This circuit generates signals of less than 10 Hz. We found it in a Popular Electronics from the 90s. C1 and C2 is 1 000 uF and L1 is 1 H.

This circuit generates signals of less than 10 Hz. We found it in a Popular Electronics from the 90s. C1 and C2 is 1 000 uF and L1 is 1 H.