diff --git a/hardware/lib/footprints/capacitor_470uF-electrolytic_kemet_ESK-E3.rb b/hardware/lib/footprints/capacitor_470uF-electrolytic_kemet_ESK-E3.rb
new file mode 100755
index 0000000..ff47cfb
--- /dev/null
+++ b/hardware/lib/footprints/capacitor_470uF-electrolytic_kemet_ESK-E3.rb
@@ -0,0 +1,56 @@
+#!/usr/bin/env ruby
+# encoding: utf-8
+# written for ruby 2.1.0
+# generate a footprint (see script for more information)
+require_relative 'element'
+
+# global dimensions
+UNIT = "mm"
+SILKSCREEN = 0.2
+SOLDERMASK = 0.1
+
+# class properties, for radial leads and perpendicular parts
+classes = []
+classes << {:class => "least", :hole => 0.15, :ring => 0.3, :clearance => 0.5}
+classes << {:class => "nominal", :hole => 0.2, :ring => 0.35, :clearance => 0.7}
+classes << {:class => "maximum", :hole => 0.25, :ring => 0.5, :clearance => 1.0}
+
+# size code dimensions
+D = 6.3
+p = 2.5
+d = 0.5
+
+classes.each do |cla|
+  base = File.basename(__FILE__,".rb")
+  name = "#{base}_#{cla[:class][0,1].upcase}.fp"
+  File.open(name,"w") do |fp|
+    # put some information
+    fp.puts "# footprint for an aluminum electronlytic capacitor"
+    fp.puts "# manufacturer: Kemet"
+    fp.puts "# series: ESK"
+    fp.puts "# size code: E3"
+    fp.puts "# datasheet: http://www.kemet.com/docfinder?Partnumber=ESK477M6R3AE3AA"
+    fp.puts "# class: #{cla[:class]}"
+
+    # define element
+    # center is pin 3
+    fp.puts element("Element",["","capacitor","","Kemet ESK E3 #{cla[:class]}",:"0",:"0",:"0",:"0",:"0",:"100",""])
+    fp.puts "("
+
+    # outline
+    #ElementArc [X Y Width Height StartAngle DeltaAngle Thickness]
+    fp.puts element("ElementArc",[0,0,D/2,D/2,:"0",:"360",SILKSCREEN])
+    #ElementLine [X1 Y1 X2 Y2 Thickness]
+    fp.puts element("ElementLine",[-D/2-1,0,-D/2-0.5,0,SILKSCREEN])
+    fp.puts element("ElementLine",[-D/2-0.75,-0.25,-D/2-0.75,0.25,SILKSCREEN])
+    fp.puts element("ElementLine",[D/2+1,0,D/2+0.5,0,SILKSCREEN])
+
+    # pins
+    # Pin [rX rY Thickness Clearance Mask Drill "Name" "Number" SFlags]
+    fp.puts element("Pin",[-p/2,0,d+cla[:hole]+cla[:ring],d+cla[:hole]+cla[:clearance],d+cla[:hole]+cla[:ring]+SOLDERMASK,d+cla[:hole],"+","1","square"])
+    fp.puts element("Pin",[p/2,0,d+cla[:hole]+cla[:ring],d+cla[:hole]+cla[:clearance],d+cla[:hole]+cla[:ring]+SOLDERMASK,d+cla[:hole],"-","2",""])
+
+    # end of element
+    fp.puts ")"
+  end
+end
diff --git a/hardware/lib/footprints/capacitor_470uF-electrolytic_kemet_ESK-E3_L.fp b/hardware/lib/footprints/capacitor_470uF-electrolytic_kemet_ESK-E3_L.fp
new file mode 100644
index 0000000..9e7577a
--- /dev/null
+++ b/hardware/lib/footprints/capacitor_470uF-electrolytic_kemet_ESK-E3_L.fp
@@ -0,0 +1,15 @@
+# footprint for an aluminum electronlytic capacitor
+# manufacturer: Kemet
+# series: ESK
+# size code: E3
+# datasheet: http://www.kemet.com/docfinder?Partnumber=ESK477M6R3AE3AA
+# class: least
+Element["" "capacitor" "" "Kemet ESK E3 least" 0 0 0 0 0 100 ""]
+(
+ElementArc[0.0mm 0.0mm 3.15mm 3.15mm 0 360 0.2mm]
+ElementLine[-4.15mm 0.0mm -3.65mm 0.0mm 0.2mm]
+ElementLine[-3.9mm -0.25mm -3.9mm 0.25mm 0.2mm]
+ElementLine[4.15mm 0.0mm 3.65mm 0.0mm 0.2mm]
+Pin[-1.25mm 0.0mm 0.95mm 1.15mm 1.05mm 0.65mm "+" "1" "square"]
+Pin[1.25mm 0.0mm 0.95mm 1.15mm 1.05mm 0.65mm "-" "2" ""]
+)
diff --git a/hardware/lib/footprints/capacitor_470uF-electrolytic_kemet_ESK-E3_M.fp b/hardware/lib/footprints/capacitor_470uF-electrolytic_kemet_ESK-E3_M.fp
new file mode 100644
index 0000000..83cc919
--- /dev/null
+++ b/hardware/lib/footprints/capacitor_470uF-electrolytic_kemet_ESK-E3_M.fp
@@ -0,0 +1,15 @@
+# footprint for an aluminum electronlytic capacitor
+# manufacturer: Kemet
+# series: ESK
+# size code: E3
+# datasheet: http://www.kemet.com/docfinder?Partnumber=ESK477M6R3AE3AA
+# class: maximum
+Element["" "capacitor" "" "Kemet ESK E3 maximum" 0 0 0 0 0 100 ""]
+(
+ElementArc[0.0mm 0.0mm 3.15mm 3.15mm 0 360 0.2mm]
+ElementLine[-4.15mm 0.0mm -3.65mm 0.0mm 0.2mm]
+ElementLine[-3.9mm -0.25mm -3.9mm 0.25mm 0.2mm]
+ElementLine[4.15mm 0.0mm 3.65mm 0.0mm 0.2mm]
+Pin[-1.25mm 0.0mm 1.25mm 1.75mm 1.35mm 0.75mm "+" "1" "square"]
+Pin[1.25mm 0.0mm 1.25mm 1.75mm 1.35mm 0.75mm "-" "2" ""]
+)
diff --git a/hardware/lib/footprints/capacitor_470uF-electrolytic_kemet_ESK-E3_N.fp b/hardware/lib/footprints/capacitor_470uF-electrolytic_kemet_ESK-E3_N.fp
new file mode 100644
index 0000000..91d5f2b
--- /dev/null
+++ b/hardware/lib/footprints/capacitor_470uF-electrolytic_kemet_ESK-E3_N.fp
@@ -0,0 +1,15 @@
+# footprint for an aluminum electronlytic capacitor
+# manufacturer: Kemet
+# series: ESK
+# size code: E3
+# datasheet: http://www.kemet.com/docfinder?Partnumber=ESK477M6R3AE3AA
+# class: nominal
+Element["" "capacitor" "" "Kemet ESK E3 nominal" 0 0 0 0 0 100 ""]
+(
+ElementArc[0.0mm 0.0mm 3.15mm 3.15mm 0 360 0.2mm]
+ElementLine[-4.15mm 0.0mm -3.65mm 0.0mm 0.2mm]
+ElementLine[-3.9mm -0.25mm -3.9mm 0.25mm 0.2mm]
+ElementLine[4.15mm 0.0mm 3.65mm 0.0mm 0.2mm]
+Pin[-1.25mm 0.0mm 1.05mm 1.4mm 1.15mm 0.7mm "+" "1" "square"]
+Pin[1.25mm 0.0mm 1.05mm 1.4mm 1.15mm 0.7mm "-" "2" ""]
+)
diff --git a/hardware/lib/symbols/capacitor_470uF-electrolytic_kemet_ESK477M6R3AE3AA.sym b/hardware/lib/symbols/capacitor_470uF-electrolytic_kemet_ESK477M6R3AE3AA.sym
index ed1c6b2..7adf334 100644
--- a/hardware/lib/symbols/capacitor_470uF-electrolytic_kemet_ESK477M6R3AE3AA.sym
+++ b/hardware/lib/symbols/capacitor_470uF-electrolytic_kemet_ESK477M6R3AE3AA.sym
@@ -46,7 +46,7 @@ datasheet=http://www.kemet.com/docfinder?Partnumber=ESK477M6R3AE3AA
 T 0 1900 8 10 0 0 0 0 1
 farnell-id=2068936
 T 0 2500 8 10 0 0 0 0 1
-footprint=RCY250P
+footprint=capacitor_470uF-electrolytic_kemet_ESK-E3_N.fp
 T 0 2100 8 10 0 0 0 0 1
 digikey-id=399-6611-ND
 T 0 2300 8 10 0 0 0 0 1