220v -> 110v

Hello, All! Preamble: I have a 4.5V 0.6A power supply designed for a ~120V 60Hz network. Made in China, from a player or phone - I don’t remember, network Its contacts are flat, and the left one is slightly wider than the right one. Transformer inside secondary winding with a midpoint, i.e. this is "full wave single phase" rectifier based on a midpoint transformer." I needed to turn it on at 220V. I took a high voltage diode IN5406 (600V 3A), soldered it in series with the primary winding in order to cut off half sinusoids and thus get a trance input, albeit a little clumsy, but 110V. I plug this product into the socket, examine it, and smell it. Everything seems OK. I'm reaching out behind the voltmeter and suddenly I hear hissing and a small “bang”... The wiring to the trans burned out, the diode (600-volt!) broke through. What did I do wrong? I have a similar power supply, but at 9V... WBR, Jason. /*e-mail: jason2000(scary dog)yandex.ru ICQ: 62235830*/ /np:/ *silence*

Don't slaughter the cash cow that lays golden eggs, Valerij...! 27 Jul 03 05:20, Valerij Kozhevnikoff -> All: VK> Preamble: I have a 4.5V 0.6A power supply designed for a ~120V network VK> I needed to turn it on at 220V. I took a high voltage diode IN5406 VK> (600V 3A), soldered it in series with the primary winding in order to cut VK> half a sinusoid and thus get a little trance at the input VK> clumsy, but 110V. Valera, is this some kind of joke? :) If it's not a joke, then: using a diode you created a constant component of the input voltage and applied it to the primary winding; in other words, turned on the transformer into the DC network the voltage is, however, about 156 volts :) . A diode rated for 3A burned out - according to the current (assuming 10A). We calculate the power applied to the transformer winding: about 1.5 kW. The winding also burned out. With the best - Wlodek # wlblack(@)newmail.ru # http://wlodeks.narod.ru [ZX] [500:95/462@ZXNet] [2:5016 Forever] [Golyanovo] [Old Russians]

Hello Valerij! 27 Jul 03 05:20, Valerij Kozhevnikoff -> All: VK> Preamble: I have a 4.5V 0.6A power supply designed for a ~120V network VK> 60Hz. VK> I needed to turn it on at 220V. I took a high-voltage diode VK> IN5406 VK> (600V 3A), soldered it in series with the primary winding in order to cut Have you ever wondered why they don’t use a diode in switches 220-110? ;) VK> half a sinusoid and thus get a trance at the input let Think about how a trance differs from a simple piece of wire... And why if the wire unwind from the trance - then he will make a short circuit... VK> a little clumsy, but 110V. He also needs the other half. VK> I have a similar power supply, but at 9V... Tear off the secondary winding from the stabilizer, measure what happens there, and modify the stabilizer accordingly... Best regards, Evgeniy.