The Return of the HybridSID Player PCB rev v2.0 by Xad/Nightfall & Gianluca Renzi (RetroBit Lab). Based on the Project and Hardware Schematic by Markus Gritsch released in the years 2011-2015 on the forum dangerousprototypes. Thanks Markus.

After the first revision of the PCB we are realized that there were some design problems and consequently of a correct functioning.

Below is a brief description of the fixes and improvements that have been made for the new one version of the SID Player PCB.

PCB rev v2.0 St.Valentine’s day version:

• OLED did not turn off when the power switch was off.
• Wrong pinout of the ALPS switch and consequently the PCB could not be powered via the USB power supply/power bank.
• Removed Zener diode.
• Added two new jumpers to select (AB – BA) for the rotary encoder.
• Rotary Encoder 20 steps, the previous one was wrong.
• Removed circuit for the switch of the two LEDs to visualize what SID is used for playing the song.
• Remapped the two SID LED switches on two MCU pins (RB15 – LED SOCKET # 1, RB12 – LED SOCKET # 2)
• Removed the possibility of using OLED 0.96″
• Aligned OLED 1.3 “on the line of the ZIF Socket.
• Moved reset signal that was used by OLED 0.96 on free pins connector.
• Fixed the holes for the OLED 1.3 “
• Remapped the following pins (RD5 – SID_RW, RD6 – SID2_CS, RB9 – KEY_FFWD, RB10 – KEY_PAUSE) to free 5v tolerant pins.
• Added two new pull-up resistors for PAUSE and FFWD key.
• Redesigned the entire amplifier stage for the headphone output using TPA6111A2 and NE5532.
• PCB tracks optimization.
• Facilitated the CPU DEBUG by creating a “frame” where each PAD corresponds to a pin of the MCU.