diff --git a/embedded_programming/t1624/hello.t1624-XU/hello.t1624-XU.blink.ino b/embedded_programming/t1624/hello.t1624-XU/hello.t1624-XU.blink.ino
new file mode 100755
index 0000000000000000000000000000000000000000..7081b4057a7576285440299aa0044e83de37b933
--- /dev/null
+++ b/embedded_programming/t1624/hello.t1624-XU/hello.t1624-XU.blink.ino
@@ -0,0 +1,26 @@
+//
+// hello.t1624-XU.blink.ino
+//
+// ATtiny1624-XU blink
+//
+// Neil Gershenfeld 6/15/25
+//
+// This work may be reproduced, modified, distributed,
+// performed, and displayed for any purpose, but must
+// acknowledge this project. Copyright is retained and
+// must be preserved. The work is provided as is; no
+// warranty is provided, and users accept all liability.
+//
+
+#define LED_pin PIN_PA4
+
+void setup() {
+ pinMode(LED_pin,OUTPUT);
+ }
+
+void loop() {
+ digitalWrite(LED_pin,LOW);
+ delay(500);
+ digitalWrite(LED_pin,HIGH);
+ delay(500);
+ }
diff --git a/embedded_programming/t1624/hello.t1624-XU/hello.t1624-XU.jpg b/embedded_programming/t1624/hello.t1624-XU/hello.t1624-XU.jpg
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diff --git a/embedded_programming/t1624/hello.t1624-XU/hello.t1624-XU.kicad_prl b/embedded_programming/t1624/hello.t1624-XU/hello.t1624-XU.kicad_prl
new file mode 100644
index 0000000000000000000000000000000000000000..7e06e4d96a01bd3bb515dcb126159b8f1613836e
--- /dev/null
+++ b/embedded_programming/t1624/hello.t1624-XU/hello.t1624-XU.kicad_prl
@@ -0,0 +1,130 @@
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diff --git a/embedded_programming/t1624/hello.t1624-XU/hello.t1624-XU.kicad_pro b/embedded_programming/t1624/hello.t1624-XU/hello.t1624-XU.kicad_pro
new file mode 100644
index 0000000000000000000000000000000000000000..96ec43f4c1c7bde2c8110b8d8a8ad0932674785f
--- /dev/null
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+{
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diff --git a/embedded_programming/t1624/hello.t1624-XU/hello.t1624-XU.kicad_sch b/embedded_programming/t1624/hello.t1624-XU/hello.t1624-XU.kicad_sch
new file mode 100644
index 0000000000000000000000000000000000000000..72fc9b7b4a40c4135c84a057b5c0a71a4d109985
--- /dev/null
+++ b/embedded_programming/t1624/hello.t1624-XU/hello.t1624-XU.kicad_sch
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diff --git a/embedded_programming/t1624/hello.t1624-XU/interior.png b/embedded_programming/t1624/hello.t1624-XU/interior.png
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diff --git a/embedded_programming/t1624/hello.t1624-XU/top.png b/embedded_programming/t1624/hello.t1624-XU/top.png
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diff --git a/embedded_programming/t3226/hello.t3226-MU/hello.t3226-MU.blink.ino b/embedded_programming/t3226/hello.t3226-MU/hello.t3226-MU.blink.ino
new file mode 100755
index 0000000000000000000000000000000000000000..2252edbcee9fa38b613125b81091556973487886
--- /dev/null
+++ b/embedded_programming/t3226/hello.t3226-MU/hello.t3226-MU.blink.ino
@@ -0,0 +1,29 @@
+//
+// hello.t3226-MU.blink.ino
+//
+// ATtiny3226-MU blink
+//
+// Neil Gershenfeld 6/15/25
+//
+// This work may be reproduced, modified, distributed,
+// performed, and displayed for any purpose, but must
+// acknowledge this project. Copyright is retained and
+// must be preserved. The work is provided as is; no
+// warranty is provided, and users accept all liability.
+//
+
+#define LED_pin PIN_PC1
+#define GND_pin PIN_PB4
+
+void setup() {
+ pinMode(LED_pin,OUTPUT);
+ pinMode(GND_pin,OUTPUT);
+ digitalWrite(GND_pin,LOW);
+ }
+
+void loop() {
+ digitalWrite(LED_pin,LOW);
+ delay(500);
+ digitalWrite(LED_pin,HIGH);
+ delay(500);
+ }
diff --git a/embedded_programming/t3226/hello.t3226-MU/hello.t3226-MU.jpg b/embedded_programming/t3226/hello.t3226-MU/hello.t3226-MU.jpg
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diff --git a/embedded_programming/t3226/hello.t3226-MU/hello.t3226-MU.kicad_prl b/embedded_programming/t3226/hello.t3226-MU/hello.t3226-MU.kicad_prl
new file mode 100644
index 0000000000000000000000000000000000000000..0aa8daebfbad5cbffe0cfcf771468146707dbf4e
--- /dev/null
+++ b/embedded_programming/t3226/hello.t3226-MU/hello.t3226-MU.kicad_prl
@@ -0,0 +1,130 @@
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diff --git a/embedded_programming/t3226/hello.t3226-MU/hello.t3226-MU.kicad_pro b/embedded_programming/t3226/hello.t3226-MU/hello.t3226-MU.kicad_pro
new file mode 100644
index 0000000000000000000000000000000000000000..1e72873981dfda708b6025afd88b3d00f3aded2b
--- /dev/null
+++ b/embedded_programming/t3226/hello.t3226-MU/hello.t3226-MU.kicad_pro
@@ -0,0 +1,618 @@
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diff --git a/embedded_programming/t3226/hello.t3226-MU/hello.t3226-MU.kicad_sch b/embedded_programming/t3226/hello.t3226-MU/hello.t3226-MU.kicad_sch
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index 0000000000000000000000000000000000000000..87f71aa19facfb3b359a77a1ea340c56fc5da3e7
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