| 摘要 |
<p>PURPOSE:To suppress the cost of products by simplifying the structure of the products and at the same time provide load controlling circuits and load controlling apparatuses with improved durability. CONSTITUTION:An oscillation circuit part 21 and a load driving circuit part 22 are installed in rheostatic control 1. The oscillation circuit part 21 is an astable multivibrator and is provided with a phototransistor PTr and a transistor Tr2. A light emitting diode PD is installed at the position on the opposite to the phototransistor PTr. Driving electric power V0 is supplied to an anode of the light emitting diode PD and the cathode of the diode is connected with a base of the transistor Tr2 through a resistor R4. One ends of capacitors C1, C2 are respectively connected with both ends of the resistor R4 and the other ends of the capacitors C1, C2 are connected with the ground through an electric power source line L2.</p> |
