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Random Flasher Relays using CD4060 IC
4x Dual Channel OP-AMP IC NJM4560D, NJM4560, JRC 4560D | eBay
NJM 4560 D IC 4560D 8-DIP JRC NJM4560D STEREO PREAMPLIFIER
#4558D,4558 ic full diagram /4558D circuit diagram/Mr electro - YouTube