I'm an electronics hobbyist combining LEDs with 3D printing to make bar signs. I'm on my third sign and am attempting to get away from the Metronome-sounding tick-tock of mechanical relays, so I purchased this 4-channel MOSFET board to drive LED strips (links to all the products I'm using will be below). Additionally, since the LED strips need to be very bright, I'm using 24vdc light strips.
I've also included a simplified schematic (only relevant, connected terminals of devices are shown) of how I have an Arduino Uno board outputting to this MOSFET driver board. My problem with the present setup is that I only ever get about 15V power output from the MOSFET board. The Arduino outputs 5V to the input of the mosfet board.
Regrettably, the MOSFET board documentation SUCKS, so I am not 100% on whether I need a higher voltage input to get a higher voltage output, or what I need to do.
Edit, it's difficult to be sure without tracing the PCB connections to get a schematic, or finding one. The MOSFET outputs appear to be common drain, but the out1+, out2+ etc, are common to DC+ so it may be a high side driver, load goes to ground.
It is not a good idea to buy poorly documented devices, but from the minimal description on the Amazon web page, you appear to have wired the module incorrectly.
My interpretation of the following is that DC+ goes to 24V, OUT1 +/- across device.
DC+: The positive pole of the device's DC power supply
DC-: The negative pole of the device's DC power supply
PWM: signal input terminal (connected to MCU IO port, PLC interface, DC power supply, etc.)
GND: signal negative terminal
OUT+: Positive output terminal (connect to the positive terminal of the device)
OUT-: The negative pole of the output terminal (connect to the negative pole of the device)
Jim-P, thanks for your input and help. I wired as you mentioned and it worked perfectly. I made the assumption I could just land anode to ground. guess I can't. Anyway, the LEDs lit up brightly just as expected.
I'd love to buy a better-documented device. If you have a recommendation on a device that can drive 24vdc LEDs with solid-state circuitry, I'm all ears. I used what I indicated out of necessity.
I actually have two buck converters, one that converts to 5V, one that converts to 12V. when I use a 12V i wire to Vin; when I use the 5V, I wire to 5V. the arduino has always been pretty straightforward, it's this MOSFET board that's been challenging.
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