So I have this multi-tap transformer as a project. I bought the transformer, the only thing I did is the connections and the casing. When I tried to connect a 12v DC motor, the motor will vibrate like it is spinning but the rod/tip of the motor is not. Sometimes it spins clockwise or counter clockwise. What is the problem? Help please.
Electronic – Question about Multi-Tap Transformer
transformer
Related Solutions
Yes, you can use a switch to select different taps, and as long as your rectifier/filter circuit is designed for the voltage while on the highest tap and the maximum current while on the lowest tap, you only need one rectifier/filter circuit after the tap selector switch.
Your best selection for a switch to use is a "Break-Before-Make" switch.
That is not a schematic.
Yes, you can use it, with a full-wave bridge rectifier. Instead of grounding the (nonexistent) center tap of the transformer you ground the minus side of the bridge rectifier.
Similarly one side of the filament should be grounded rather than the (nonexistent) filament winding centre tap.
simulate this circuit – Schematic created using CircuitLab
Be extremely careful and don't electrocute yourself.
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Best Answer
A transformer, by the very definition of what a transformer is, is an AC/AC converter.
So, you can't attach a DC motor directly to a transformer. You need some kind of rectifier after the transformer, or you need an AC motor.