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Peterphuket
Peterphuket 2 minutes ago
Ja Pascal, zo gaat het, vanwege een aanbieding, inmiddels bijna 1 jaar geleden, een abonnement op de engelstalige Elektor genomen, en dan wordt het wel eens verwarrend waar het bericht van Elektor komt. Werkt de versterker bij jou al?
Q-Watt - Simple Audio Power Amplifier (110656)
Alexander gam19 Grigorev
Alexander gam19 Grigorev 17 minutes ago
How and where to specify the address of the NTP-server? https://www.ntp-servers.net/servers.html
DCF77 emulator with ESP8266
BreedJ
BreedJ 16 hours ago
Hi Mans, I will send you an email when I have all the components. Most of them are from China. So it will take a few weeks. regards, Joost  
RF Power Meter with 1MHz-10GHz bandwidth and 55dB dynamic range
BreedJ
BreedJ 19 hours ago
Please send me an e-mail to joost.breed.quicknet@gmail.com. I will contact you.
RF Power Meter with 1MHz-10GHz bandwidth and 55dB dynamic range
JohnHind
JohnHind 1 day ago
Reading the article in the magazine I was baffled by one aspect of this design. Why have four MOSFETS driven by the same PWM signal? As you point out, in PWM mode one device could easily cope with the full 1A available from the PSU and drive all four LED lamps in parallel. The only reason I could speculate was for resilliance: if a MOSFET fails you do not lose all the lighting. But this seems no more likely than a PSU or even a microcontroller failure. You could either use a larger microcontroller with a PWM for each of the four MOSFETS giving separate brightness control, or four separate 1 channel devices each with its own microcontroller mounted close by the lamps to reduce the RF issues aluded to in the article. But with the current design, unless I am missing something, you could save BoM costs by just fitting one MOSFET and connecting all four lamps in parallel to that.
Dimmbare Aussenbeleuchtung / Dimmable Outdoor Lighting [140574]