sharkeeper
Enlightened
What kind of noises are you getting from your 4+'s? Is yours singing?!
Mine emits are variety of noises. At full power it hums quite noticeably. Around level 8 the wine is noticeable if the light is held right up to the pinna of your ear. Actually the hum at L1 is only audible in the same sense, but considerably louder.
Bringing the Arc 4+ near an AM radio with a standard ferrite bar antenna is quite a treat. Whereas the L4 and LSH-P just produce a minor hash similar to white noise, the 4+ is rich with switching noise. You can tell there's a micro onboard!
Also, the PWM is quite noticeable (to the naked eye) on L16. Especially when the light is waved around.
I have a nice photovoltaic sensor that I can hook to my board to capture these modulations to PCM (wav) format and can upload some samples for people to listen to if there is an interest. These samples would be from the actual light emission and not from a radio receiver. I have a feeling the later would be more interesting. The PV sensor has excellent attack and decay response times but the LS is relatively slow especially on decay due to the secondary phosphorescent persistence characteristic that all white LED's possess.
Cheers!
Mine emits are variety of noises. At full power it hums quite noticeably. Around level 8 the wine is noticeable if the light is held right up to the pinna of your ear. Actually the hum at L1 is only audible in the same sense, but considerably louder.
Bringing the Arc 4+ near an AM radio with a standard ferrite bar antenna is quite a treat. Whereas the L4 and LSH-P just produce a minor hash similar to white noise, the 4+ is rich with switching noise. You can tell there's a micro onboard!
Also, the PWM is quite noticeable (to the naked eye) on L16. Especially when the light is waved around.
I have a nice photovoltaic sensor that I can hook to my board to capture these modulations to PCM (wav) format and can upload some samples for people to listen to if there is an interest. These samples would be from the actual light emission and not from a radio receiver. I have a feeling the later would be more interesting. The PV sensor has excellent attack and decay response times but the LS is relatively slow especially on decay due to the secondary phosphorescent persistence characteristic that all white LED's possess.
Cheers!