DC blocking capacitor

We’ve had a few questions about the in-line capacitor on our audio player board. This is the capacitor between the PIC pwm output pin and the gate pin on the transistor amplifier. At first glance, it seems a bit counter-intuitive: we’re...

Different speakers sound different

It’s almost so obvious as be incredible!Here’s our PIC-based wav audio player with a cheap 15p speaker from Farnell. The difference between this and the speaker on the alarm clock is amazing! We’ve tried all kinds of different ways of amplifying...

A short interruption for a demo

Here’s a quick movie showing our final audio player actually being used in a final product.The PIC has been programmed to read a value from eeprom, increase it by one, rollover back to zero once a certain value is reached, and use this value to decide which...
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