diff --git a/notes.md b/notes.md
index ffc9768..06aa968 100644
--- a/notes.md
+++ b/notes.md
@@ -235,3 +235,4 @@
 2020-03-03T21:26:00 - Experimenting with FPGA constraints (source: Trimberger 'Three Ages of FPGAs') (pulp-runtime)
 2020-04-12T18:01:00 - Implementing approach from a new paper read last night (pulp-runtime)
 2020-04-12T17:24:00 - Implementing approach from a new paper read last night (pulp-runtime)
+2020-04-19T00:28:00 - Experimenting with FPGA constraints (source: Trimberger 'Three Ages of FPGAs') (pulp-runtime)