alright, so nobody's perfect. when i drew up my board layouts in the last post, i made a few mistakes which prevented the initially stuffed boards from working. most of these mistakes are super embarrassing because they're pretty obvious. i will attempt to write these out linguistically, and eventually i will get around to actually drawing up a new board layout that implements these changes. refer to the schematic for the part numbers and their place in the topology.
- connect the output of the 741 (pin 6) to the cold lead of c2!
- connect the collector of q1 to ground!
- the values of c3 and c4 got switched!
in the meantime, i've made corrections on the boards with some extra holes and a few jumpers. this is a suitable fix for me right now, since the installation will be going up in less than a month.
this reminded me of my love of accidents. here are some pictures of boards i was etching that became art along the way, by accident:
