单个三极管组成的简易可调直流稳压电源电路图
功能及原理描述
下图是一采用单个三极管组成的可调直流稳压电源电路图。变压器T1将市电(110V或220V)降压到交流8V左右，再经整流桥BR1及滤波电容C1整流滤波后约为11.52V直流。三极管2N1613为调整管，输出电压在6V到~12V可调，调节电位器P1可调整输出电压。如果输出纹波比较大，可以在输出端增加几个10uF到100uF/25V的电解电容或钽电容。
注意：三极管要加散热片散热。
Description
T1 steps down AC voltage from 115VAC (or 220VAC) to about 8VAC and is then rectified via bridge rectifier BR1 to about 11.52Vdc. C1 filters off the AC ripple. If you find the circuit output too noisy add another electrolytic capacitor over the output terminals. Value can be between 10 and 100uF/25V. The output voltage is variable with the 10K-potentiometer while keeping the current constant.
器件清单
T1 = 115/8 VAC transformer. Center Tap not needed.
Q1 = 2N1613, NTE128, or substitute. (TO-39 case) On coolrib!
BR1 = 40V, 4A. (Check max current of your mini-drill and add 2A)
R1 = 470 ohm, 5%
R2 = 1K, 5%
P1 = Potentiometer, 10K
C1 = 1000uF, 25V, electrolytic
C2 = 0.1uF (100nF), ceramic
