mstechca
New Member
I made some changes to my circuit, and I have upped the resistance values, and I can't seem to get it to change stations. In order for me to change stations, I connect the TRIG input to ground, which creates a keypress.
The pull-up resistor is 27K.
The only diode that seems to work the best is 1N914B.
I think before I continue, I need to know:
1. what is the absolute MAXIMUM current the 1N914B can handle?
2. what is the absolute MINIMUM current the 1N914B can handle?
3. what is the absolute MAXIMUM voltage the 1N914B can handle?
4. what is the absolute MINIMUM voltage the 1N914B can handle?
I think that once I get the above 4 answers, I can adapt my circuit to any diode. what do you guys think?
and yes, a high coupling capacitor seems to make sense, so I'm going with 300pF to 1000pF.
btw, the rest of my radio circuit (including the shown tank circuit) works great.
I can easily tune by adjusting the trimmer, but I want to tune with the varicap as well.
someone please give me some insight.
The pull-up resistor is 27K.
The only diode that seems to work the best is 1N914B.
I think before I continue, I need to know:
1. what is the absolute MAXIMUM current the 1N914B can handle?
2. what is the absolute MINIMUM current the 1N914B can handle?
3. what is the absolute MAXIMUM voltage the 1N914B can handle?
4. what is the absolute MINIMUM voltage the 1N914B can handle?
I think that once I get the above 4 answers, I can adapt my circuit to any diode. what do you guys think?
and yes, a high coupling capacitor seems to make sense, so I'm going with 300pF to 1000pF.
btw, the rest of my radio circuit (including the shown tank circuit) works great.
I can easily tune by adjusting the trimmer, but I want to tune with the varicap as well.
someone please give me some insight.