Comparing 2 circuits (1458 and 555) that flash a led on a LDR to affect the pitch of sesame street toy guitar. First a pot for pitch control. Then the 555 at different speeds. Then 1458 at different speeds. The 1458 is smoother than the 555 and can give a nice warble effect. Both the 555 and 1458 are on a separate 9 volt source and can be used with any toy that has the LDR swap done. Plus a pot can be used with a switch to select pot or LED/LDR.
i like timers , specially the ne555 ... very informative
BaumDerProllige 2 years ago