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Power-on Reminder with LED Lamp

Power-on Reminder with LED Lamp

4

6

3

1

5

IC1

NE555

7

2

8

+

+

16

11

15

3

8

13

IC2

4017

14

Q0

Q9

T

R

R1

10M

R2

6.8M

VR1

1M

C1

10μ

25V

C2

0.01μ

R3

10K

LED1

R4

470Ω

PZ1

BUZZER

9V

BATT.

VR2

50K

LED2

WHITE

R7

100Ω

T1

BC548

LDR1

T2

BC548

R6

12K

R5

1K

D5

1N4001

D6

1N4001

C3

4.7μ

25V

+12V

GND

S1

ON-OFF

SWITCH

+

C4

2200μ

25V

Power-on Reminder with LED Lamp

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0
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publish time: 2020-09-22
Kiraaaa

In many cases, the device on the workstation has not been turned on. In this case, the equipment may be damaged due to overheating. This is an additional device used for the power supply of the workbench. It will sound an alert about every hour to remind you of the power-on status of the connected device. The buzzer lasts for about 20 seconds. It also has a white LED that can provide enough light to locate faults.

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