This circuit is a high-quality continuously adjustable regulated power supply with a voltage adjustment range of 0-30V. It also includes a current output limiting circuit, which effectively controls the output current to be continuously adjustable from 2 mA to 3 A. This feature allows This stabilized power supply has become an indispensable weapon for circuit experiments. It can limit the current to the typical working current of the experimental circuit and turn on the power boldly without worrying about damage to the experimental circuit caused by large currents due to failure or installation errors.
Technical specifications:
Input voltage: 24V AC
Input current: 3A-Max
Output voltage: 0-30V continuously adjustable
Output current limit: 2mA-3A continuously adjustable
Output voltage ripple: 0.01%
PCB size: 84*84mm
Circuit characteristics:
All in-line components, easy to install and maintain;
The output voltage is easy to adjust;
The output current limit status is indicated by LED;
When the output current exceeds the limit current, it will automatically switch to constant current mode, providing complete protection against overload or failure.
The radiator and fan are not included in the kit, and there is an external 24V cooling fan interface on the board. The adjustment tube of this circuit must be equipped with a large enough radiator or fan to operate with load, remember! Otherwise, the adjustment tube will be damaged due to overheating.
The potentiometer can be directly welded on the board, or it can be led to the panel for installation. The kit is equipped with a connecting socket and a connecting wire
The power transformer uses 24V AC output (or dual 12V, the center tap is empty, not higher than this voltage), and the power can be selected as needed. If 30V3A output is required, the transformer power must be greater than 90W.
1. Set the voltage adjustment potentiometer to a small position (turn it counterclockwise to small), adjust RV1 (100K adjustable resistance), so that the output voltage is 0V, the output voltage does not need to be adjusted, use 24V AC input, the output voltage is about 31V
2. Output limit current setting: Determined by the position of the current potentiometer. The picture below shows 10V voltage and 10 ohm load resistance. Adjust the current potentiometer to make the LED just light up. At this time, the current potentiometer is at the 1A position and the circuit turns to constant current. At this time, adjust the voltage potentiometer, you can see that the voltage will not continue to rise, and the current is maintained at a current limit of 1A
friendly reminder:
The power supply is a high-voltage and high-current circuit, please be careful, otherwise it may cause harm to personal safety! This shop only guarantees the correctness of the kit and circuit, and does not assume any adverse consequences caused by the production!
