can anyone help me with this, sorry for being so naive, but in this schem. ( http://mujweb.cz/jmartis/qrv4_en_final.png ) what electrical component is located off of pin 4 of the UC that almost looks exactly like a variable resistor. Also, all the capacitor labeling is odd too, 3n3? And if anyone knows a webpage or something that has every symbol on it for everything that would be wonderful! thank you!
There is a "pot" variable resistor labeled "power limited set".
There another pot labeled "f" for frequency. It sets the frequency.
3n3=3.3nF (.) Is hard to see and sometimes does not make it through a copy machine. That is why .1uf is often written 0.1uf.
3R3=3.3 ohms
33R=33 ohms
3k3=3.3k ohms
I like the idea of using other than a period. R, C, K, M, ..........