PicoMite: driving a small speaker

Author	Message
matherp Guru Joined: 11/12/2012 Location: United Kingdom Posts: 10180	Posted: 04:52pm 25 Mar 2023         Quote   Nice analog scope…. Thanks. Hameg HM407 Analog with digital storage as well   Quote   are you planning to include the "p" and "n" (white noise) options for the play sound function in the next release of PicoMite MMbasic? Yes   Quote   Did you measure the output into a speaker or a resistor? the 1.4v offset in the output is probably not going to go well with a speaker voice coil, they normally don't like anything more than a few mV, hence the reason for coupling capacitors in single supply amps (unless BTL) Now fixed as per Mixtel's change so no more DC offset and waveform across speaker just as good (1000Hz) Note change of bias resistors - now 12K to GND and 15K to 5V Check out the recording in the post above Edited 2023-03-26 02:53 by matherp