I just finished a small adapter to control a Jebao DP4-S slave doser with reef-pi. It's a super simple circuit based on a ULN2803 to accept 3.3v pwm to control 12v DC motors. Schematic and layout are available on github.
This time I experimented with milling the pcb using a cheap 3018 CNC engraver. I used Kicad, FlatCam, and OpenCNCPilot. It look a couple of attempts to get everything right, but I finally ended up with something useable at the end.
This time I experimented with milling the pcb using a cheap 3018 CNC engraver. I used Kicad, FlatCam, and OpenCNCPilot. It look a couple of attempts to get everything right, but I finally ended up with something useable at the end.
![2cTqmiV.png](/proxy.php?image=https%3A%2F%2Fi.imgur.com%2F2cTqmiV.png&hash=df4b29d581cbfb88cce9a2cd8a2ea010)
![wD59lDe.png](/proxy.php?image=https%3A%2F%2Fi.imgur.com%2FwD59lDe.png&hash=565831840ee66d2074a4fbb57d0a27af)
![a3Gh4rP.jpg](/proxy.php?image=https%3A%2F%2Fi.imgur.com%2Fa3Gh4rP.jpg&hash=1ccb6be79235f958b95ac226c3a4eb45)
![Q7df4E3.jpg](/proxy.php?image=https%3A%2F%2Fi.imgur.com%2FQ7df4E3.jpg&hash=9b1de072a74efc299f419fffebfbe609)
![gLBdXJ1.jpg](/proxy.php?image=https%3A%2F%2Fi.imgur.com%2FgLBdXJ1.jpg&hash=7b67f1372b6ab2bb306f81694e8ee609)