How To Drive | The Science

 

 

The Science

How to drive

Voltage converters allow to increase or decrease the DC voltage. Such converters are found in the various devices, including the monitor, from the screen you are reading these lines. To use for demonstration purposes, you can build a simple push-pull converter voltage on the chip K155LA3.

How to drive

Instruction how to drive

Step 1:

Take a step-down transformer from any small-sized AC adapter (not pulsed). You will use it as the opposite - as a step. To do this, take a miniature neon lamp (for example, type INS-1 or NE-2) and connect it to a high-voltage winding of the transformer.

Step 2:

Take the chip K155LA3. Connect between her findings are as follows: - 1 and 2; - 3, 4 and 5; - 6, 9 and 10; - 8, 12 and 13.

Step 3:

One of the conclusions of the low voltage transformer to connect to the output of 11 chips, the other - from the point of connection of its terminals 8, 12 and 13.

Step 4:

Take resistor 1 kilohms. One of his findings to connect the connection point of the conclusions of the chip with the numbers 1 and 2, the second - to the point of connection of its terminals 6, 9 and 10.

Step 5:

Take the electrolytic capacitor 5 microfarads, rated at no less than 10 V. Its lining connect the negative to the point of connection terminals chips with numbers 1 and 2, the plus - to the point of connection of its terminals 3, 4 and 5. In domestic capacitors close to the positive the conclusion is positive, we imported a number of negative conducted strip of the downsides.

Step 6:

Make a pack of three or four elements of AA or AAA, connecting them in series. The positive battery terminal is connected via a switch to a fourteenth output circuit, and the negative - directly to its seventh output.

Step 7:

Without touching the terminals of high-voltage winding and the neon lamp, turn on the power. Neon lamp lights up.

Step 8:

Constructive design of the transducer depends on the purpose for which it is applied. If you want to use it as part of a low-power flashlight, use compact plastic housing with built-in battery compartment. You can build a detailed layout of the transmitter to the same physical office. To do this, place all the elements on a large sheet of hardboard, which is located vertically, write next to each of them a name. The layout can be placed on the table using the stand or on the wall with screws. Regardless of the performance of the inverter, high-voltage winding of the transformer and neon lamp must be protected against accidental contact.