diff --git a/README.md b/README.md
index 10b5b33..687c31a 100644
--- a/README.md
+++ b/README.md
@@ -9,12 +9,11 @@
 
 This is my “Hello World” hardware project on the new ToGo-Lab server. Years ago I built a tiny Morse throwie: ATtiny + one LED + one resistor, plus firmware. This version adds a supercapacitor and small solar cells. It uses the LED as a light detector, so it only blinks in the dark.
 
-It’s not a throwie anymore. Hang it anywhere with decent light (for charging) and dry conditions and let it blink Morse on its own during night.
+It's not a throwie anymore. Hang it anywhere with decent light (for charging) and dry conditions and let it blink Morse on its own during night.
 
 Goal: a beginner-friendly DIY kit with clear docs and hackable firmware.
 
-
-Checkout also the [blog about this project](https://togo-lab.io/)
+Checkout also the [blog about this project](https://https://togo-lab.io/?p=82)
 Suggestions welcome. Open an issue or email [tgohle@togo-lab.io](mailto:tgohle@togo-lab.io).
 
 ---
@@ -24,7 +23,7 @@ Suggestions welcome. Open an issue or email [tgohle@togo-lab.io](mailto:tgohle@t
 0001_FireFly/
 ├─ KiCad/            # .kicad_pro, schematic, PCB, fabrication outputs
 ├─ CAD/              # 2D/3D mechanical drawings, panel outlines (if any)
-├─ Programm/         # firmware source, hex, Makefiles / Arduino sketches
+├─ Program/          # firmware source, hex, Makefiles / Arduino sketches
 └─ Documentation/    # assembly guide, quick start, FAQ, photos, BOM CSV
 ```
 
@@ -33,40 +32,19 @@ Suggestions welcome. Open an issue or email [tgohle@togo-lab.io](mailto:tgohle@t
 ## Hardware
 - **MCU**: ATtiny45/85 (internal RC clock, no crystal).  
 - **I/O**: 1× LED + series resistor. Unused pins broken out to breadboard-style pads.  
-- **Programming**: external ISP programmer via Arduino IDE; PDIP-8 ATtiny45/85 footprint.  
+- **Burning Attiny**: external ISP programmer via Arduino IDE; PDIP-8 ATtiny45/85 footprint.  
 - **Power**: 3V DC (coin cell & & solar cell + supercapacitor with Schottky diodes to extend battery power).  
 - **Safety**: low voltage only. Observe polarity.  
-- **PCB**: hackable; access to unused ATtiny pins.
-
-> PCB notes: big pads for beginners, clear silks, LED polarity marks, ISP near board edge for pogo-clip.
+- **PCB**: hackable; access to unused ATtiny pins. (big pads for beginners, clear silks, LED polarity marks)
 
 ---
 
-## KiCad
-- **Version**: 7.x or newer recommended.  
-- Open `0001_FireFly/KiCad/ToGo-Lab_FireFly.kicad_pro`.  
-- Run ERC/DRC and fix errors before fabrication.  
-- Plot: Gerbers + drill. Add a README in `KiCad/fab/` with board thickness, finish, mask color, and min track/space.  
-- Optional: panel outline DXF/SVG in `CAD/`.
-
----
-
-## Firmware
-Two paths. Use what you like.
-
-### A) Arduino IDE
+## Firmware / Arduino IDE
+- Follow `Documentation/ToGo-Lab_FireFly_ArduinoIDE_Program_Guide.md`.  
 - Board core: any stable ATtiny45/85 core.  
 - Clock: **internal**. No fuse change required for first tests.  
 - Programmer: USBasp / AVRISPmkII / Arduino-as-ISP.  
-- Open the sketch in `0001_FireFly/Programm/arduino/`.  
-- Set message and WPM in `config.h`. Build and **Upload Using Programmer**.  
-> Timing: internal RC. Unit may run at 1 MHz (CKDIV8) by default—adjust `F_CPU` or disable CKDIV8.
-
-### B) avr-gcc + make
-- Toolchain: `avr-gcc`, `avr-libc`, `avrdude`.  
-- `cd 0001_FireFly/Programm/avr/` then `make all` → `firefly.hex`.  
-- Flash: `make flash` (edit `PROGRAMMER` and `PORT` in the Makefile).  
-- `config.h` holds CPU clock, WPM, brightness.
+- Open the sketch in `0001_FireFly/Program/`.  
 
 ---
 
@@ -81,14 +59,12 @@ Two paths. Use what you like.
 2. Power at 3–5 V. Current < 10 mA idle.  
 3. Program firmware over ISP.  
 4. Verify Morse timing; adjust WPM in `config.h` if needed.  
-5. Optional: measure sleep current.
+5. Optional: measure current.
 
 ---
 
 ## BOM
-- `Documentation/ToGo-Lab_FireFly_BOM.csv` is the source of truth.  
-- Columns: `Designator,Qty,Manufacturer,MPN,Alt1,Description,Notes`.  
-- Keep alternates for LED and MCU. Note lot/date codes in commit messages for production.
+- Follow `Documentation/ToGo-Lab_FireFly_BOM.csv` as source of truth.  
 
 ---
 
@@ -113,5 +89,5 @@ Two paths. Use what you like.
 ---
 
 ## Contributing
-PRs and issues welcome. Keep it simple. Reproducible steps beat long essays.  
-Photos of your build go in `Documentation/gallery/` with a short caption and license notice.
\ No newline at end of file
+PRs and issues welcome. Keep it simple.
+Photos of your build you send me go in `Documentation/gallery/` with a short caption and license notice.
\ No newline at end of file