I have been working on a buck converter shield that is compatible with the Arduino Uno and I thought it would be nice to share my experiences.
I have been wanting to buy something like this for some time but haven't been able to find anything on the market. My end goal is to be able to make a solar maximum power point tracker and also a power supply with an LCD display where the voltage and current can be infinitely variable. There should be heaps of uses for this shield from driving high power led's to motors and battery chargers. My programming skills are a bit limited and rusty but i have tested some basic PWM driving of the shield and it is working well. I'm going to need to brush up on my programming to make anything usable.
The specs are:
ACS712 20 amp current sensor for input current monitoring
ACS712 20 amp current sensor for output current monitoring
Voltage divider for input voltage sensing
Voltage divider for output voltage sensing
Synchronous mosfet driver with diode emulation mode. This can be switched on and off to increase efficiency at low load.
35 volt maximum in
10 amps is the maximum load i have tested so far. The unit is staying cool to the touch at this current with no heatsinking.
Im going to do some more testing and will post my results.
Let me know your comments