diff --git a/tech/embedded.wiki b/tech/embedded.wiki
index 4015335..2eb06ff 100644
--- a/tech/embedded.wiki
+++ b/tech/embedded.wiki
@@ -27,8 +27,20 @@ user, sometimes so that they don't even know there is a computer
 
 === Components ===
 
+
+==== Sensors ====
+
 * [[DHT11]]
 
+==== Radio ====
+
+* [[nRF24]]
+
+==== Power regulation ====
+
+* [[TP4056]]
+* [[TPS76933DBVR]]
+
 === Programming ===
 
 * [[../lang/C|C]]