This circuit makes use of an integrated LM2907. The circuit is from an old documentation being applied to cars that still used platinum, common at the time.
This very low power circuit is based on the ICL7860. We found it in an Electronics Now from April...
September 2016 - It can be purchased by Mouser Electronics the new board from Texas Instruments...
Using JFETs, this circuit from a 90’s American documentation can generate signals of 0.15 Hz. The...