1. R

    DIY Transformer winding short troubleshooting

    Hi there, I’ve been really enjoying the DIY projects section of this site. Today I set out to build an AC transformer using the tutorial. Sawed a few pieces of steel, drilled bolt holes, wound one layer of electrical tape to each bar, and wound several hundred turns of 28 AWG magnet wire to the...
  2. Shamoooot

    3-phase transformer intermittently shorts (or saturates) and intermittently hums loudly and intermittently stops giving output voltage

    Hello I have this problem as mentioned in the subject, which happens when I connect the transformer to a " 3-phase full wave controlled bridge rectifier ". I have a fully controlled bridge rectifier board of (TYN812RG) thyristors, and I want to trigger it through some firing board which I am...
  3. O

    Need some help with Transformer/Contactor

    Hey I'm a NOOB trying to complete a DIY project of hooking up a thermostat to my garage heater. I am following this video... I ordered the exact contactor and transformer linked in the comments. I can't get the contactor to close. The highest voltage I have seen from the transformer is...
  4. M

    HF toroidal transformer - choosing Bpk vs primay turns

    Hello, This is my first time designing a transformer based power supply. I have wound a couple of experimental toroids so far with varying results and am still not sure exactly on how to calculate the number of primary turns. Using a T94-2 core as an example (because I have one sitting...
  5. R

    Flyback transformer's driver's mosfet wires heating up

    Hello everyone, I'm trying to create a high voltage power supply with a flyback transformer, IRFZ44N and a 220 Ohm resistor. (200 ohm in the diagram should be 220 Ohm ) Here's my schematic. My problem is that the wires connected to drain and source of the mosfet becomes burning hot and melt the...
  6. D

    Burned step down transformer 220v to 110v

    Hello, I have bought a Wii console with a non working power adapter. After checking out the adapter I found that the issue was that it has a 120v input and probably was plugged in a 220v. To fix it, I replaced a Varistor, a Fuse and a 200v 180uf Capacitor. The power adapter is rated at 120v and...
  7. RIKRIK

    Question about transformer.

    Hi . I recently acquired a 250vac 240v to 24v transformer. Which i am going to use for a project. Just want to confirm my numbers are right. 3 things. 1)That @24v the maxium i can draw is 10a. 2) 24×10= 240watts. Would a 1a fuse on the 240v side do as suitable protection. 3) As i have a earth...
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