add E1 tap hardware design
diff --git a/hardware/gerber/e1_tap.drl b/hardware/gerber/e1_tap.drl
new file mode 100644
index 0000000..e33dd86
--- /dev/null
+++ b/hardware/gerber/e1_tap.drl
@@ -0,0 +1,4 @@
+T01  0.61mm
+T02  0.80mm
+T03  0.89mm
+T04  3.25mm