Recent content by gattis

er no, TTL binary modulation would need to be 44100Hz * 65535 = 289MHz. So that's probably out of the picture.

I personally don't need 1MHz. I am trying to modulate the laser power with an analog audio signal so it just needs to support analog modulation in the audible range of 20Hz-20KHz. However if analog is not possible (some drivers only support TTL) and we take that off the table, then I would...

thanks for that. yeah it seems as though the flexmod p3 is no longer in existence. i wish whoever was selling it would open source the design if they don't intend to sell more but that might be a lot to ask of someone. there's also this design that would work for high current using an lm338...

flexmod p3 exactly what i need! 4A and 160khz modulation bandwidth. biasing and scaling the audio to 0-5v is not a problem.

thanks! those pointers are very helpful. with a first pass i should at least get an idea of how hard the path forward will be. most of my back-envelope calculations say this is in the realm of possibility, but will definitely have to make some major sacrifice like maybe I only get 10 minutes...

I think the point of a current source is that you have to "push" current across diodes in order for electrons to hop the gap, as opposed to a resistor for example where you just put a voltage across it and it will "pull" the current. Diodes certainly don't mind that current changing as a...

Sorry bout that, didn't want to bore but there's a couple use cases I have in mind... simplest one I want to try is to laser cut audio into the groove of a vinyl record (lets say acryllic record instead so I don't get poisoned by arsenic). I'll have a turntable running at 33 1/3 rpm and the...

Does this exist? I took a look at the blackbuck 8m which has analog modulation but from the plot on dtr's page with a 2khz square wave input, it seems it would not respond at freqs much higher than 2khz. I don't know too much about voltage controlled current sources but I took a (perhaps...