Now and again, the need arises to test low-voltage power sources - predominately PSUs and transformers. My usual approach is simply to measure the voltage and current when various load resistors are connected. Of course, this requires an assortment of power resistors - and sometimes the power rating required of these can be quite considerable. Normally, for me, this is not really a problem, but the need to keep wiring up & then re-wiring these resistors can get rather tiresome.
For quite some time now, I have owned four 3-ohm 300-watt high-power resistors of the well-known aluminium-clad variety: 'Arcol' manufacture. Often, these have been used for the above need. However, during a recent tidy-up, I came upon a steel box, some meters and a few other bits & pieces - and another idea was born. :idea: Wire them together, via switches, to make a semi-variable dummy load.
And the associated pictures give the end result.
Al. / May 27, 2011 //
Update: Following this Forum's earlier re-structure, pictures now reinstated:
[attachment=3492][attachment=3493][attachment=3494][attachment=3495][attachment=3496][attachment=3497]
Al. / Dec. 6, 2011 //
For quite some time now, I have owned four 3-ohm 300-watt high-power resistors of the well-known aluminium-clad variety: 'Arcol' manufacture. Often, these have been used for the above need. However, during a recent tidy-up, I came upon a steel box, some meters and a few other bits & pieces - and another idea was born. :idea: Wire them together, via switches, to make a semi-variable dummy load.
And the associated pictures give the end result.
Al. / May 27, 2011 //
Update: Following this Forum's earlier re-structure, pictures now reinstated:
[attachment=3492][attachment=3493][attachment=3494][attachment=3495][attachment=3496][attachment=3497]
Al. / Dec. 6, 2011 //