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.
Ah, being colour blind I was wondering whether the problem was my eyesight. Those panels look red to me, too.
Hey, that first sentence was correct when I wrote it
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.
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…
@twinturbo looks like that big bag of yellow knobs is getting some use! Good progress!
I’m sure I have no idea what that’s like.
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?
Today I failed miserably while trying my first smd soldering very frustrating! Wanted to build a pedalpcb spatialist reverb.
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.
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 I probably have too little heat and the wrong tip…
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).
I think it’s probably worth a shot considering I have a couple hundred 3904’s. This is for the Fonitronik clock divider:
Once you figure out a hot air gun, it’s like magic.
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).
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.
Time to get out the multimeter and test those pins!
Yeah, time to get out the multimeter. Looks like a whole lot of reverse polarity. Sorry.