How to Reduce DC Power Supply Voltage?
1. Resistance voltage division
What voltage should two loads in a continuous circuit withstand? In order to observe the proportional relationship between the resistance of two loads, the total impedance of the circuit is 100%, and the percentage of each load in the total resistance determines the voltage it can withstand.
In the current state, voltage cannot be divided in this way because the impedance of the integrated circuit may change during operation, resulting in changes in the received voltage. For integrated circuits, such voltage fluctuations can prevent them from functioning properly.
2. Communication voltage division
The AC generator is controlled by a transformer, then converted into DC pulses through a silicon bridge, and finally rectified.
You can choose this method according to your own situation, the disadvantages are obvious. Firstly, the original 9V DC power supply must be converted to AC power supply, as some losses may occur through the vibration circuit. Secondly, the volume of voltage controlled transformers is quite large. Finally, silicon bridges and rectifiers can also cause some losses. Therefore, it is recommended that you do not use this method unless it is necessary.
3. Diode voltage reduction
After installing a diode on the resistor, connect the serial circuit to the power supply to reduce the voltage, and then connect the rectifier. Choose a good voltage regulator diode, reduce the DC voltage to the desired level and load it.
This method has significant power loss, and designers' diodes and resistors may be damaged due to overcurrent and overheating. If you are more concerned about the size, you can use it, but the disadvantage is that the power loss is significant. Firstly, large DC power supplies are not durable for a long time. It has the advantage of being simple and can be hard installed regardless of the power source.
4. DC chopper voltage divider
DC chopper is used to control the DC voltage and then control the output of the rectifier.
This method is recommended for use as it has relatively low losses and has achieved good operational results. The disadvantage is that the circuit is more complex and the price is slightly higher.
5. Reverse voltage regulation of power supply (self created)
A 9V DC power supply is connected in reverse series with two 1.5V continuous batteries, so that the power supply can output a voltage of 6V.
This method is simple, easy to use, easy to purchase, and has a small size. The disadvantage is that this method is theoretically weak, may have unknown effects on the circuit, and has low load capacity.
