Description

This product is DIY. PCB is printed with corresponding component models No other information. Only sell to those who understand. Please don't shoot those who don't understand

Information link: //pan.baidu.com/s/1weOKGs4MtM5YVNuLn_KQ1Q

Extraction code: s4ab

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When electronic enthusiasts do various circuit experiments, they need a stable voltage power supply with excellent performance to provide DC voltage. Although switching power supply has the advantages of high efficiency and small size, it inevitably remains high-frequency interference, while linear regulated power supply is still an enthusiast or even a professional manufacturer due to its extremely low interference and good isolation.

This circuit is a high-quality continuously adjustable voltage stabilizing power supply, with a voltage adjustment range of 0-30V. It also includes a current output limiting circuit, which effectively controls the maximum output current from 2mA to 3a continuously adjustable. This feature makes this voltage stabilizing power supply an indispensable tool for circuit experiments. It can limit the current to the typical maximum working current of the experimental circuit, and boldly turn on the power supply, There is no need to worry about the large current damage to the experimental circuit due to faults or installation errors.

Technical specifications:

Input voltage: 24V AC (maximum)

Input current: 3A (maximum)

Output voltage: 0-30V, continuously adjustable

Output limiting current: 2mA-3A continuously adjustable

Output voltage ripple: 0.01% (maximum)

PCB size: 84 * 84mm

Kit weight: 0.086KG/set

Circuit characteristics:

All in-line components are easy to install and maintain;

The output voltage is easy to adjust;

Output current limit state is indicated by LED;

When the output current exceeds the limiting current, it will automatically switch to the constant current mode to provide complete protection against overload or fault. The kit does not include radiator and fan, which can be self prepared or purchased in the store. There is an external 24V cooling fan interface on the board. The adjusting tube of this circuit must be equipped with a large radiator or fan before it can run with load. Remember! Otherwise, the adjusting tube will be damaged due to overheating.

The potentiometer can be directly welded on the board or led to the panel for installation. The kit is equipped with a connection socket and a connection wire

The power transformer shall be 24V AC output (or double 12V, with the center tap vacant, no higher than this voltage), and the power can be selected as required. If 30V3A output is required, the power of the transformer shall be greater than 90W.

Circuit adjustment:

1. Set the voltage adjustment potentiometer to the minimum position (turn it counterclockwise to the minimum), and adjust RV1 (100K adjustable resistor) to make the output voltage 0V:

The maximum output voltage does not need to be adjusted. 24V AC input is used. The maximum output voltage is about 31V:

2. Setting of output limiting current: it is determined by the position of the current potentiometer. The following figure shows 10V voltage and 10Ohm load resistance. Adjust the current potentiometer to make the LED just light up. At this time, the current potentiometer is at 1A position and the circuit turns to constant current state. At this time, adjust the voltage potentiometer to see that the voltage will not continue to rise and the current will remain at 1A current limiting state:

Friendly tip: The power supply is a high-voltage and high current circuit, please be careful, otherwise it may cause harm to personal safety! Our shop only guarantees the correctness of the kit and circuit, and will not bear any adverse consequences caused by the production!