5 Volt TTL Voltage Monitor

This is a simple device designed to control supply voltage +5 V Monitor provides information signals TTL level, accompanied by the LED display, indicating that stress or deviated from the nominal value, or vice versa, is in a “box”.

The basis of the device is a low-current window comparator IC LTC1042 company Linear Technology . The reference voltage is 2.5 V ± 0.005 V for the middle “window” created by zener D1 and fed to pin 2 comparator. The width of this “window” equal to 20% (± 10%) of the reference voltage established at pin 5 chip divider R4, R5.

The controlled voltage is divided by two resistors R2 and R6, and fed to pin 3 of the chip. Voltage at the terminals 2 and 3 are compared with the established view of the deviation (10%, output 5). The green LED D2 is illuminated when the voltage is within the desired range. If the voltage is out of range, red LED D3.

In conclusion, the resistors R2, R4, R5 and R6 must be highly accurate. Linear Technology recommends the admission of 0.25%.

psu

Recent Posts

Universal Battery Charger for Charging up to 18V Cell

This universal battery charger has regulated output voltage which can be adjusted as you need.…

5 years ago

Auto Switch-Off Power Supply (Variable Output 3.7V to 8.7V)

Here is the auto switch-off power supply which will turn off itself when there is…

6 years ago

High Voltage, Low Current Power Supply (2000VDC from 15VDC)

This is a high voltage, low current power supply capable to deliver 2000VDC output from…

6 years ago

15V 1A Regulated Symmetrical Power Supply

This is the easy built 15V 1A regulated symmetrical power supply capable to deliver stabilized…

7 years ago

12V / 3A Regulated Power Supply

Here we provide a powerful 12V / 3A regulated power supply circuit. Of course the…

7 years ago

How To Repair Computer Power Supply

If the power supply is damaged or does not work, the computer also will not…

7 years ago