In my head an easy solution would be to use a voltage controller that outputs DC, but I can't find one with the right specs (apart from the large, workbench style power supplies, which are no good for my application). Lastly, the components I have are spec'd at 220V, but it seems that 220 and 240 are treated as equivalent. Is that right? However, you can use 12/3 and just ignore one of the wires. The safe way to do that is to bond the red wire to ground at every junction. That way, if it is ever wired to current somewhere in the system, the circuit will immediately short and your circuit breaker will break the circuit. I want to buy a AC voltage converter for frequent international travel with some small appliances, and should support step up and down between 110V and 220V; found this one The standard electric outlet in the United States is 120V and will be able to directly power fans that have 120V within its range such as 110V, 115V, and 120V AC fans. For example, a fan might state 220V on its label but it will be able to run on a 230V power source. Europe uses 230V as its standard for electricity. What will happen with a valve amp is that filaments get over run. If you have a 220 to 6.3 vac filament supply then the ratio is approx 35:1 meaning 220 volts gives 6.3 volts. 245 volts would give nearer 7 volts. Also, the HT supplies will rise by a similar percentage. Using European 230V 50hz Appliances in the US. johandj73. Jul 11, 2012. In summary: South Africa is rated 230V 50Hz. Your electrical equipment may not work in the US if it is not rated for 240 volts. You will need to purchase a transformer to use your 220V appliances in the US. It would be best to buy the appliances you need in the US and then This is why more and more buildings in the US are being built using a 220v system instead of a 120v .So in reality the 220v system is the smartest thing anyone could do for their home. Also those with a 220v/240 system can always use a plug in step down transformer at any power outlet to reduce the voltage to 110/120v for other appliances For a bright red LED, use 1.990VDC (about 5mA): To drop to 1.990V from 220VAC, you can either use a voltage divider (with suitable current), or a single resistor. In the case of a single resistor, you can use a 61K resistor: (220 * Math.sqrt(2) - 1.99) / 0.005 => 61827.39674441618 A close common value is either 68K or 56K. G957.

can i use 230v in 220v