2023-02-17 - getting some of it off the breadboard





for the first rounds of testing ideas and confirming that the expected results come out, i have mostly been doing everything on breadboards. that's fine for initial proof of concept but the bulky breadboard fast becomes annoying to deal with when connecting prototype circuits to other things. i'm not quite ready to start building the actual thing yet, so the next step is moving stuff to a prototyping board

here's the first step. it's a mess. sorry.



o1/o2 are for the oscillator inputs, and the passthrough outputs are the unlabeled ones opposite. g1 and g2 are connected to the labrador's signal generators



and in this configuration, it's easy to pass the generated signals into the oscilloscope ports and verify the output. here's two sine waves where one is twice the frequency of the other, offset to better see both waves

i did a stupid thing that delayed my progress for rpi gpio-driven variable voltages. i looked some options over on amazon for pwm -> voltage converters. and then the next day i ordered what i thought was what i looked at. nope, it was the very similar looking opposite version that converts voltage to pwm. that is not useful to me for now, but they were cheap, so they'll go in the parts collection for an unknown future purpose

i've ordered the correct things, and they arrived today, so i'll probably poke at that over the weekend. if progress moves quickly that might be another blog post. who knows. lol not like anyone reads this tripe. i am looking forward to the functionality...being able to do fine grained control of the levels from python or c is going to bring synthesizer control much closer to worlds i am familiar with. and having this prototype's functionality already in place will be great for validating i'm sending what i meant to send

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