Hello everyone,
I'm in a sort of introductory electronics course for Mech. Engineers, and our final lab project is to build an AM radio. Easy enough, but we also have to order the parts for the project, and I'm having a hard time locating some parts or finding equivalents, partly due to a lack of knowledge about what something needs to be equivalent.
The circuit I'm trying to build is detailed here:
http://www.circuitstoday.com/simple-opamp-radio#ixzz1G2OBYZ3D
I'm trying to order most parts from digi-key to save on shipping, I don't know if there would be a better place to order from. The parts I am having trouble finding are:
c1………..30-360 Pf Variable
I cannot find one with the same specs apart from one listed for $75 through google that doesn't seem like it was meant for this application. I thought I could use two 10-180pF trimmers here instead
SG3014-ND CAP 10MM 10-180PF-TOP/BOT ADJ OR
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&itemSeq=97905990&uq=634363910871594965
T1………..Sl 100 NPN Transistor or equiv.
I found a datasheet for this transistor here:
http://www.sunrom.com/files/SL100.pdf
and I can find it online, but I would like to order through digi-key
This is what I thought would work:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=ZTX453-ND
D1………..1N34 Germanium Diode
I found this online, it would be nice if it was available through Digi-key but I didn't see anything. I think the main reason for Germanium is that it has a smaller voltage step before it activates.
http://www.packetradio.com/catalog/...ucts_id=2284&zenid=o2ifm3gd08ned1scd2omeld7f3
For capacitors and resistors I opted for 1% tolerances or 10% tolerances, and 1/2 watt resistors. I thought that would be good enough for this application, and I might as well get good tolerances if I only need 4 or so.
Thanks for any input
I'm in a sort of introductory electronics course for Mech. Engineers, and our final lab project is to build an AM radio. Easy enough, but we also have to order the parts for the project, and I'm having a hard time locating some parts or finding equivalents, partly due to a lack of knowledge about what something needs to be equivalent.
The circuit I'm trying to build is detailed here:
http://www.circuitstoday.com/simple-opamp-radio#ixzz1G2OBYZ3D
I'm trying to order most parts from digi-key to save on shipping, I don't know if there would be a better place to order from. The parts I am having trouble finding are:
c1………..30-360 Pf Variable
I cannot find one with the same specs apart from one listed for $75 through google that doesn't seem like it was meant for this application. I thought I could use two 10-180pF trimmers here instead
SG3014-ND CAP 10MM 10-180PF-TOP/BOT ADJ OR
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&itemSeq=97905990&uq=634363910871594965
T1………..Sl 100 NPN Transistor or equiv.
I found a datasheet for this transistor here:
http://www.sunrom.com/files/SL100.pdf
and I can find it online, but I would like to order through digi-key
This is what I thought would work:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=ZTX453-ND
D1………..1N34 Germanium Diode
I found this online, it would be nice if it was available through Digi-key but I didn't see anything. I think the main reason for Germanium is that it has a smaller voltage step before it activates.
http://www.packetradio.com/catalog/...ucts_id=2284&zenid=o2ifm3gd08ned1scd2omeld7f3
For capacitors and resistors I opted for 1% tolerances or 10% tolerances, and 1/2 watt resistors. I thought that would be good enough for this application, and I might as well get good tolerances if I only need 4 or so.
Thanks for any input