This 1975 tachometer for cars with platinum can serve as an idea for new projects. The components are from the era and a modern equivalent operational amplifier can be used.
We obtained this circuit from an old Argentine magazine. The circuit originally uses germanium...
We found this circuit in an old oscilloscope publication. With it, it is possible to observe the B...
This circuit makes use of comparators and common operational amplifiers, having been found in...