Connecting the LCD indicator. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Ham Radio Technologies
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You have purchased a liquid-crystal indicator for the manufactured device with leads sputtered onto glass, but without a rubber contact comb. And how to connect it?
Very simple! It is necessary to prepare tinned pieces of wire with a diameter of 0.1 - 0.2 mm and glue them with conductive glue to the contact pads of the indicator - these will be wire leads, which can then be soldered. There are many recipes for such glue, I use a mixture of Moment glue and graphite powder obtained from a collector graphite brush using a finely notched needle file.
The concentration of the powder is best chosen empirically. The more powder, the less contact resistance, but the thicker the mixture will be and the more difficult it is to use. If the electrical resistance of the bonding does not exceed 30 kOhm, the adhesive can be considered suitable.
The contact surface of the indicator is wiped with alcohol and dried thoroughly. Wire leads are applied to the sprayed contacts, glue is applied drop by drop and kept at room temperature for 1,5 ... 2 days. It is desirable that the leads fit snugly to the pads. After that, with a narrow screwdriver, carefully remove possible short circuits between the terminals under a magnifying glass.
Author: S. Rychikhin, Pervouralsk, Sverdlovsk region
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