diff --git a/cookbook/geiger-counter.rst b/cookbook/geiger-counter.rst
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+++ b/cookbook/geiger-counter.rst
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+Geiger counter RadiationD v1.1 (CAJOE)
+======================================
+
+.. seo::
+    :description: Instructions for setting up RadiationD v1.1(CAJOE) sensor in ESPHome and calculate the current radation level.
+    :image: radiationD-v1-1-cajoe_small.jpg
+    :keywords: Radiation Geiger counter
+
+With the help of :doc:`/components/sensor/pulse_counter` and the RadiationD v1.1(CAJOE) you can make your own Geiger counter, which will give you 
+a more or less precise messurement of the current radation level. But it should be good enough to warn you about critical events.  
+
+
+Assambly:
+---------
+
+.. figure:: images/radiationD-v1-1-cajoe_small.jpg
+    :align: center
+    :width: 100.0%
+
+The first step is to connect the sensor.
+
+You just need to connect the +5V, the ground and a GPIO pin to the ESP.
+In my case I used the pin 34 for the signal. (The print on the PCB is wrong VIN is the signal.)
+This setup should give you the pulse of each messurement or count. For more information check the Video of `Andreas Spiess <https://www.youtube.com/watch?v=K28Az3-gV7E>`__.
+
+Housing:
+*********
+I just 3D printed an small housing the avoid touching the high voltage Geiger Mueller tube.
+`Counter Tube Case <https://www.thingiverse.com/thing:5425224>`__
+(The tube should not be in direct sunlight. So maybe you will need another case.)
+
+
+Configuartion:
+---------------
+
+The block :doc:`/components/sensor/pulse_counter` will count the radation events per minute. 
+With the found specs of the tube you will be able to calculate the radiation in μSv/h.
+
+It's just the counts per minute (CPM) times the factor of your Geiger Mueller tube you're using. It should be the J305ß, which comes with the PCB.
+(To make sure - check your printing on the tube)
+
+μSv/h = (CPM - Tube noise) * Factor
+According to the video of `Andreas Spiess <https://www.youtube.com/watch?v=K28Az3-gV7E>`__ the tube should have about 12 CPM as background noise.
+
+.. note::
+
+    The current version of the pack comes with the J305ß Geiger tube which detectes Beta and Gamma radiation. Specifications:     
+    Manufacturer: North Optic     Radiation Detection: β, γ     Length: 111mm     Diameter: 11mm     Recommended Voltage: 350V     Plateau Voltage: 360-440V     
+    Sensitivy γ (60Co): 65cps/(μR/s)     
+    Sensitivy γ (equivalent Sievert): 108cpm / (μSv/h)     
+    Max cpm: 30000     
+    cps/mR/h: 18     
+    cpm/m/h: 1080     
+    cpm/μSv/h: 123.147092360319     
+    Factor: 0.00812037037037
+
+
+`Source: opengeiger.de/LibeliumDoku.pdf <http://www.opengeiger.de/LibeliumDoku.pdf>`__.
+
+
+.. code-block:: yaml
+
+    sensor:
+      - platform: pulse_counter
+        pin: 34
+        name: "Radiation"
+        unit_of_measurement: 'μSv/h'
+        count_mode:
+         rising_edge: DISABLE
+         falling_edge: INCREMENT
+        filters:
+          - offset: -12.0 # J305ß Geiger Mueller tube background noise 0.2 pulses / sec x 60 sec = 12 CPM (Counts per Minute)
+          - multiply: 0.00812037037037 # Factor: 0.00812037037037
+
+
+See Also
+--------
+
+- :doc:`/components/sensor/pulse_counter`
+- :ghedit:`Edit`
diff --git a/cookbook/images/radiationD-v1-1-cajoe_small.jpg b/cookbook/images/radiationD-v1-1-cajoe_small.jpg
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diff --git a/images/radiationD-v1-1-cajoe_small.jpg b/images/radiationD-v1-1-cajoe_small.jpg
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diff --git a/index.rst b/index.rst
index e60884275..4c641a688 100644
--- a/index.rst
+++ b/index.rst
@@ -756,6 +756,7 @@ Cookbook
     EPEVER Tracer, cookbook/tracer-an, tracer-an.jpg
     Ilonda Wifi Smart Fish Feeder, cookbook/ilonda-wifi-smart-fish-feeder, ilonda-wifi-smart-fish-feeder-cookbook.jpg
     AirGradient DIY Air Quality Sensor, cookbook/air_gradient_diy_air_quality_sensor, air_gradient_diy_air_quality_sensor.jpg
+    Geiger Counter, cookbook/geiger-counter, radiationD-v1-1-cajoe_small.jpg
 
 Do you have other awesome automations or cool setups? Please feel free to add them to the
 documentation for others to copy. See :doc:`Contributing </guides/contributing>`.