diff --git a/README b/README
index fcf823a..1628034 100644
--- a/README
+++ b/README
@@ -1,7 +1,7 @@
 
 heater control circuit for a low power (~40W) proofing oven. the thermistor
 element is a 10k NTC with B 25/50 constant of 3380K. Setting the trim pot
-VR1 to read 1.75V sets the hold/max temperature to within 1 degree C of 25C
+VR1 to read 1.25V sets the hold/max temperature to within 1 degree C of 25C
 (~75F)
 
 the power mosfet is an IRF530N, and as wired, max input and load of the circuit