Alternating 12V LED Flashing Circuit Using SPDT Relay for 1s On/Off Loop

The discussion focuses on designing an alternating 12V LED flashing circuit using an SPDT relay to create a 1-second on/off loop for two LEDs, where one LED is powered while the other is off, alternating continuously. The original poster seeks a relay-based solution but is unfamiliar with relay operation. Suggestions include replacing the relay with transistor-based switching to avoid relay noise and mechanical wear. Another recommendation is to use a 555 timer IC with minimal components to generate the timing pulses. However, concerns are raised about the 555 timer's maximum output current (200 mA) being insufficient for driving multiple LEDs directly, necessitating the use of power transistors and adequate heat sinking. The discussion highlights the importance of current ratings and proper component selection for reliable LED flashing circuits.
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