it is suitable for targeting ~22mA through the LED.
  • ✅ Tolerance: ±0.05% (Required: ±5% or better)
    - Much tighter than required, ensuring precise current regulation.
  • ✅ Power Rating: 0.5W (Required: ≥0.33W)
    - Exceeds the minimum specification, providing greater reliability and safety margin.
  • ✅ Mounting Type: Surface Mount (1206 package)
    - Fully meets the design requirement for surface mounting.
  • ✅ Technology: Thin Film
    - Acceptable, as either Thick Film or Thin Film is suitable.
  • ✅ RoHS Compliance: Yes
    - Environmentally compliant as requested.
Summary: All essential specifications are met or exceeded. The selected resistor is well-suited for reliable, safe LED current limiting in this 12V indicator circuit.
Upvote
Downvote

Submit Your Solution

DigiKey Part Number

Search the suitable part on DigiKey and paste the part number. Know more

EW AI

EW AI validates your selected part with expert-level precision.

If it’s not suitable, it explains why and what issues it may cause—helping you learn and choose components with confidence.