diff --git a/notes.md b/notes.md
index 9e88aa147..a98cb30cb 100644
--- a/notes.md
+++ b/notes.md
@@ -128,3 +128,4 @@
 2019-07-10T03:13:00 - Refactor for clarity, might break a few tests though (cryptography)
 2019-07-10T17:51:00 - Testing bigger LLM config, referencing 'Attention Is All You Need' (cryptography)
 2019-07-24T05:29:00 - Refactor for clarity, might break a few tests though (cryptography)
+2019-08-18T17:20:00 - Experimenting with FPGA constraints (source: Trimberger 'Three Ages of FPGAs') (cryptography)