In a circuit adapted to supply a voltage Vs an electronic device, such as a load or a light source said voltage Vs is led to a circuit (ACG) that is able to derive a voltage VACG from Vs where VACG≠Vs. The circuit consist in a first embodiment of three serial coupled diodes (D1,D2,D3) and two capacitors (C1,C2), and where the capacitor (CI) is coupled in parallel with tow of the diodes (D1,D2) and the capacitor (C2) is coupled in parallel with the diodes (D2,D3). In this way an Asymmetric Current Generator (ACG) is provided, that from a normal periodic source voltage Vs can derive two voltages both of which are suitable for a rechargeable battery or a light source. In this way a cost effective voltage in which the voltage required for the electronic device is beneficial for recharging the battery or strengthen the light for a LED light source leading to save in current cost and a fast recharging of the rechargeable battery and gaining light from the light source. The invention also covers uses of the Asymmetric Current Generator (ACG).