Headers are good on the ADSR but fried the 10R resistors.
Question one is, with power off, do you have shorts on the bus bar between Ā±12V or between either and ground?
Then question two is, with power on (and no modules plugged into the bus bar!), do you have Ā±12V and ground on the correct connector pins on the bus bar?
Maybe youāve checked those already ā I certainly wouldnāt power the bus bar without checking for shorts first, and wouldnāt plug in a module without checking voltages.
^ this. very much this ^^^^
Yeah got overly excited, should have triple checked everything before I plugged things in.
Iām diving into the SMD world next week. Not a good sign to hear that youāve failed miserably knowing that you have more experience with soldering than I do. Iām crossing my fingers that I do not fail. That being said I have heard that good tweezers are essential and some sort of magnifier whether itās a loupe or headset like @analogoutput mentioned. Every video Iāve watched on it people have said the key to success is āflux, flux, flux.ā
how many times have you posted this video now on this forum?
Is the PSU itself even giving out the right voltages? the markings donāt say what itās supposed to put out.
Rob
I donāt want to discourage anyone! I think it was basically that I thought āhow hard can it be?ā and underestimated the challenge I used my 15ā¬ 20 year old soldering iron (probably 15 Mark back then) and no flux at allā¦ a Setup I can not recommend.
I am considering buying a new iron, but for this chip I asked a friend and he will do it for me, because I donāt want to ruin a 15ā¬ chip with my practice, even with better equipment
Not enough? ā¦
This is what I did for my first SMD:
Then I built one of these, low part count, one small IC. Still, I needed outside help to find and fix up my mistakes.
Then I built three of these. My first PCB layout, but also good for SMD practice.
First one with the top tweezers (sucked), second two with the bottom (way better).
Last and most recently I built this:
Also low part count, two small ICs. Didnāt work at first but I found and fixed my soldering problem. So Iām getting there.
Itās the RT65B bought it as a kit with 2 bus boards. I have zero experience with electronics other than simple builds, non modular. Problem has to be with the power and Iām sure itās something simple and Iām looking right at it. Not very confident in my trouble shooting, should have just bought a finished power supply from TipTop or something instead of a kit. Changed out the parts I smoked last night and was, after a few more beers, pissed. Soooo checked the headers, flowed solder, and decided at some point to hook up the other adsr and smoke at the same 10R resistors. This confirmed 3 thingsā¦1. I am a dumb ass for doing that but was confident in my build. Not being shy about fixing things since that is my profession, my drunken logic was if it smokes at the same place on a different adsr then it has to be the power right?..2. I have confirmed the definition of insanityā¦3. I have no clue how to truly troubleshoot electrics. That said I donāt quit, please see confirmation #2. I will sort this, I do not have the electrical pralis but I never give up, there is that pinhole of light.
The RT 65B should be fine (and iiuc fairly robust against shorts etc, even if I havenāt tested that in practice ), and the wiring in your photo looks nice and clean, so I donāt think the problem is on that side.
Your next step now is to unplug your module, optionally remove the ICs, and use your multimeter to make sure you have connectivity from the two 12 V rails to where you should have 12 V power, and no connectivity between the 12 V rails and ground (if you keep destroying the 10 ohm resistors, odds are the latter is your problem) (if you donāt have a multimeter, you need to fix that first).
Feel free to open a new topic and post some pictures of your boards if you want people help you look for potential problems.
Itās entirely possible you will find SMDās easier depending on how you do it! failure isnt a problem anyway just remember that.
Thank you fredrik I really appreciate the help from all of you guys.
Actually I completed this Barton FM Drum several days ago, but didnāt get around to checking it out until just now.
It makes noises and all the controls do somethingā¦ whether theyāre the intended noises and somethings, who knows? Behavior seems kind of unexpected in some ways, but maybe thatās not a bad thing. Most of the unexpectedness occurs at high pot settings, which maybe is expected unexpectedness.
For sure the trigger input isā¦ idiosyncratic. The instructions say
A trigger or gate signal should be input here. The .01uf capacitor and
100K resistor to ground form a pulse shortener, making the pulse length of the input signal
irrelevant.
but a gate from my KeyStep causes it to trigger twice, once at the start of the gate and once at the stop. But if I run that same gate through a buffered multiple it behaves okay.
Incidentally that uses the 84th HP of my 84HP case.
next project a new case ?
One of the next. But needs a trip to buy wood and Iām not enthusiastic about doing that right now.
Mail order parts are another story.
Hi! Iām new to discourse and this group. Is this a general thread for build progress? It looks like you all are making amazing stuff. Iāve been cooped up and put together some basic synth components from junk I have laying around and can share it if this is the right thread. Do you post sound files too? I would love to hear some of these pieces.
Yeah this has turned into the āpost your stuffā thread. Feel free to make a new one for any projects too though. Itās pretty loosey goosey here.