/challenges-projects/project14/555timermadness/b/blog/posts/frequency-synthesizer-with-only-555-timersUnfortunately I&#39;m a bit late for the 555 Timer Madness competition, but seeing another entry ( 555 frequency synthesizer ) inspired me to try to build a frequency synthesizer only using 555 timers. As said in that article, the 555 can be used as a VCOen-USTelligent Community 12https://community.element14.com/challenges-projects/project14/555timermadness/b/blog/posts/frequency-synthesizer-with-only-555-timersTue, 08 Nov 2022 14:59:21 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:84af79bd-934e-414c-b917-617971bea8dedougw0<p>That is a very cool circuit. Well done.</p><img src="https://community.element14.com/aggbug?PostID=24726&AppID=388&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/challenges-projects/project14/555timermadness/b/blog/posts/frequency-synthesizer-with-only-555-timersFri, 04 Nov 2022 18:58:52 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:84af79bd-934e-414c-b917-617971bea8dedang741<p>I had heard that Hans Camenzind, the inventor of the 555 timer was also a pioneer in PLLs.&nbsp; You succeeded in bringing both these concepts together and, based on the scope capture, it looks like you got it to work as well.</p><img src="https://community.element14.com/aggbug?PostID=24726&AppID=388&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/challenges-projects/project14/555timermadness/b/blog/posts/frequency-synthesizer-with-only-555-timersFri, 04 Nov 2022 18:37:17 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:84af79bd-934e-414c-b917-617971bea8deshabaz1<p>Impressive!&nbsp;</p> <p>Would not have imagined that was possible with just 555&#39;s. Great results : )</p><img src="https://community.element14.com/aggbug?PostID=24726&AppID=388&AppType=Weblog&ContentType=0" width="1" height="1">