Schematic 1.3 Volt Power Source

This circuit diagram represents a resource replacement for 1.3V mercury cells or other small batteries. It has various applications, including use in computers to activate a front panel multi-adapter equipped with a digital thermometer. The circuit draws power from the PC, utilizing a power connector cable with a color code: red and black for a 12V supply and black and yellow for a 5V supply. Given the high voltage levels, it is crucial to exercise caution to prevent short circuits, and it is recommended to include an inline fuse rated at 100mA.

The circuit employs a voltage regulation mechanism to convert the higher voltages from the PC power supply to the required 1.3V for the mercury cell replacement. The primary components of the circuit include a voltage regulator, capacitors for smoothing, and possibly a diode for reverse polarity protection.

The voltage regulator can be a low-dropout (LDO) type, which allows for efficient conversion of the 5V or 12V input down to 1.3V. The selection of the voltage regulator should consider the maximum current requirement of the load connected to the circuit, ensuring that it can supply sufficient current without overheating.

Capacitors are used in the circuit to filter out noise and stabilize the voltage output. Placing a capacitor at the input of the voltage regulator can help to smooth out any fluctuations in the power supply, while an output capacitor can enhance transient response and stability.

The inline fuse is an essential safety feature, protecting the circuit and connected components from potential overcurrent situations. A 100mA rating is appropriate for this application, as it allows for sufficient current flow while providing a safeguard against short circuits.

In summary, this circuit diagram serves as a practical solution for replacing small batteries in various applications, particularly in computers, by utilizing an efficient power conversion method and incorporating safety measures to ensure reliable operation.This circuit is a circuit diagram of resource replacement 1.3V mercury cells or other small batteries. This has many uses and you can use this circuit in the computer to turn on a front panel multi adapter which has a digital thermometer.

This circuit took power from the PC. Power connector cable has a color code, red and black is 12V supply, black and yellow is the 5V supply. This is now so high that the absolute care must be taken to avoid short circuit and inline fuse of 100mA is recommended

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