Be gentle on the red font and the caps... I promise that I will take proper care for my new instrument! ;-)happyfreddy hat geschrieben:hi
The diodes anyway if 1N4004 ode 1N4007 doesn´t matter, its only for security if changed polarity of DC supply, In conclusion with this fact
the input Voltage must be 8,7Volts DC MINIMUM ( 3 Volts for Regulator 7805 correct operating and 0,7V for 1N4004 or equivalent ).
The output level of the HOAX 3 is LINE OUT signal. If You want to drive a headphone You must first connect a headphone amlifier.
There are two OUTPUT connectors DIRECT or via LESLIE. The leslie channel has a separate volume pot on Plug 9 Pin 11 (Regulator Pin on plug 9 /11 and GND and Vref at the ends same as drawbars). You can measure the Vref direct at the drawbars , it must be +3V3 to GND. Drawbar pots have the value of 2K2 to 10K but use only one value for all, never mixed.
There is no need to change any level via MIDI or so. DON´T TRY ANYTHING WITHOUT KNOWING WHAT YOU´RE DOING !! ( specially RANDOM Changes in try and Error matter , marked in RED in DOC Hoax 3 Syntax !!) The problem You have is a uncorrect connection to Your Amplifier. The output of HOAX is low Impedance so there is any problem with th input impedance of Your Amp. Use a volumepedal as marked and reduce first the Input Level of Your Amp.
happyfreddy
And you are completely right: the exact diode type doesn't matter.
But what might matter for future builders is that they do not place the zener instead of the general purpose rectifier..
That was the real point I was trying to make. It only needs a few extra hints on the top diagram I guess.
It sounds like I have an additional soldering job ahead of me, in order to get the sliders and volume knobs at my disposal ;-)
From your words, it sounds like some adjustments can only be made with potentiometers?
A nice feature here would be if the source for certain controls could be selected. As with the scan cores.
Then you could configure if - for instance the leslie volume setting - would come from a pot -or- a MIDI controller change message.
This would allow for full playback and full control from a MIDI-sequencer. The Xilinx FPGA probably has the values in its registers right now anyway.
So, this 'routing' should be trivial. However, the Atmel MPU might also be involved with the MIDI-processing. That could make things complicated again.
Meanwhile the organ now plays via an amplifier.
Think I will get myself the Yamaha FC-7 expr. pedal soon...
--
Edwin