WARNING: Smart PWM boards are not recommended for beginner electronics hobbyists. There are no on board safety features, so they have to be added off the board. Use at your own risk.
**If ordering from The US please use Voltrove Electronics**
Designed by Mark Mathis, the Smart PWM V2.2 is the successor to the V2.1 board with some updates and improvements.
The Smart PWM boards are low frequency variable voltage regulators. They switch an N channel MOSFET, use an analog potentiometer to adjust the duty cycle up/down, utilize and LED indicator and a momentary on switch to fire as well as for other functions. They do not use a display. You can add a voltmeter if you like and while it’ll work similarly to other low frequency PWM setups(555 timers, etc.), but it won’t read an accurately.
The Smart PWM boards switch a MOSFET in a similar way as the 555 timers, but they have many extra features like lock/unlock, a 10 second run timeout, low battery warning, low voltage cutoff, reverse polarity and a “regulated” mode to provide a consistent voltage throughout the whole life of the batteries, and even after you swap batteries.
Mark the designer of the Smart PWM boards takes customer support very seriously and has set up a friendly facebook group to offer support and guidance and provide further resources such as instructional videos, the most up to date wiring schematics and troubleshooting. The Smart PWM facebook group can be found here