diff --git a/README.org b/README.org
index 934dc9d..9d377ab 100644
--- a/README.org
+++ b/README.org
@@ -32,6 +32,7 @@ Functional groups
 |---------+----------------------------+---------+------------+-----------+-------------|
 | S-110   | Quad CV Mixer              |   0.2.1 | x          | x         |             |
 | S-111   | Dual Attenuverter + Offset |   0.1.0 | x          |           |             |
+| S-121   | 40106 Hex Oscillator       |   0.1.0 | x          |           |             |
 | S-127   | White+Pink+Blue Noise      |         |            |           |             |
 | S-128   | S&H + Noise Gen            |         |            |           |             |
 | S-130   | LFO                        |         |            |           |             |
diff --git a/modules/s-121/s-121-schematic.pdf b/modules/s-121/s-121-schematic.pdf
new file mode 100644
index 0000000..1bfbfbb
Binary files /dev/null and b/modules/s-121/s-121-schematic.pdf differ