Here is the schematic of the circuit that I added to the Insect-a-tron second hand synth.
You can see a bigger picture if you check out the flickr page here.
NOTE: The 50k pot is a dual (stereo?) and I added two leads coming off the second half. One goes to +v and the other goes to somewhere around the 10k resistor all the way on the left hand side of the left lm386 LFO. There is a switch that will deactivate this second connection. That is what the lower switch on the left of the keyboard controls.
I guess you could say I kinda did a bend on my own circuit.
Here is another… better… video I made of the Insect-A-Tron.
I didn’t realize it but at around 1 minute it almost sounds like the X-Files theme song!!!
Happy Bending!
Second Hand Synth 
Yeah it does sound like X-Files.
Yeah, I really have to re-record one and do the entire x-files song.
That would be AWESOME!!!
Do eeet! Also, thank you for making this blog.
Thanks for checking it out. I wish I had more time to update it.
Cheers!
Awsome blog!
How did you connect the LM386 to the keyboard?
Thanks!
First I made an oscillator using the lm386. Its not a sine wave but its kinda like one. Then I experimented with different combinations of the oscillator output to a resistor to the keyboards timing resistor.
I did it all on a bread board and there was very little electronics expertise and a lot of “let’s see what happens when I connect a wire to this”.
Once I got it sounding the way I liked… I wrote it all down and soldered it all up.
There are 2 oscillators in the circuit. The other one was the same process. I think it effected the other oscilator.
Let me know if you have any more questions.
…and thanks for checking out the blog.
Cheers!
Thanks for the quick response!
‘m currently experimenting and think I’m on the right track now.
Just one quistion; what does the symbol with the text znz907 means?
It’s on LFO 1.
Thanks again!