Introduction
In the Meditech container there is a variable number of devices working at least at two different voltages: 5V and 12V. In this prototype version the definitive powering system has been moved to the bottom of the priorities due the restricted deadlines and the need to have an experimental unit before a final decision: battery type, charging type, power consumption etc. Just for this reason the power will be granted by a common ATX switching power supply. This implies a couple of conditions:
- For any future change, we will grant a power distribution for 3,3V, 5V, 12V
- The number of power points is variable and should not be difficult to increase / decrease
- The main power should be simple to be replaced as in future the power source is different than the first prototype
Main power module
The main power module simply act with a NE555 in a similar way as the logic power switch of PCs. This is a small independent circuits that should be replaced by the future battery power control.
The following images shows the circuit schematics and the relative layout.
Power rail distribution
Every powering unitis a short module that will fit in a plastic rail; the circuit can be positioned along the wider side of the bottom of the Meditech box for easy reachability of the powered devices. Every group is connected with the previous and exposes all the power supply voltages and ground.
The following images shows the circuit schematics and the relative layout.
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