In a recent visit to the makerspace, I was able to assemble a couple of shields targeted at my Singing Pumkins project where an Arduino drives animatronic pumkins in time to music.
The shield with the large heat sink is a 20W car amplifier that will take the output from the wave shield and send it to some speakers. The larger shield is a riff on Laday Ada’s 12 Channel PWM controller. The difference is that this one is in a shield format and includes a DC to DC converter that will bring the 12V of the car battery down to the 6V maximum of the PWM chip.
I only just had enough time to assemble the boards, not test. But, hopefully, I’ll have everything thing working correctly.