Resistor on famicom to nes adapter board
Re: Resistor on famicom to nes adapter board
Yeah, same here. Now I just have to figure out how to find a replacement diode.
Re: Resistor on famicom to nes adapter board
electrical engineering schooling is totally paying off lol.
Anyways the diode your looking for is a 1N1028 as long as the colors you posted are correct. You could always use a transistor also but you'd have to have an input voltage and a pot to tweek the Av / Ic(sat).
Anyways the diode your looking for is a 1N1028 as long as the colors you posted are correct. You could always use a transistor also but you'd have to have an input voltage and a pot to tweek the Av / Ic(sat).
Re: Resistor on famicom to nes adapter board
Yeah, I took 1 EE course, it was required for ME. I kind of wish I went EE instead of ME, but oh well. Transistors was the part that confused me.
Anyway, I got the same thing 1N1028A. I'm going to have to find a data sheet to see what the specs are and see if I have something that will work.
I guess I have a general question about diodes. I measured this one to be 0.520V on the multimeter, meaning it has a 0.7 forward voltage drop, which is common. So if I find a diode with 0.7 forward voltage drop of the same type as long as its rated for similar current, it should work right?
I should really do some reading on diodes and transistors. I didn't know they were related.
Anyway, I got the same thing 1N1028A. I'm going to have to find a data sheet to see what the specs are and see if I have something that will work.
I guess I have a general question about diodes. I measured this one to be 0.520V on the multimeter, meaning it has a 0.7 forward voltage drop, which is common. So if I find a diode with 0.7 forward voltage drop of the same type as long as its rated for similar current, it should work right?
I should really do some reading on diodes and transistors. I didn't know they were related.
Re: Resistor on famicom to nes adapter board
.7 is a nominal voltage drop, it will vary between +/- 150mv or so .9 is normally not a silicone diode also it tends to be dependent on the meter you're using. I've recently got a fluke 87V and I find it get the right voltages where my old ideal meter would only get + - like 30% of the voltage when it was that low. It could also be your meters battery is close to dying.
Ether way the .5 drop could be from a lot of factors it is a 18 year old diode? check the data sheet though with .5 your mid way between silicone and germanium.
lol ill blow your mind transistors are just basically 2 diodes thus being able to work a zener as long as the circuit is biased for proper operation. Diodes have a single PN juction where a BJT has 2 PN junctions thus PNP NPN. http://www.wisc-online.com has a ton of great interactive things on diodes/BJTS/ fets/ and mosfets.
Ether way the .5 drop could be from a lot of factors it is a 18 year old diode? check the data sheet though with .5 your mid way between silicone and germanium.
lol ill blow your mind transistors are just basically 2 diodes thus being able to work a zener as long as the circuit is biased for proper operation. Diodes have a single PN juction where a BJT has 2 PN junctions thus PNP NPN. http://www.wisc-online.com has a ton of great interactive things on diodes/BJTS/ fets/ and mosfets.Re: Resistor on famicom to nes adapter board
I'm using a FLUKE117, and the diode is probably 28 years old.
I did find some charts and I checked 2 of the diodes (each from different boards a 1N102J, and a 1N1028A) I could not fine both listed on the same chart, but on 1 chart it recommended a 1N5059 for the 102, and another recommended 1N3070. a third chart also recommended 1N3070 for the 1N1028. so I guess the 1N3070 will be my starting point.
Thanks for linking the site, I will check it out. I kind of want to understand what's going on as its something I should really know. I was just reading Wikipedia about the p-n thing. It's hard to get started because there are so many varieties.
I did find some charts and I checked 2 of the diodes (each from different boards a 1N102J, and a 1N1028A) I could not fine both listed on the same chart, but on 1 chart it recommended a 1N5059 for the 102, and another recommended 1N3070. a third chart also recommended 1N3070 for the 1N1028. so I guess the 1N3070 will be my starting point.
Thanks for linking the site, I will check it out. I kind of want to understand what's going on as its something I should really know. I was just reading Wikipedia about the p-n thing. It's hard to get started because there are so many varieties.