diff --git a/notes.md b/notes.md
index 0bf4385..b3930e6 100644
--- a/notes.md
+++ b/notes.md
@@ -18,3 +18,4 @@
 2014-09-10T21:48:00 - Quick fix, referencing a known issue from the official repo (pulp-runtime)
 2014-09-11T03:32:00 - Refactor for clarity, might break a few tests though (pulp-runtime)
 2014-09-11T17:03:00 - Late-night bugfix on financial RL environment (pulp-runtime)
+2014-09-11T03:52:00 - Experimenting with FPGA constraints (source: Trimberger 'Three Ages of FPGAs') (pulp-runtime)