Bild in Lightbox öffnen (open image in lightbox). LISY 2.19 March 2016 First PCB with integrated Raspberry Zero. I tried to keep the PCB small to save costs. With PCB production in China it is not necessary anymore.
Bild in Lightbox öffnen (open image in lightbox). LISY 3.11 November 2016 Without Soundadapter and a WLAN USB Stick as the PIZero W with integrated Wireless was not existing at that time.
Bild in Lightbox öffnen (open image in lightbox). LISY80 3.20 with PHAT soundadapter on board ( picture shows a 'Justboom' Soundcard)
Bild in Lightbox öffnen (open image in lightbox). HW 3.3 The seperate EEprom vanished as I used the internal EEprom of the PICs.
Bild in Lightbox öffnen (open image in lightbox). HW 3.6 First version with integrated programmer for the three PICs.
Bild in Lightbox öffnen (open image in lightbox). Latest version with two MOSFETS replacing the SMD I2C-repeater and protection resistors for the switch PIC. Also the 'hard to get' 238er decoder chips for the displays are replaced by 595 shift registers.