Is it okay to use Polarized Electrolytic Capacitors instead of Ceramic ones?


Joined Sep 20, 2005
It would be better to use ceramic, and also for the 10uf and 1uf cap as well.
Another problem would be that a 220nF electrolytic will be very hard to find, because very few manufacturers make electrolytics below 1uF.


Joined Feb 24, 2006
You definitely do not want to do that. Ceramic capacitors have tighter tolerances and temperature coefficients than Electrolytics. The tolerance on capacitance for an Electrolytic is typically +20%, -80%


Joined Mar 14, 2008
Electrolytics are polarized and have poorer characteristics compared to ceramics, so they are usually only used for coupling and filtering,
Why do you want to use electrolytics instead of ceramics?


Joined Sep 17, 2013
It looks like a typical Instructables circuit :rolleyes:. If the opamps are LM358 (the text is too small to read clearly), does the circuit designer explain why only half of each IC is used, why unused opamps have floating inputs, or why the non-inverting inputs of some opamps are grounded via a resistor whereas others are grounded directly?