Showing posts with label 12v. Show all posts
Showing posts with label 12v. Show all posts
Thursday, October 30, 2014
12V Battery Checker Circuit
This is a 12V battery checker circuit that uses 3 LEDs that light up at their respective voltages. The red LED lights up when the battery voltage is between 8 to 10V, the orange one at voltages between 10.5V to 12V and the green one when the battery voltage is above 12.5V.
This is a tried and tested battery checker circuit using one NPN and one PNP transistor. A PCB is given along with the schematic.
Tuesday, August 26, 2014
22 watt 12v audio Amplifier
This is a good news for the vehicle owners. Because This 22w audio amplifier works with 12v current.so you can use this one as an audio booster for your car set.And this schema gets only 60w .so you can operate your schema easily.when you operate this schema use 4 ohm speakers.8 ohm also works.The schema operates at 12 Volts at about 5 Amps at full volume.use a good heat sink for the chip.
Parts
U1 TDA1554 Two Channel Audio Amp Chip
R1 39K 1/4 Watt Resistor
C1,C2 10uf 25V Electrolytic Capacitor
C3 100uf 25V Electrolytic Capacitor
C4 47uf 25V Electrolytic Capacitor
C5 0.1uf 25V Ceramic Capacitor
C6 2200uf 25V Electrolytic Capacitor
Tuesday, August 12, 2014
500W 12V to 220V Inverter Wiring diagram Schematic
This is a 500W DC-to-AC inverter schema diagram which produces an AC output at line frequency and voltage. 12VDC to 220V 50Hz inverter schema will power 220V or 110V appliances from 12V car battery. The schema is easy to make and is low cost. Use proper transformer. The output (in watts) is up to you by selecting different power rating transformer and power transistor rating. If you load electronic device which require 120V AC, then use transformer with 120V in output
Monday, August 11, 2014
Build 12V to 9V DC Converter
To get a more precise output voltage, replace zener diode Z1 with 10V and R1 with a 1Kilo ohm potentiometer. A Coolrib for Q1 is optional but highly recommended. You can replace Q1 for a more robust type to get more output amps depending on your requirements. Simple schema to power your 9 volt cassette recorder and other stuff.
Parts List:
R1 = 560 ohm
C1 = 1000uF/40V, Electrolytic
C2 = 10uF/25V, Electrolytic
C3 = 330nF, Ceramic
Z1 = 9.1V, 1watt zener
Q1 = ECG184, NTE184
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