My build progress

I find this ingenious, I may have said this before. Although I’d like the yellow to be a bit less on the red side. :wink:

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Ah, being colour blind I was wondering whether the problem was my eyesight. Those panels look red to me, too.

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Hey, that first sentence was correct when I wrote it :smiley:

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So everything is getting close, I need to build another frame as I am going to run out of space.

No module is 100% yet…

And I know the jack banana sockets are out of line on the PSU. Case of measure twice and drill once and still not right.

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I still have “audiooutputs” scratch module, My clock module and the Arduino Baby8 … at the very least to fit in…

I am also drawing up plans for my “Cheap Step Po” which is goung to take a few Units up…

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@twinturbo looks like that big bag of yellow knobs is getting some use! Good progress!

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I’m sure I have no idea what that’s like. :grimacing:

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Working on a clock divider circuit that calls for BC850 NPN general purpose transistors. This seems to be an SMD part…can I swap those for another general purpose…like a 2n3904 for example?

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Today I failed miserably while trying my first smd soldering :frowning: very frustrating! Wanted to build a pedalpcb spatialist reverb.

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Don’t know what your issues were but in my limited experience a couple of tools have been important — first, a magnifier (I use a head mounted one with built in LEDs to light up the work; in fact I tend to use it for THT work as well); second, a good pair of tweezers — my first efforts with an old, not very sharp, not very well aligned pair of tweezers didn’t go that well and in fact I found a toothpick more useful for positioning and holding parts than the tweezers were. Once I got some better tweezers I found it a good deal easier.

My drag soldering technique still needs work though.

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It’s only a single SO28 Chip, so tweezers are not an issue, but I can not get the heat to the pins… I need to make a big blob of tin (?) on my iron to get an effect and then I solder three pins together :wink: I probably have too little heat and the wrong tip…

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Probably – iirc BC850 is a SOT-23 version of BC550, which is a low noise member of the BC546 family. Odds are e.g. 2N3904 will work just fine, but it depends a bit on where/how it is used (i.e. if they picked the 850 for a specific reason, or if they just needed a small signal transistor and that was what they had lying around).

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I think it’s probably worth a shot considering I have a couple hundred 3904’s. This is for the Fonitronik clock divider:

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Once you figure out a hot air gun, it’s like magic.

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Yeah, that should work just fine, unless I’m missing something. The output transistor is used as a switch, with the output current limited by the 1k resistor. The output will swing between 0 V and ~10 V (assuming high impedance inputs).

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Well my power supply finally showed up. Wired it up and smoked both LFOs…One at the 072 and the other at 074, any thoughts? Lights came on for a second then smoke. Here is a picture of the power supply I followed the wiring diagram but would like to verify. Guess I will go back and start checking solder joints 1st, after that I am going to have to use a life line or dial a friend to sort the rest.

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Time to get out the multimeter and test those pins!

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And now I smoked the ADSR

Yeah, time to get out the multimeter. Looks like a whole lot of reverse polarity. Sorry.

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