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DVPWM

297 bytes added, 07:12, 31 October 2014
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DVPWM is a PWM driver originally designed for very simple LED lighting[[File:Dvpwm photo top. It is built to smalljpg|200px|thumb|right|Top view, robust and convenientyes it's small]][[File:Dvpwm photo bottom.jpg|200px|thumb|right|Bottom view]]
It has one single control: DVPWM is a rotating knob with onPWM driver/off switch attacheddimmer originally designed for very simple LED lighting. In "off" position, circuitry It is completely offlinebuilt to be small, robust and convenient.
It has one single control: a rotating knob with on/off switch attached. In "off" position, the circuitry is completely offline. * '''Input''': 6-15 VDC. Inversion protectedWith input voltage polarity inversion protection, suitable for dirty or noisy power supplies.* '''Output''': "high" frequency [? kHz] PWM with duty cycle ranging from almost zero to almost 100%* '''Maximum admissible current''': 5A with SMD fuse on-board. This makes it probably overkill for small lighting, but will allow you to power about 25m of standard LED stripe or even small electric motorsbecause there is a beefy free wheel diode protection.* In most cases, more than one DVPWM can be combined for RGB lighting ('''common groundVCC''')
== Schematic ==
Thanks to Joël H for the schematic. He made it with Kicad and his little brain (jhu[I may have a relationship with Homer Simpson, who is actually my idol -[[User: 4 littles too well educated lonely neurons)Jhu]]]
[[Media:DVPWM Schematic.pdf|Schematic (PDF)]]
[[File:DVPWM render bottom.png|200px|thumb|right|PCB bottom view]]
PCB design was achieved with [http://eda.eremex.com/products/topor/ Topor], a piece of software which truly amazes me. Through recursive contemplation of the routing algorithm, I was able to shorten the track lengths to an almost minimum and reduce the number of vias to an absolute minimum [zero!!!]. The output from Topor was then imported into Kicad again, because we couldn't be bothered to learn new things so early after sunrise.
PCB size is 26x37mm. Height from frontplate (if applicable: circuit secured to frontplate using the knob's nut): 22mm
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