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--></style></head><body lang=FR-CA link="#0563C1" vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>I think you‘ll get in trouble using a single 555 to do what you need.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>But using 2 CMOS IC’s like the CD4049 and a CD4017 you’ll do what you need.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>Making a slow oscillator with one of the 4049 inverter (or a small transistor wired to oscillate),<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>Then wiring a 4017 so it will reset after 3 consecutive outputs<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>(wiring output ‘4’ pin 7 to reset pin 15).<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>Make sure pin 13 is wired to the GND.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>The first 3 outputs (pins 3,2,4) will do the GREEN,YELLOW,RED.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>But since the CD4017 cannot sink or supply enough current<br>to lite 12v bulbs just use 3 transistors to drive them from the 4017 outs.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>But a small PIC would easily do that job with 3 transistors..<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=FR style='font-size:11.0pt;font-family:"Calibri",sans-serif'>De :</span></b><span lang=FR style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Synth-diy <synth-diy-bounces@synth-diy.org> <b>De la part de</b> david walker via Synth-diy<br><b>Envoyé :</b> 14 décembre 2025 08:58<br><b>À :</b> synth-diy@synth-diy.org<br><b>Objet :</b> [sdiy] traffic lights<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif'>Hello hope sum one can help but i got sum </span><span style='font-size:10.5pt;font-family:"Arial",sans-serif;color:#191919'>Grain of Wheat Bulbs 12V red yellow and green so you can see were i am going with them what i would like to does any have any simple designs like using a 555 or sum other essay to use compotes so make a set of traffic lights so any help would be a big thanks </span><span style='font-size:10.5pt;font-family:"Arial",sans-serif;color:#191919'><img width=16 height=16 style='width:.1666in;height:.1666in' id="_x0000_i1025" src="https://s.yimg.com/nq/yemoji_assets/latest/yemoji_assets/1f642.png" alt=Emoji></span><span style='font-size:10.5pt;font-family:"Arial",sans-serif;color:#191919'> </span><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif'><o:p></o:p></span></p></div></div></div></body></html>