UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

SiriusHardware · 21st Dec 2018, 12:39 am

300Hz strobe: Start with a common 2.457600MHz baud rate crystal, and divide it with a ripple counter down to 300Hz.

The easiest way to do that would be to use a single CMOS 4060 IC as both crystal oscillator and counter. The 300Hz output would be from pin 2 (divide by 8192), I think. Use that output to drive a LED on and off via a transistor.

21st Dec 2018, 12:39 am	#2
SiriusHardware Dekatron Join Date: Aug 2011 Location: Newcastle, Tyne and Wear, UK. Posts: 11,575	Re: More Chinese AM radio kits 300Hz strobe: Start with a common 2.457600MHz baud rate crystal, and divide it with a ripple counter down to 300Hz. The easiest way to do that would be to use a single CMOS 4060 IC as both crystal oscillator and counter. The 300Hz output would be from pin 2 (divide by 8192), I think. Use that output to drive a LED on and off via a transistor.