SDG #117 $53 360W Riden RD6006 Programmable Bench PSU

The Riden RD6006 is a programmable buck converter front panel rather than a complete bench supply, and understanding that distinction is the key to buying one sensibly. It takes a DC input from a separate AC-DC unit or transformer supply and provides 0 to 60V at up to 6A, roughly 360W of output, controlled through a colour LCD, rotary encoder and keypad. Voltage and current can be set with 10mV and 1mA resolution, presets stored, power and energy totals viewed, and the whole unit driven over serial or USB for PC control and data logging.

The review examines the things that separate a usable laboratory supply from a basic buck module: how closely the readback matches an external meter across the range, how much output ripple and switching noise passes the output stage compared with a linear supply, how quickly the module reacts to load changes, and whether the constant current mode behaves predictably when the output is shorted or an LED load is driven. Because it is a switcher, noise performance is inevitably worse than a good linear bench PSU, which matters for sensitive analogue or RF work but is rarely a problem for general prototyping, battery charging, motor testing or burn-in.

Practical points for buyers include the need to budget for a suitable input supply and enclosure, the importance of keeping input voltage sensibly above the target output for efficiency and thermal reasons, and the fan and heatsink behaviour under sustained high current. For the money, it delivers specification and features that cost far more in a branded instrument, provided the assembly work and switching noise are accepted.