Clarify licences

1 files changed, 10 insertions, 4 deletions

diff --git a/README.md b/README.md
index 6e71480..6e9a6b6 100644
--- a/README.md
+++ b/README.md
@@ -3,10 +3,16 @@ Picardy 2020
 
 A reinterpretation of the [Picardy 2m SSB transceiver](http://f6feo.homebuilder.free.fr/transceiver_PICARDY.html) by F6FEO
 combined with the [Anglian 3L transverter](http://www.g4ddk.com/Products.html).
+Additional inspirations: uBitx, the KN-Q7, LimeRFE and EI9GQ's "Building a Transceiver" book. Many thanks to all the
+designers behind these projects.
+
+The hardware design is licenced under the "CERN Open Hardware Licence Version 2 - Permissive", see *cern_ohl_p_v2.txt*.
+The firmware is MIT-licenced.
 
 * Designed in KiCad
 * Meant to be used with a microwave transverter
   * But also stand-alone 28MHz and 144MHz (The IF bands)
+  * Offer plug-in band-filters for other HF bands
 * Using a STM32F103C8T6 controller
   * Si5351 clock source (generates 3 clocks)
   * An LCD display
@@ -15,10 +21,8 @@ combined with the [Anglian 3L transverter](http://www.g4ddk.com/Products.html).
   * Offer a 10MHz output refclk for a transverter
   * Instead, have a 25MHz ref input, and use a LeoBodnar reference
 
-* Very good [explanations](https://groups.io/g/BITX20/topic/si5351a_facts_and_myths/5430607) about DDS vs DPLL from Hans Summers
-
-TODO before ordering the PCB
-============================
+Open questions
+==============
 
 * CW
   * Does the trick with the DC bias to leak the LO work ?
@@ -70,6 +74,8 @@ PCB Assembly Plan
 Additional remarks
 ==================
 
+* Very good [explanations](https://groups.io/g/BITX20/topic/si5351a_facts_and_myths/5430607) about DDS vs DPLL from Hans Summers
+
 * Si5153 test before PCB fab:
   * It seems the desired frequency plan can be achieved:
     * clk0: LO1 = 28 - 4.9152 + VFO, i.e. from 23 to 25