diff --git a/notes.md b/notes.md
index c64e9a0..4ed5a65 100644
--- a/notes.md
+++ b/notes.md
@@ -169,3 +169,4 @@
 2018-12-24T20:25:00 - Quick fix, referencing a known issue from the official repo (prophet)
 2018-12-24T03:05:00 - Implementing approach from a new paper read last night (prophet)
 2018-12-24T02:48:00 - Minor doc updates: linking to article on quantization (prophet)
+2018-12-24T23:44:00 - Experimenting with FPGA constraints (source: Trimberger 'Three Ages of FPGAs') (prophet)