From: ehsjr@verizon.net   
      
   On 1/8/2023 8:21 AM, Joe wrote:   
   > Hi,   
   > I'd like to try and build a brake light flasher circuit for a motorcycle   
   (12V).   
   > Brake light should flash 3-5 times then remain on (solid red).   
   > I'm new to electronics so not everything is clear to me. Is it possible to   
   build such a circuit and remain in 12V "domain" or is it necessary to step   
   down to 5V to power an IC (a counter with a clock, for example) ?   
   > I'd like to use a 12V LED bulb (e.g. Philips Ultinon R1157), how would I go   
   about starting a design for a circuit using that bulb?   
   > I'd appreciate any constructive help in the matter.   
   > Best,   
   >   
   > Joe   
      
   If this is for learning or a fun electronics project, start with   
   the datasheet for the bulb. With the datasheet information you'll   
   learn what your circuit needs to provide to the bulb for proper   
   operation.  Then you design the circuit to provide that. And   
   yes, it can be done at 12 volts.   
      
   If you intend to actually install this on the motorcycle, you'll   
   need to consider the environment - heat and cold, sleet, rain,   
   snow, dust, mud, vibration, etc.  There will possibly be   
   legal/insurance/safety regulations that apply.   
      
   Ed   
      
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