Showing posts with label 12. Show all posts
Showing posts with label 12. Show all posts
Monday, September 8, 2014
Build a Power Supply Variable 1 3V 12 2V 1A Wiring diagram Schematic
Build a Power Supply Variable 1.3V - 12.2V 1A Circuit Diagram. In this schema R2 to set the output voltage. The maximum current is determined by R3, over-current protection schema inside the LM723 to detect the voltage on R3, if it reaches 0.65 V, the voltage output will be off her. So the current through R3 can not exceed 0.65 / R3 although output short-schema in his.
Power Supply Variable 1.3V - 12.2V 1A Circuit Diagram
C3 and C4 are ceramic capacitors, as much as possible directly soldered to the PCB, this is because the LM723 is prone to oscillation that is not cool.
LM723 works with 9.5V input voltage to 40 V DC and the LM723 can generate its own current of 150mA when the output voltage is not more than 6-7V under input voltage.
Specifications:
Output (value estimated):
Vmin = (R4 + R5) / (R5 * 1.3)
Vmax = (7.15 / R5) * (R4 + R5)
Imax = 0.65/R3
Max. Power on R3: 0.42/R3
Min. DC Input Voltage (pin 12 to pin 7): Vmax + 5
Parts List:
B1 40V/2.5A
C1 2200uF (3300uF even better)
C2 4.7uF
C3 100nF
C4 1NF
C5 330nF
C6 100uF
Green LED D1
D2 1N4003
F1 0.2A F
F2 2A M
IC1 LM723 (in a DIL14 plastic package)
R1 1k
R2 Pot. 5k
R3 0.56R/2W
R4 3.3k
R5 4.7k
S1 250V/1A
T1 2N3055 on a heatsink 5K / W
TR1 220V/17V/1.5
Thursday, September 4, 2014
6 12 Volt audio amplifier circuits
The above is an amplifier circuit using supply voltages from 6 volts DC to 12 Volt DC. Power output of the amplifier is quite low with only 1 Watt 8 ohm impedance. You can apply this to the audio signal amplifiers that require strengthening are not so large as in the pocket radio.
Thursday, August 28, 2014
Power Amplifier 2 x 12 W by TDA2007
TDA2007 Amplifier Circuit , this is stereo power amplifier with power output 2 x 12Watts . Minimum voltage require 8 volts and maximum voltage require 26 volts , with DC supply voltage. Impedance output is 8 ohms. See schematic diagram below :
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