I should mentioned recommended power supplies since I don't think it's come up much in this thread. After a fair bit of testing, I have come up with the following recommendations.
If you're going to use the split power supply (separate supplies for logic and servos), consider this for the logic power bus:
Power consumption for wired only (no Ex/Rx): 30mA
Power consumption for wireless (with Ex/Rx): 120mA
So I would recommend a 6VDC supply with at least 200mA output for the logic side. That should give some headroom and prevent running something at max capacity. I can't imagine you would save much if you planned on wired only and bought a tiny supply. You'd end up under-powered down the road if you want to add an Ex/Rx later.
The same unit RJ specifies for the Tx would be a cost-effective choice: You are not allowed to view links.
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LoginFor the servo power bus (also applies to single power input configuration), it depends on what your plans are for servo size and load. In my testing I've found that borderline power supply was really affected by the starts and stops of servo movement, which causes glitching in all the servos. I'm using a bench-top 3A power supply and I'm able to dial down the current to simulate less capable power supplies. I would stick with 6VDC and a minimum of 2A. If you're going to run high-power digitals and/or large scale servos, then you'll want to bump up the output current. Unfortunately, servo manufacturers do not specify current consumption with various load conditions. Some will show stall current, but that's rare. In my tests, I had 8 servos in constant motion and was pulling around 1.5 amps, but the servos weren't connected to anything to load them down. I stalled one of the digitals and the current draw spiked to 3A or more before the fuse opened. So shoot higher if it's within your budget. I did a quick search and here's a possibility at 3A output giving some headroom to grow into: You are not allowed to view links.
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