

| Subject: | Re: AFM Capacitor fix |
| From: | Larry Alofs |
| Date: | Mon, 21 Jan 2002 12:40:26 -0600 |
Looks good! Larry A. Blake Thornton wrote: > > I guess this is something i forgot from my physics/electronics class. So, > capacitance adds when put in parallel. > > have I drawn it right: > > http://sierra.westminstercollege.edu/test/diag.jpg > > thanks,blake > > On Mon, 21 Jan 2002, Larry Alofs wrote: > > > I used the 10 MFD tantalums by connecting two in parallel. (Connect the > > 2 + leads together and the 2 - leads together). If your putting it > > inside the AFM, I'm not sure about the amount of room. I put mine in > > the connector that hooks onto the AFM by stripping the insulation back a > > little on the proper two wires and soldering. The caps fit under the > > rubber boot OK. > > > > Higher voltage rating is good, if the package doesn't get too big > > physically; gives an extra safety margin and perhaps longer life. > > 16 V is OK since its a tantalum, but given a choice I'd go with 25 V. > > Stick with tantalum; best in a hostile environment, low leakage. > > > > Larry A. > > > > > > Blake Thornton wrote: > > > > > > After looking at harald_nancy page: > > > http://www.geocities.com/harald_nancy/intermitt._syndrome.htm > > > > > > i went to Radio shack to buy a capacitor. I was looking for a 16 volt, 22 > > > micro farad tantalum capacitor. Well, I couldn't find one. Here is what > > > is in the radio shack catalog (pg 270 if you have one): > > > > > > Tantalum Capacitors: > > > 10 microF, 16 WVDC (I assume WVDC means volts) <--- is this the one? > > > 1 microF, 35 WVDC > > > > > > Hi-Q ceramic discs: > > > 4.7 pF 50 WVDC > > > 47 pF 50 > > > 100 pF 50 > > > 220 pF 50 > > > 470 pF 50 > > > .047 microF 50 > > > .1 microF 50 > > > .001 microF 500 > > > .0047 microF 500 > > > .01 microF 500 > > > .01 microF 2000 > > > > > > Metal film: > > > microF WVDC > > > .01 50 > > > .022 50 > > > .047 50 > > > .1 50 > > > .22 50 > > > .01 400 > > > .1 250 > > > 1 250 > > > > > > Axial-Lead electrolytic > > > microF WVDC > > > 4.7 35 > > > 10 35 > > > 22 35 <----- is this the one, too many volts? > > > 47 35 > > > 100 35 > > > 100 35 > > > 220 35 > > > 470 35 > > > 1000 35 > > > 2200 35 > > > 4700 35 > > > 1000 50 > > > 2000 50 > > > > > > Radial-Lead electrolytic > > > microF WVDC > > > 220 16 <---- is this the one? to many farads? > > > 470 16 > > > 1000 16 > > > 4.7 35 > > > 22 35 <---- how about this one? > > > 47 35 > > > 100 35 > > > 220 35 > > > 470 35 > > > 1000 35 > > > 100 50 > > > > > > So, do I need to go somewhere else, or is the one I need here? > > > > > > blake > >
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