Hi sayzer and paul borgmeier
# Is the the schematic fragment correct?
-see attached
# What is the P/N of Q1-Q4 are they really PNP?
-TR # BC557
# What troubles are you having (i.e., does the display light up (at all)? wrong temp? junk? just missing DP?)
-found Junk display,flash ,missing dp
# Are pins 1 and 19 tied low on U2?
- yes
# are you using standard 4x7 segments LED display?
- we used standard 7 seg.
# why are you using 74HC ?
- I did follow some sample on web