OK, I'm obsessing on my upcoming theremin project and it'll still be a while before my Jaycar kit arrives from Oz.
I've checked Maxie's mods to this kit (on this site; his webpages are down I gather). First, is there a modified component layout diagram which shows where to add the mods onto the pc board? Or do we just 'wing it'?
Second, I was wondering if some of the mods might be ok to do with panel-mounted pots instead of trimpots. For example, the 'sound' section has the original mod to alter the waveform to a sine/saw mix. Could this trimpot be changed to a panel-mount knob to allow external sound quality adjustment?
Also, there's a mod to give more range to the volume control by replacing a 1k resistor between pins 2&3 of the IC with a 2.2k. Would it be ok to replace this with a 500-ohm resistor (approx.) and a 2k (or so) pot to allow external adjustment of volume sensitivity?
Does the Jaycar kit come with a hookup for an internal speaker as well as an audio-out jack?
I plan to mount my kit in a good-sized wooden box with 'real' loop and rod antennas. I want to make a nice, playable instrument for my gf. Was also thinking of mounting an internal 9V battery & holder, and having a 2-way switch to run off of internal or external power. Will this work?
Any other suggestions beyond these? Thx!!!
I've checked Maxie's mods to this kit (on this site; his webpages are down I gather). First, is there a modified component layout diagram which shows where to add the mods onto the pc board? Or do we just 'wing it'?
Second, I was wondering if some of the mods might be ok to do with panel-mounted pots instead of trimpots. For example, the 'sound' section has the original mod to alter the waveform to a sine/saw mix. Could this trimpot be changed to a panel-mount knob to allow external sound quality adjustment?
Also, there's a mod to give more range to the volume control by replacing a 1k resistor between pins 2&3 of the IC with a 2.2k. Would it be ok to replace this with a 500-ohm resistor (approx.) and a 2k (or so) pot to allow external adjustment of volume sensitivity?
Does the Jaycar kit come with a hookup for an internal speaker as well as an audio-out jack?
I plan to mount my kit in a good-sized wooden box with 'real' loop and rod antennas. I want to make a nice, playable instrument for my gf. Was also thinking of mounting an internal 9V battery & holder, and having a 2-way switch to run off of internal or external power. Will this work?
Any other suggestions beyond these? Thx!!!