1.5A multi voltage power station. Selectable output 3, 4.5, 6, 7.5, 9 and 12 volt output. Short circuit protection. Automatic thermal cut off. Automatic overload cut off. Rugged double insulated c ...
I bought 20 of these power packs which are fine for circuits.
Problem is using them for specific heat capacity practical as they don't warm up the heater very well. The current is not stable and the ammeter cycles between 0 and 5, they are also not working well for making electromagnets.
Has anyone successfully managed to stabilise the current so these power packs can be used for all the GCSE pracs? By adding on a resistor / capacitor or something else?
Because at the moment it is looking like an expensive mistake.