diff --git a/content/zettels/position_sensors.md b/content/zettels/position_sensors.md
index 747db7e..6e26839 100644
--- a/content/zettels/position_sensors.md
+++ b/content/zettels/position_sensors.md
@@ -29,11 +29,16 @@ High precision positioning sensors include:
 -   [Capacitive Sensors]({{< relref "capacitive_sensors" >}})
 -   [LVDT]({{< relref "linear_variable_differential_transformers" >}})
 -   [Eddy Current Sensors]({{< relref "eddy_current_sensors" >}})
+-   [Encoders]({{< relref "encoders" >}})
+
+<a id="org193cfb5"></a>
+
+{{< figure src="/home/thomas/Cloud/brain/charge_amplifier.png" caption="Figure 1: Figure caption" >}}
 
 
 ## Reviews of Relative Position Sensors {#reviews-of-relative-position-sensors}
 
--   Fleming, A. J., A review of nanometer resolution position sensors: operation and performance ([Fleming 2013](#orge209c43)) ([Notes]({{< relref "fleming13_review_nanom_resol_posit_sensor" >}}))
+-   Fleming, A. J., A review of nanometer resolution position sensors: operation and performance ([Fleming 2013](#org13ac724)) ([Notes]({{< relref "fleming13_review_nanom_resol_posit_sensor" >}}))
 
 <a id="table--tab:characteristics-relative-sensor"></a>
 <div class="table-caption">
@@ -72,4 +77,4 @@ Capacitive Sensors and Eddy-Current sensors are compare [here](https://www.lionp
 
 ## Bibliography {#bibliography}
 
-<a id="orge209c43"></a>Fleming, Andrew J. 2013. “A Review of Nanometer Resolution Position Sensors: Operation and Performance.” _Sensors and Actuators a: Physical_ 190 (nil):106–26. <https://doi.org/10.1016/j.sna.2012.10.016>.
+<a id="org13ac724"></a>Fleming, Andrew J. 2013. “A Review of Nanometer Resolution Position Sensors: Operation and Performance.” _Sensors and Actuators a: Physical_ 190 (nil):106–26. <https://doi.org/10.1016/j.sna.2012.10.016>.