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Simple 12V 1A LED Power Supply - with schematic and transformer autopsy
Today I took a look at a very cheap Chinese 12V 1A adapter from Ebay. The listing says it is for LED strips, CCTV, routers, audio/video equipment, etc. This AC/DC adapter has 100-240V universal mains input and 12V 1A DC output. I took a look at the board layout, reverse engineered the relatively ...
Transformer type AC Adapter repair
Replacing the filter capacitor in a plug in AC-DC transformer. The current inverter type adapters so common now in stores do not work properly with some applications. That was the case here, so lets fix the original.
How To Use A Step Up/Down Transformer
Step up/down transformers allow you to step up 110/115/120 volts AC to 220/230/240 volts AC or step down 220/230/240 volts AC to 110/115/120 volts AC. This is very helpful when you need to use a 220/230/240 device in the U.S. and you don’t have a 220/230/240 wall receptacle available or don’...
How to make Transformer-less High Voltage AC to DC adapter using old phone adapter
Transformer-less High Voltage AC to DC adapter using old phone adapter How to make Transformer-less AC to DC Converter Circuit (250 Volt to 60 Volt) | Homemade - https://youtu.be/OlhvNhMoQF4 ***Important Notes *** 1. Can power 20 led to 50 leds 2. Input 100 v to 250v 3. Output volt and current...