Mobenthey / Ciat-Lonbarde (synthmall) thread

[corpusjonsey]

Some info here. I remember getting some from Seeed Studio back in the day. Looks like they’re sold out at the moment.

[fellow_o]

Thank for your replay. And for you two @ crucFX
How much ampere? 9V 3W 300mA should be ok for those circuits?

I was also wandering if the schematics I’m seeing in that site are the only one I can find online or there is also other sources of schematic for that circuit? how do you know which value of resistors and capacitor to choose?

[corpusjonsey]

3W/9V = 0.333A = ~300mA (Watt’s Law baby!)

@fellow_o

how do you know which value of resistors and capacitor to choose?

Did you look at the .pdf I linked? (toward the bottom)

[fellow_o]

@corpusjonsey

3W/9V = 0.333A = ~300mA (Watt’s Law baby!)

True!

@corpusjonsey

Did you look at the .pdf I linked? (toward the bottom)

I did, I saw he listed a resistors and capacitors values. Assuming I have no pcb and I want to breadboard that circuit:

How can I know which value of resistor and capacitor I should choose?

[crucFX]

Best best is to cross reference the Schem and the Paper Circuit

[fellow_o]

Ok. I will try that!
edit:
May I ask what is that dashed and dotted line I marked in red and blue?

[crucFX]

its nothing other that showing where the triggering pulse train and slow ramps are generated.
Theyre traces - he likely did em that way so you could also see that they are overlapping but not connected.
It is this section here

[fellow_o]

Thanks for clarify!
where can I found that full PCB layout ?
edit: the beauty of googling… I have found it.
edit 2: is there a substitute for the 2073 IC? I can’t find it on Tayda

[crucFX]

2073 IC’s are Obsolete - you will need to source them on Ebay or elsewhere.

[fellow_o]

lm386 will not work ?

[crucFX]

no. they are entirely different.
Refer to the datasheets

NJM2073D

NJM386/LM386

[fellow_o]

I could just the output of the circuit right before it entered the 2073 amp circuit and connect it to a mixer/sound-card instead?
What I mean by that the solar sounder will still output signal without the 2073 part of the circuit ?

[crucFX]

yeah. you could omit the following and probably just connect a jack to the output cap.

[fellow_o]

Some output resistor befor the jack tip is needed? such as 1k?

[crucFX]

hmm actually it looks like each section is already running through a 470k and then into the output cap -
Should be fine.

[fellow_o]

What type of diodes is in that schematic? 1N4148?

[crucFX]

I’d use 1N914’s - but 1N4148’s would work fine too.

[trytyke]

first day with the plumbutter… still trying to understand it.

[Knivtid]

I just received my Sidrax Organ from Patch Point. I love it, but I’m a bit concerned about the audio out jack on the back. It doesn’t feel fixed to the pcb, feels kind of loose and I’m afraid that it might come off when I’m plugging in or out a cable.

Is this a thing with other Sidraxes or is it just mine?

[T.Jervell]

Doesn’t sound right. I never had a loose audio-out on my Sidrax, or any other of my C-L gear. Sad to hear about your experince. Maybe they forgot to solder it, or Maybe it is partly soldered on?
Edit: don’t own a Sidrax but a Sidrazzi, but I’m pretty confident that the jacks should not be loose. I’ve got a Tetrax, Stuber and a Coco. No loose jack on those