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1-9V regulated power supply digital display circuit

2016-12-06 22:24  
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1-9V regulated power supply digital display circuit
1-9V regulated power supply digital display circuit
The adjustable regulated power supply which is made by the LM317 is common, the 1-9V regulated power supply additional device is as shown in the figure. This regulated power supply can output the DC 1~9V according to the need, and it chooses the red LED digital tube to display the output voltage of 1~9. The LED digital tube 7-segment display codes are as shown in the table, the coding is finished by the S1 abd VD5~VD17 (in the table, 1 means light, 0 means extinguishing. S1 and S2 can use the band switch to restructure, the circuit is simple, with the connection method of the figure, you can do it by yourself.