# Tagged Questions

240 views

### Step-down transformer AC to DC voltage conversion problem?

I got a step down transformer from an old black and white CRT TV that is about 18v 0 18v, 10A AC current output. I wanted to convert AC to DC, so used four 1N4007 diodes as a bridge rectifier. When I ...
107 views

### Deliberate Power Supply Sag

I have a 1W push-pull guitar amp circuit where the 9V power supply deliberately sags to ~8V when strumming the guitar. Believe it or not this is important to the sound - it modifies the otherwise ...
154 views

### Transformer output voltage equations?

I'm looking for equations on how to calculate output voltage of a simple power supply made of a step down transformer with Rs secondary resistance, a bridge rectifier and a capacitor with different ...
252 views

### 5V 1A from 24VAC transformer with grounded secondary

I built a power supply for a micro-controller board that requires 5VDC and peak of 1A (typically sits at 500mA). The power supply has an input of 24VAC. I used a bridge rectifier and an LM2575-5 ...
156 views

### Rectifying induced current without using any semiconductors

Consider a 1:1 transformer. Short DC pulses are applied to the primary (input) coil. Once it's positive current pulse, once it's negative current. It's not strict alternating current (i.e. two ...
89 views

### Help With Paper Calculation for Peak Rectifier Design Problem

I am tasked with designing a circuit for the following particulars: A peak rectifier will be used as part of a DC power supply to supply an average DC output voltage of 15V, with maximum +/- 1V ...
216 views

### Can I use more diodes to reduce the voltage off a diode bridge?

I have a transformer labeled as providing 9Vac, 3.36 A. It appears to provide 9.4 v ac according to my multimeter. It runs through a diode bridge (WAB 040 diodes -- already fried the last version), ...
509 views

### How can I power and dim two sets of LED lights where one requires12VAC and one 12VDC

I am building a wall unit and I would like to use some LED Tape Light (12VDC, 48ft Total 1.45W/Foot) to light the shelves. Then I'd like to use a 12VAC adjustable LED spot light (5W) for the center ...
663 views

### Center tap split supply question

Lest's say that I have the following setup: a split supply (using two voltage regulators: a positive and a negative one) connected to a center tapped transformer (12-0-12). The output of the ...
804 views

### Isolation Transformer

When a function generator is used to power a full wave rectifier an oscilloscope will not show the correct output due to a shared ground. A half wave is displayed because one of the diodes is ...