Recent content by Siike92

Thanks a lot guys! I'm starting to understand this better. I didn't know about expo converters previously and I couldn't fathom how a 1 volt change would ever equal an octave. That said though, I think I'm ditching the 555 for the LM13700. It will be a lot smaller with more waveforms options...

What if I used a LM13700? Here's the datasheet if you need it http://www.farnell.com/datasheets/87555.pdf. Do you think I'd be able to get 1v/octave out of it without too much hassle? Ultimately, I'd like to use an IC to keep the footprint small. I'm making a mini modular.

Hey guys, I'm working on a voltage controlled oscillator to use in a modular synth system and here's the schematic. http://ecelab.com/circuit-vco-555.jpg I also have a one octave keyboard that I made and each key is 1/12 of a volt. My question is to what frequency I should tune the oscillator...

Thanks for the advice. I figured LTSpice was the standard. I just wanted to be sure I wasn't missing out on anything before I started learning it.

I recently downloaded LTSpice IV to use for testing circuits. Before I start to really learn the software I'd like to know if it's what I should be using or if there's something better. Basically I'm just testing simple circuits, but I do need the software to have a virtual oscilloscope.

How do you analyze things like Resistance, Impedance, Current, and Resistance for a circuit that uses ICs? Are there factors I have to account for in the IC itself?

Thanks a lot for the help!

So then anytime a schematic seems to only have one output lead, the other lead is ground? Is that always the case? What about with input leads, I've seen a few schematics with only one input lead.

Newb Questions -- One lead outputs from schematics? Hey there PF, I just recently got into electrical engineering and created a voltage controlled oscillator and control voltage keyboard to go with it(the goal is a modular synthesizer). I've visited quite a few sites and learned a lot so far...