Thomas Henry Quadrature Function Generator (Eurorack DIY)

Transcription

1 .0.0 Thomas Henry Quadrature Function Generator (Eurorack DIY) Page of Introduction I consider the Quadrature Function Generator (or QFG) to be one of the classic Thomas Henry deisgns. There has been a PCB years ago, but we thought it would be time to re-publish it again. You can find a detailed description of this design at cott tites birthofasynth.com page, where he hosts a lot of information for Thomas Henry designs. Features Triangle core VCO with four outputs at 0, 90, 0 and 0, Indicator s, CV input with attenuator, CV input for V/Octave Coarse and Fine tuning pots, Range switch (sub audio/audio range) pecifications The frontpanel measures: HP (Eurorack) Mounting depth behind frontpanel incl. power plug: 0mm Power consumption: TBA BTW this is not meant as a beginners project. I do not provide step-by-step building instructions. I just assume that you already build quite a few projects and know how to read the BOM and schematics. 0 by Matthias Herrmann Do not copy or distribute by any means For private use only

2 Layout/Design Page of General mounting instructions This project uses two PCBs, one board with the actual circuitry and an additional adapter PCB carrying the front panel components. The adapter PCB is used to mount the PCBs to the front panel. The PCBs are connected using two x0 headers/receptables with,mm pitch (.in). Look out for something like this: Note the PCB is cramped with parts, so there are only two mounting holes on the main PCB. They cannot be used to screw the main PCB to the adapter PCB. I recoomend to use precision IL headers and receptables, which mate rather firmly.

3 Overlay for Reference & Manual Wiring Guide Page of M J: V/OCT---- J: CV (-Att R)---- R: COARE---- R: FINE---- -V---- -V---- W: PEED)---- M M ---- J: OUTPUT D: D: J: OUTPUT J: OUTPUT D: J: OUTPUT D: 0 M

4 BOM Page of Qty Value Parts Resistors 0R or ferrite F, F 00R (trimmer) R 90R R R, R, R, R, R, R, R9, R0 k R k R k R R, R, R, R, R, R9, R0, R, R, R, R k R k R k R k R, R9 k R0, R k R R, R, R, R, R, R (trimmer) R9, R0 0k R M R Capacitors 00pF C, C n C n C n CA (timing cap) DC, DC, DC, DC, DC, DC, DC 00n CA, CA 0n CB (timing cap) 0uF C, C Qty Value Parts emi's N D, D N00 PD, PD N90 Q N90 Q, Q J Q LM00 IC TL0 IC, IC, IC, IC CD00 IC Misc (Adapter PCB) PDT on-on W (miniature) (9mm R, R, R Potentiometer) ocket (PJ-0B) J - J (mm) D, D, D, D x 0pol IL header (female) x 0pol IL header (male)

5 COARE FINE ATTEN LOW FAT 00n 00n 0R or ferrite 0R or ferrite N00 N00 GND LM00 LM00 CD00 k M k 90R 00pF 00R N90 N90 k 0n n k k N k N90 k N k k J 00pF 0k k k n n V/OCT ENVELOPE 0 OUTPUT 0 OUTPUT 0 OUTPUT 90 OUTPUT PDT IC IC IC V/oct IC IC Connect Trim Offset Trim EURO- EURO- EURO- EURO- EURO- EURO- EURO- EURO- EURO-9 EURO-0 CA CA F F PD PD ICA ICB ICA ICB DC DC DC DC ICA ICB 0 9 DC DC ICA ICB 9 0 ICC ICD ICP VDD V DC R R0 R R R R C R Q Q R R CB CA R R R R D R Q R R9 D R R R R R R R R R ICA ICB ICA ICB R0 R9 D G Q R0 R R R R R C R R R9 C C R R R R R9 R0 M- M- M- M- M- M- M- M- M-9 M-0 M- M- M- M- M- M- M- M- M-9 M-0 MTA- M- M- M- M- M- M- M- M- M-9 M-0 M- M- M- M- M- M- M- M- M-9 M-0 J J R R R J J D D J J D D W A A THOMA HENRY QFG Quadrature Function Generator 00 Redrawn schematic by Matthias Herrmann GND +V -V Page of