diff --git a/README.md b/README.md
index 8494b3e..12418eb 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-This firmware template is designed for development boards based around [STM32 F1 series micro-controller](http://www.st.com/web/en/catalog/mmc/FM141/SC1169/SS1031).
+This firmware is for the spark strober, using an [STM32 F1 series micro-controller](http://www.st.com/web/en/catalog/mmc/FM141/SC1169/SS1031).
 
 project
 =======
@@ -6,40 +6,63 @@ project
 summary
 -------
 
-*describe project purpose*
+The spark strober switches mains electricity.
+This allows to switch on a flood light or stroboscope for a short time to create a light pulse.
 
 technology
 ----------
 
-*described electronic details*
+components:
 
-board
-=====
-
-The current implementation uses a [core board](https://wiki.cuvoodoo.info/doku.php?id=stm32f1xx#core_board).
-
-The underlying template also supports following board:
-
-- [Maple Mini](http://leaflabs.com/docs/hardware/maple-mini.html), based on a STM32F103CBT6
-- [System Board](https://wiki.cuvoodoo.info/doku.php?id=stm32f1xx#system_board), based on a STM32F103C8T6
-- [blue pill](ihttps://wiki.cuvoodoo.info/doku.php?id=stm32f1xx#blue_pill), based on a STM32F103C8T6
-- [core board](https://wiki.cuvoodoo.info/doku.php?id=stm32f1xx#core_board), based on a STM32F103C8T6
-
-**Which board is used is defined in the Makefile**.
-This is required to map the user LED and button provided on the board
+- [blue pill](ihttps://wiki.cuvoodoo.info/doku.php?id=stm32f1xx#blue_pill), based on a STM32F103C8T6: development board to control everything
+- HLK-PM01 power module: 100-240V AC to 5V DC power supply to power the board and other peripherals (protected with a 0.25A glass fuse)
+- VS1838b: 38 kHz infrared demodulator to receive the codes from a remote control (connected using a 3.5 mm TRS jack)
+- G3MB-202P: compact 240V AC 2A solid state relay to switch mains electricity (protected with a 2A fuse)
+- infrared remote control sending NEC codes (salvages from a multimedia player)
 
 connections
 ===========
 
-Connect the peripherals the following way (STM32F10X signal; STM32F10X pin; peripheral pin; peripheral signal; comment):
+Hi-Link HLK-PM01:
 
-- *list board to preipheral pin connections*
+- AC: 100-240V AC mains
+- +Vo: 5V
+- -Vo: ground
 
-All pins are configured using `define`s in the corresponding source code.
+Omron G3MB-202P:
+
+- 1: 100-240V AC mains line input
+- 2: 100-240V AC mains line output
+- 3: 5V with 330 Ohm resistor
+- 4: blue pill, PB6
+
+VS1838b:
+
+- 1, OUT: 3.5 mm TRS jack plug, ring
+- 2, GND: ground
+- 3, VCC: 5V (with 100 nF decoupling capacitor)
+
+3.5 mm TRS jack socket:
+
+- tip: 5V
+- ring: blue pill, PB8, TIM4_CH3
+- sleeve: ground
+
+blue pill:
+
+- PB8, TIM4_CH3: IR demodulator OUT
+- PB6: SSR control
+- 5V: 5V
+- GND: ground
 
 code
 ====
 
+control
+-------
+
+Have a look at the `application.c` *ir_action* to changes the AC on/off switch animations and corresponding remote control code.
+
 dependencies
 ------------
 
@@ -86,7 +109,3 @@ USB
 ---
 
 The firmware offers serial communication over USART1 and USB (using the CDC ACM device class).
-
-You can also reset the board by setting the serial width to 5 bits over USB.
-To reset the board run `rake reset`.
-This only works if provided USB CDC ACM is running correctly and the micro-controller isn't stuck.