ElectroSuite.com – This 30 Watts VHF Power Amplifier was designed for the purpose of increasing an input signal of 4 Watts to 6 Watts operating on the VHF radio frequency band specifically the FM band with 88 to 108 MHz frequency.
This Remote Control Tester using TSOP 1738 circuit is very efective to test the remote control which is still function or not, and will be tested by using Infra Red, for example remote control for TV, Radio, AC, etc.
This is 12VDC 220VAC 100W Mosfet Inverter Electro Suite, can invert the voltage from 12 Volt DC into 220 Volt AC with the power of 100 Watt.
Using the MOSFET as the amplifier and the heart of this circuit is IC CD4047 as function of Multivibrator Astable. The Frequency can be modified by VR1, the multivibrator output of CD4047 as the complement squarewave for the driver of MOSFET T1 and T2.
Transformator with the current of 2 until 3 Ampere, with the primary coil of 0V and 220V as the output and the secondary coil 12V CT as the input that driven by MOSFET T1 and T2.
This is 3 in 1 Sirens using Transistor Electro Suite, we can get 3 sound using this 3 in 1 Sirens using Transistor circuit, Fire Brigade, Police and Ambulance.
From the voltage of 12V we will get the current of about 180 mA.
Source : extremecircuits.net