diff --git a/bins/more/sim.fzb b/bins/more/sim.fzb
index 5c3e723c..074106ca 100644
--- a/bins/more/sim.fzb
+++ b/bins/more/sim.fzb
@@ -44,6 +44,13 @@
+
+
+
+
+
+
+
diff --git a/core/sparkfun-poweric-transformer-pth.fzp b/core/sparkfun-poweric-transformer-pth.fzp
index 5ca1a688..8b590353 100644
--- a/core/sparkfun-poweric-transformer-pth.fzp
+++ b/core/sparkfun-poweric-transformer-pth.fzp
@@ -5,16 +5,36 @@
www.fritzing.org
Small transformers
-TRANSFORMER
+Transformer
PTH
-TRANSFORMER
+Transformer
transformer
sparkfun Transformer
pth
+10H
+40H
+1Ω
+1Ω
+
+ x{instanceTitle} {net connector0} {net connector1} {net connector3} {net connector2} basic_transformer Lin={input inductance} Lout={output inductance} Rin={input resistance} Rout={output resistance}
+ .subckt basic_transformer in1 in2 out1 out2 Lin=100u Lout=100u Rin=1 Rout=1
+* inductances
+Li in1 intin {Lin}
+Lo out1 intou {Lout}
+* coupling factors
+K1 Li Lo 1
+* series resistances
+Ri intin in2 {Rin}
+Ro intou out2 {Rout}
+* resistor to guarantee a DC path
+Rdc in1 out1 1Meg
+.ends basic_transformer
+
+
diff --git a/core/sparkfun-poweric-transformer-smd.fzp b/core/sparkfun-poweric-transformer-smd.fzp
index 0b54e557..274322b0 100644
--- a/core/sparkfun-poweric-transformer-smd.fzp
+++ b/core/sparkfun-poweric-transformer-smd.fzp
@@ -5,17 +5,37 @@
www.fritzing.org
Small transformers
-TRANSFORMER
+Transformer
-TRANSFORMER_SMD
-TRANSFORMER
+Transformer_SMD
+Transformer
SMD
transformer_smd
sparkfun Transformer
smd
+10H
+40H
+1Ω
+1Ω
+
+ x{instanceTitle} {net connector0} {net connector1} {net connector3} {net connector2} basic_transformer Lin={input inductance} Lout={output inductance} Rin={input resistance} Rout={output resistance}
+ .subckt basic_transformer in1 in2 out1 out2 Lin=100u Lout=100u Rin=1 Rout=1
+* inductances
+Li in1 intin {Lin}
+Lo out1 intou {Lout}
+* coupling factors
+K1 Li Lo 1
+* series resistances
+Ri intin in2 {Rin}
+Ro intou out2 {Rout}
+* resistor to guarantee a DC path
+Rdc in1 out1 1Meg
+.ends basic_transformer
+
+