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Is the rest of the conversion code interesting to you? I didn't post it since it isn't relevant to my question. The conversion is for a 16 bit sign-extended two's complement word from a DS18B20 temp sensor. I convert to a float. Let me know if you want that particular code snippet.
Fred
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I have a routine that converts from two's complement to a float. The first thing I want to do is combine the most significant byte and least significant byte of the output of a sensor to one unsigned int. I may not...
Re: Comparison of free compilers for PIC 18F (PICC-18 and C1
Hmm, well that wasn't really what I was looking for but I'm sure it's going to be useful for some.
I know this topic has been debated many times before but when people are asked which compiler they prefer, they usually answer without any motivation. I'm a hobbyist and will not spend money on a compiler. Thus I'm only interested in hearing comparisons of the FREE versions of compilers for PICs...
Thank you! That worked very nicely! Motorboating gone, only white noise left. Before trying the RC decoupling, I connected the mic directly to the ISD4002 and the motorboating also disappeared. But the signal was too weak and it was almost drowned in the (white) noise. So maybe it is the...
Thanks for your reply.
Yes, following your advice would help. But I'm just curious if it is possible to get decent audio quality on a experimental breadboard. I'm not hoping for perfect here, just something where the sound isn't completely drowned by the low-freq humming.
Anybody succeded...
I'm doing a project with a ISD4002 audio recorder. An electret mic is preamplified and the signal is fed to the ISD4002. The signal out from the ISD4002 is fed to a LM386 amplifier and 8 ohm speaker.
The schematics are here:
Evereything works but I get a lot of low frequency noise, or...
Thank you both. However, I don't understand Audioguru's reply. To me it seems the resistor discharges the capacitor since it connects to ground. Could you elaborate?
Fredrik
I'm building a multi-message record/play unit based on a PIC, an ISD4002 record/playback device, an audio amplifier for the speaker, and a microphone. It's going to look something like the application example in the attached file (which is taken from the ISD4002 data sheet).
I've looked at the...
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