Bending = Info :: Instruments :: Music :: Sequencers :: Youtube Channel
Art = Statement :: Show List :: Pieces :: Videos
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Bending = Info :: Instruments :: Music :: Sequencers :: Youtube Channel Art = Statement :: Show List :: Pieces :: Videos |
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Toys with a LCD Pitch control So with all that other info here is the point. Pitch on a toy with an animated LCD can only be slowed down and not sped up. The toy has a master clock signal which is going to be high frequency (11Mhz+) and trying to push it further is going to make minimal difference before crashing the toy. That high freq is for the ultrafast refresh rate of the LCD. Another thing is usually I refer to pitch slowing down and speeding up with a given understanding that slow will equal a lower pitch/tone and fast a higher pitch/tone. Well so far with the toys I have been working on slower does not lower the pitch it "spaces out" beeps (from melodies) while retaining the regular pitch/tone, and it stretches the words without lowering the pitch/tone. When increasing the clock frequency there is no discernable change for words (they are not compressed), but beeps do sound like there is a slightly increased tempo (that is compared to the toys regular clock freq). I talked with a co-worker who said the following could be plausible. -- Cheaply made toys/instruments without complex circuitry could have a proportional relationship between clk sig and tone (pitch). A more complex chip could have tone (pitch) controlled by code instead of clk sig. On such a chip having an adjustable clk sig would affect tempo and not tone (pitch).-- I am not saying do not bend toys with animated LCDs, but expect to get different results than you might expect. Slowing the clock is pretty cool because you can "stall" or hold parts of words, but a downside is button press to response time is affected past a certain slower speed. Here is the Vtech Talking Whiz Kid I did before really testing and trying to push it further. As I mentioned in the info on oscs. -- -- If possible plan where your components will be mounted so that while breadboarding you can use the same length of wire. Sometimes wire length and what it routes near/next to/on top of will have an affect. Use fresh batteries when breadboarding. -- -- Both of those bite me in the ass when working on the Talking Whiz Kid. I was getting different results while breadboarding because of old batteries, and then the circuit when routed and added acted differently causing me to make edits/substitutions when installed. YMMV. Overview Animated LCD Pitch control |
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