- #MAC MINI POWER SUPPLY 220V HOW TO#
- #MAC MINI POWER SUPPLY 220V FULL#
- #MAC MINI POWER SUPPLY 220V SERIES#
The LED1 show power on of circuit, which the R3 is its limiting current resistor. This makes constant voltage across the output of 24V. The capacitors C2, C3, C4 acts as a storage capacitor to reduce the noise of output.
#MAC MINI POWER SUPPLY 220V FULL#
This voltage across the base of Darlington transistor Q1 to bias it working full current more than of 2A. Because It is not DC regulated voltage of 24V at 2A.Īfter that, the DC voltage flow through the R1 to Zener Diodes (ZD1, ZD2) to keeps the voltage constant at 25V. Next, A big electrolytic capacitor-C1 filter the pulsating DC to smooth DC voltage of about 36V. Then, the rectifier bridge, D1 through D4, rectifies the AC into pulsating DC. When we feed the AC-voltage to the power cord, transformer T1 changes 230VAC(PRI) to about 24VAC(Sec). Second, we come to see the working of the circuit. The regulated circuit made up of R1, ZD1, ZD2, C2, and Q1.
#MAC MINI POWER SUPPLY 220V SERIES#
Some called it Transistor Series Voltage Regulator If you want to learn more…Click How it worksįirst of all, we see on the 24 volts regulated power supply circuit diagram. This is a type of series voltage regulator. But if we adjust VR1 to low or high resistance close 5K.
When we adjust VR1 to high or low resistance. We can do it with potentiometer VR1 and R1-resistors. But you want to make a 24V 1A regulated power supply. Others parts in the circuit I use as principle above. Look at above 24V 1A power supply circuit diagram. It is easy and cheaper than a Zener diode and transistor regulator. I think using the LM7824 voltage regulator is best.
#MAC MINI POWER SUPPLY 220V HOW TO#
How to use Zener Diode, example circuit usage.Here are a few related articles you may want to read: C3 capacitor reduces the spike voltage of output. WithĬ2 capacitor filter is normal to use 0.05 times of C1.
We use 0.1A transformer only, And the power of R1 is interesting. You use a Zener diode voltage regulator is enough. Watch in the circuit below. If you have a small load using the current lower of 30mA. You need to use 5A transformer, Diodes rectifier is Bridge 10A 100V.Īnd Capacitor filter is 2,200uF x 5 (in parallel) = 10,000 uF 35V (total). If you want more current up to 5A, 8A, 10A. You may use the voltage of the transformer up is 20V. Or the other hand, if you cannot find more capacitors. You may connect them in parallel to more capacitance. You don’t like to calculate a lot, right? Use 2,000uF per 1A load current right now. Capacitor Filter(C1)-It keeps output voltage is stable when using a load. Or you can get 1N4007 in parallel both can get 2A.ģ. In this I use 1N5402, they can give 3A output. Diodes rectifier(D1-D4)-use 2 times of load current.
So, we should 18V 2A secondary transformer.Ģ. If no load the voltage is about 26V.Īnd In load voltage may be lower 22V. Then, How much voltages of the transformer(ACV)?Īs Principle of unregulated power supply DCV is 1.414 times of ACV. Or 1.5A in this case.īut we cannot find a 1.5A transformer. We should it is at least 1.5 times of load current. In the circuit, we have to choose 4 components lists.