Simple delay pedal schematic portable#
I love a new class D chip I am using to save battery consumption in a portable product, but it was a real PIA to prototype. Just my $0.02 If I was still in the kit business I would be tempted to pursue this, because some of the new parts are really cool. This might even save TI the cost of offering their super audiophile opamps in expensive through hole packages, if the smaller modern packages could be cost effectively dealt with using adapters. large production runs of these adapters could be grouped together to reduce cost, and even some defacto standards could emerge for similar parts adapters. If TI cultivated an informal distribution of re-sellers to market these "adapted" parts. I know that companies like TI sometime sell demo PCBs but these are too expensive and often unwieldy to prototype with. I bet a strong secondary market could emerge for parts, attractive to DIY or old gear upgrades, if offered in more through-hole compatible packaging. I believe (know) there are many parts like this, that could find a broader market, and perhaps win more design ins if they were easier/cheaper to check out. I appreciate that TI doesn't want to get in the business of selling adapter PCBs, or offering parts in non-competitive packages, but it would be useful for small companies also, to be able to get QFN or BGA packages in something that can be hand prototyped without laying out a special PCB. This brick contains a rather complicated circuit with 3 PT2399 (numeric delay chip) that follow each other with really short delay time to act as a reverb. Put on your TI employee hat for a second. PS FWIW my old 1976 kit used MN3001, and one of my kit flangers was used on a popular recording (Heart's Barracuda). there are lots of guitar pedal schematics published on the WWW It is generally simpler to generate a clock at 2x the needed clock, then divide that by 2 in a flip-flop to make perfect 50% duty cycle. To modulate the clocks to provide texture to a chorus effect, you will need a simple voltage to frequency, or voltage to period convertor. While these are analog in/analog out devices, the audio is time sampled, so you need to consider anti-alias and anti-imaging filters to prevent birdies, and reconstruct the waveforms. I believe Panasonic also sells a dedicated clock driver. They require a two phase clock, to step an analog input voltage one clock cycle at a time from input to output.įor the shorter BBDs I have used simple cmos flip flops as clock drivers, while the longer delay chips have too much capacitance for that. Something like the shorter 3001 will be running into audible clock frequencies at longer end of your desired delay range.īBD analog shift registers are simple in concept. I think the 3005 may be marginally too long to make your shorter delays, but will deliver cleaner, wider response thanks to the high clock frequency. 10-20 mSec is long (IMO) for flanging, and a little short for proper chorus/double track, but my guess is the latter (chorus/ADT) is your application.Ĭheck out the MN300x series.
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