Telescope control system

If a power supply for one of the TCS crates fails, the time to change it can be many hours depending on the conditions. In one crate the supply sits well hidden inside and requires all cables to be disconnected and the crate to be taken out completely. To avoid loss of many hours observing time, a number of standard industry supplies were purchased and a design for just turning some switches to change to the spare supply was made. The main crate that handles most of the input/output now has got a spare supply and a set of switches installed so that the power source can be changed using the switches in a minute.