Decided to try my hand at creating a PCB with EasyEDA.
I have a couple of these PWM generator boards. They are available on E-Bay from many sellers in China starting at about $3.50 (Use search terms "PWM Generator" on E-Bay).
This board works well as a PWM source with any of the LDD drivers. Just connect up one of the three PWM outputs to your driver , supply it with +5V and it works as expected.
But I wanted to make it more Plug 'N Play. And I need more than 3 channels for some of my projects. So I created a host PCB that will support two of these modules. Jacks for input power and the PWM outputs are added. Serial Communications to each module are brought out to a Terminal Block for future use (remote connection via either an Arduino w/Network shield or some other method using serial over Ethernet). There are two DC power jacks for use in daisy chaining power from this board to another board/device (such as an Arduino).
The schematic:
and the PCB:
Not a complicated circuit. Since low-cost PCBs are limited to 100mm x 100mm, that became the size. There's room to do more. Connections between the modules and the host are via 3 headers soldered to the bottom of each module and matching sockets on the host board (just like the Arduino/Shields do it).
I have not ordered the initial boards yet.
Comments/Suggestions?
I have a couple of these PWM generator boards. They are available on E-Bay from many sellers in China starting at about $3.50 (Use search terms "PWM Generator" on E-Bay).
This board works well as a PWM source with any of the LDD drivers. Just connect up one of the three PWM outputs to your driver , supply it with +5V and it works as expected.
But I wanted to make it more Plug 'N Play. And I need more than 3 channels for some of my projects. So I created a host PCB that will support two of these modules. Jacks for input power and the PWM outputs are added. Serial Communications to each module are brought out to a Terminal Block for future use (remote connection via either an Arduino w/Network shield or some other method using serial over Ethernet). There are two DC power jacks for use in daisy chaining power from this board to another board/device (such as an Arduino).
The schematic:
and the PCB:
Not a complicated circuit. Since low-cost PCBs are limited to 100mm x 100mm, that became the size. There's room to do more. Connections between the modules and the host are via 3 headers soldered to the bottom of each module and matching sockets on the host board (just like the Arduino/Shields do it).
I have not ordered the initial boards yet.
Comments/Suggestions?