diff --git a/electronics/images/negative_voltage_protection.PNG b/electronics/images/negative_voltage_protection2.png
similarity index 100%
rename from electronics/images/negative_voltage_protection.PNG
rename to electronics/images/negative_voltage_protection2.png
diff --git a/electronics/index.html b/electronics/index.html
index 5f565597019a72b0e6f08efcb13d3f71f7279d55..4141aea980916f52267a0746872d4c284d412bfe 100644
--- a/electronics/index.html
+++ b/electronics/index.html
@@ -18,6 +18,9 @@ img {.center}
 <xmp id="content" theme="github" style="display:none;">
 </xmp>
 
+<script type="text/x-mathjax-config">MathJax.Hub.Config({ tex2jax: { inlineMath: [['$','$']], displayMath: [['$$', '$$']], processEscapes: true } });</script>
+<script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/MathJax.js?config=TeX-AMS-MML_HTMLorMML&amp;locale=fr"></script>
+
 <script>
 	$('#content').load("readme.md", function() {
 		// $.getScript("../strapdown.js");
@@ -28,4 +31,8 @@ img {.center}
 	});
 </script>
 
+
+
+
+
 </html>
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diff --git a/electronics/readme.md b/electronics/readme.md
index c852cb07afbb5707efe24567172165bdc8d0aef5..d30eb92b74f49c2029c2fd066376b848c6fd48e3 100644
--- a/electronics/readme.md
+++ b/electronics/readme.md
@@ -209,7 +209,7 @@ I also did a test with a brass GIK and another bullet connector (this was before
   - like this: (from http://www.ti.com/lit/ml/slua618/slua618.pdf)
   - this one looks good: [DFLS1150](https://www.diodes.com/assets/Datasheets/ds30593.pdf)
 
-<img src="images/negative_voltage_protection.png" width="300px">
+<img src="images/negative_voltage_protection2.png" width="300px">
 
 #### PMOS Re-Design?