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[PCB offer] Thomas Henry's Contr.LFO. 2nd run, check PMs
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Author [PCB offer] Thomas Henry's Contr.LFO. 2nd run, check PMs
fonik
LFO with lots of functions:
Thomas Henry TCL555 based LFO Controller (e-m.com)
________________

2nd run:

i am taking orders until 14 JUN 2013.
just contact me via this thread or PM or email, telling me how many PCBs of each (circuit=CB, frontpanel=FP) you would want. be honest about your interest, please.
for the front panel i need a minimum interest of 30pcs.
i won't take any money before i hold the PCBs in my hand. as soon as the PCBs arrived from manufacturer i will contact all who indicated interest concerning payment. paypal preferred.

now to the numbers.
each PCB (circuit or frontpanel) = 10.-USD/7.50 EUR
printed front panel = 13.-USD/10.-EUR
shipping outside europe:
1 PCB = 3.-USD, 2+ PCBs = 6.-USD
shipping europe:
1 PCB = 2.-EUR, 2+ PCBs = 4.-EUR
shipping deutschland:
1 PCB = 1.-EUR, 2+ PCBs = 2.-EUR

since i need a minimum of 30pcs for the front panels be clear about your interest (i.e. what do you need/want if the minimum of 30pcs for the front panel is NOT reached?).
thanks for your understanding
_____________________

what does it do? refer to thomas description in the link above, here is a quote:
Quote:
In triggered mode, as long as keyboard triggers are appearing, the LFO is quiescent. When the triggers eventually stop, the output signal smoothly ramps up to full amplitude but only after a desired interval. This creates the so-called delayed vibrato effect when used to frequency modulate a VCO (voltage controlled oscillator).
In gated mode the LFO is quiescent as long as no keyboard gates are present. But when a gate is finally detected, again the output ramps up.
Footswitch mode is similar, but now it is an ordinary short-to-ground footswitch which enables or disables the LFO.
Finally, with neither a keyboard trigger nor gate present, the unit behaves as a standard freerunning LFO.
All in all, with these basic modes, in addition to a variety of panel knobs, switches and jacks there is hardly a synthesizer control task that can’t be accommodated. Experimentation will probably uncover other valuable uses.


I have the permission from Thomas to do a PCB run for this project. i will offer the actual Controller LFO Circuit PCB, providing MTA-100 headers for easy wiring-up any format.
Additionally i will offer a frontpanel component PCB, which can be mounted piggyback to the circuit PCB. It provides footprints for 9mm vertical mounted potentiometers and vertical mounted sockets (available from earthenvar, however, there are kobiconn fitting the same footprint!?).

i will not provide any building documentations, just refer to the original documentation available from the link above. thomas documentations are very comprehensible, and the PCB lables follow thomas schematics.
_______________

BUILDING NOTES:

the chart below shows how to wire the potentiometers and the jacks, if you don't use the front panel components PCB:


ATTENTION: the PCB omits diode D2. i found the trigger to be fine without it.
however, if you experience occasional double triggers, solder it in parallel to R44.

ATTENTION: the P-JFET 2N5461 comes in different pinouts!
so check the datasheet of the specific brand you use!
(thanks to rosch for this find)
_______________

here are some pictures of the prototype i built:










and a very short demo of the Controller LFO, showing the gated and the trigger/delay functionality.
NOTE: on the frontpanel i mixed up the labels of the mode switch: Trigger should read Gate, and Gate should read Trigger.


https://vimeo.com/52038397

Frontpanel Measures (if you decided to use the additional front panel components PCB), a FPD file is also available:

i tend to use oversized drills to make the marriage of front panel and components PCB more comfortable.

here is a 16HP sketch that would fit the upcoming eurorack panel (if there is enough interest) for the LFO (and the one for the 555-VCO and ADSR is still to be made):



and here is the silkscreen of the circuit PCB:


original post:
BTW I have the permission from Thomas to do a PCB run for this project. It is the same as the VCO: i made a proto PCB months ago, when i had the privilege to a test build for new projects. it is tested and working very well (see pic in link above). however, the PCBs aimed for something else, so i might do some design alignments to allow piggyback mounting with a frontpanel components PCB in eurorack format, which became very popular lately...
[/img]
FingerTappin
Very nice, and cool panel design/color!

Probably interested in a pcb, will you offer a panel also?
Luka
looks good

sad to see all the diy projects aimed at eurorack these days confused
andrewF
Luka wrote:


sad to see all the diy projects aimed at eurorack these days confused


hihi
my boards have to be inserted sideways into eurorack
Luka
back in my day we used to wire panel components you kids get off my lawn
SMS303
4 for me plz thumbs up
keninverse
That PCB layout is awesome Matthias. Totally love the way you route your boards.
diablojoy
Count me in matthias i need more LFO's
at least a couple anyways.
regenbot
I'll take two thumbs up
Blinkar blå
2 plz!
Dego
2 plz
delayed
got pricing one these yet?
fonik
Luka wrote:
looks good

sad to see all the diy projects aimed at eurorack these days confused

it is not!
my PCB layout is meant for wiring all panel components, take a look at my build... you could build this project in any format, in fact thomas designs his circuits for 15V anyways.
fonik
no pricing yet.
the question is of i should/could do a 2nd PCB for panel components, which would require more time and efforts...
nickster
fonik wrote:
no pricing yet.
the question is of i should/could do a 2nd PCB for panel components, which would require more time and efforts...


Yes most definitely Matthias, pretty please. hihi
fonik
a little bit off topic, nevertheless, wiring the front panel components is the better choice IMHO. it is more reliable. you can easily replace failing parts, no stress to the PCB...
PCB mounted components are the choice for commercial products, just because of the price.

my2pence
arrmcbain
I understand the appeal of board-mounted hardware, but in this case I would wire the parts to keep the design similar to the rest of my DIY modules.
Memory_Leak
cant wait two please thumbs up
xerxl
I'd love to try one of these.
That panel doesn't look too crowded, so I don't think its worthwhile doing a component pcb.
Rod Serling Fan Club
Luka wrote:


sad to see all the diy projects aimed at eurorack these days confused


If it will fit in euro it will fit behind anything else.
bensaddiction
Depth might be a tad of an issue for some in euro. A bit squarer would be fantastic.

I'm interested if somebody is going to do a euro panel run (clarke?)
amsonx
one for me please smile
elmegil
As stated elsewhere, definitely one for me :-)

I think I can fit this behind a 1U wide dotcom panel... (not parallel mounted of course) going to give it a shot anyway. My space is constrained, so that would be a big boon for an LFO for my system.
SMS303
elmegil wrote:
I think I can fit this behind a 1U wide dotcom panel... (not parallel mounted of course) going to give it a shot anyway. My space is constrained, so that would be a big boon for an LFO for my system.

same here... 2 in euro and 2 in dotcom format. first i was thinking for cgs58 dual lfo's. but those haven't a gate input. so the TH lfo's would be a perfect solution 8_)

i still don't get/understand why most lfo's are without a gate input?
roglok
just what i've been looking for! one for me please. thumbs up
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