Oscillator info from SailorMouth.org
Cappy has notified me of an update to his site SailorMouth.org. This update consists of several pages dealing with various oscillators. There are also tips and tricks on how these circuits can be used in circuit bending or modifying toys. 555 timers, logic gates, and crystals are covered in some detail with diagrams and descriptions.
4 Comments:
At 4/13/2006 07:53:44 AM, wayn3w said…
Thank you Sailormouth -- this is a GREAT resource. I think it's time for YOU to write a book.
One thing that I would appreciate information is using oscillators to modulate existing sounds, rather than injecting signals. I've been looking for a good source of info for that (different wave forms generators, other then square, and things other than vactrols) but it's been spare.
At 4/13/2006 09:41:32 AM, Anonymous said…
The LTC1799 smd image made me cringe.
At 4/14/2006 03:07:34 AM, peterpan said…
I looked over the Sailormouth 555 timer info.
Electrical diagrams are still somewhat of a foreign languge to me. I would love to see a diagram sometime that explains what's what in terms of an "Idiots Guide" to adding a 555 to a toy and what the general possibilites/concepts are. learning the electrical language feels like a large learning curve to me right now but it is begining to make more sense. Does anyone have a good 555 tutorial for bending toys for the non-schematically inclined?
At 4/17/2006 12:39:05 PM, sailormouth said…
wayn3w - the difficulty in modulating the sound is unless there are some analog components generating or affecting the sound there is no "access" to modulate the sound. That just leaves building a filter or envelope to affect the output of the toy.
Injecting the osc to the clock signal is different than injecting into the circuit in other areas. I did not really go into injecting other than clock sig because that is really hit/miss depending on toy, but it is always worth it to try.
Other than square you are going to find triangle, sawtooth, and sine waves. A couple of 1458 osc in series can give you sqr, tri, and sine. I have used the Fading Red Eyes on Bill Bowden's site for a tri wave. It requires some changes for the voltage on the toy. Using that circuit with a photo resistor compared to a sqr from a 555 w/photoresistor is quite nice.
Anon - Yes it is ugly, but functional.
Peterpan - practice on just building circuits (stand alone tone generator, led flashers, or whatever) will help with reading schematics. If you can find an experimenter kit (150 projects in one type kit) for cheap do it. When you get the hang of reading a schem to build it on the breadboard, you'll then learn to transfer from breadboard to pcb. Once you hace a circuit on pcb you'll for the most part only be connecting 3 points to the toy - power+, power-, and output of your circuit to some point on toy. Or buying preprinted pcb kits and assembling them you'll really only have the 3 connections to make.
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