diff --git a/Hardware_developement/Readme.txt b/Hardware_developement/Readme.txt
index e34bed9..50f27ef 100644
--- a/Hardware_developement/Readme.txt
+++ b/Hardware_developement/Readme.txt
@@ -1,3 +1,3 @@
-The folders follow the numbering for from the previous stages of development. Each folder contains PCBs (gerber, drill files and images) and/or photos of assembled and tested prototypes or components. Readme.txt file in folders presents brief overview of the contents. The project is ongoing, so this is a snap-shot of the current state. None of the PCBs and presented solutions are final and will most likely change.
+The folders follow the numbering from the previous stages of development and related documents. Each folder contains PCBs (gerber, drill files and images) and/or photos of assembled and tested prototypes or components. Readme.txt file in folders presents brief overview of the contents. The project is ongoing, so this is a snap-shot of the current state. None of the PCBs and presented solutions are final and will most likely change.
 
 Example of one working prototype of high-voltage generator is illustrated as a short film (see One_working_prototype.mp4). There are currently four classes of such prototypes, i.e., (1) resonant energy transfer, (2) audio excitation (3) flyback configuration and (4) push-pull excitation. In every class of solutions there are multiple possibilities for trafos, cascades, transistors/chips, power supply levels etc. Working solutions are currently rated based on high-voltage output level, needed power supply, the speed of pulse generation, costs, number of needed circuit elements, ease of assembly, possibility to control with microcontrollers etc. In parallel with the development of high-voltage generator battery power supply is tested, user-interface is being developed, microcontrollers are procured and will be tested, pulse shapers are designed and high-voltage switches are tested.