Power supply indication block. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Power Supplies
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scheme
Rice. 1 Schematic diagram of the display unit (click to enlarge)
Topology of the printed circuit board of the power supply indication unit
PCB dimensions are actual size. Scale 1:1.
The Rh resistor is needed for the constant glow of the H HG2 segment, or rather a comma. The IN input is fed through a 3,5M resistor (in the author's version, these are two resistors with nominal values of 2,4M and 1,1M) voltage from the output of the power supply. The display unit is powered by a stabilized voltage of 9V. Resistor R5 is multi-turn, type SP5. Its case is glued to the board with "MOMENT" glue and connected with a flexible wire to the R5 points on the board. LED indicators type ALS321A (common cathode).
Author: Anatoly Nikolaevich Patrin, Kirsanov, Tambov region, patrin@tamb.ru; Publication: evm.wallst.ru
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