Tag Archives: making
Making 15W FM RF Amplifier using 2SC253
This is a FM RF amplifier which build based on RF Power Transistor 2SC2539.
2SC2539 is a silicon NPN epitaxial planar type transistor designed for RF power amplifiers in VHF band mobile radio applications.
L1: 2T Coil diameter:4mm
L2: in series 6pcs Toroidal ring
L3: 4T Coil diameter:10mm
L1: 3T Coil diameter:10mm
Posted in Electronic Circuit Also tagged 15W, 15Wの、, 15W的功率，, 2SC2539, 2SC2539、, 2SC2539，, Amplificateur, Amplifier, Anwendungen, Applications, décisions, Fm, machen, mobile, Radio, RF, Verstärker, आरएफ, आवेदन पत्र, एफएम, एम्पलीफायर, निर्माण, मोबाइल, रेडियो, 、意思, アンプ、 アプリケーションでは、, デロンギ、, モバイル, ラジオ、, 决策，, 射频, 应用，, 收音机，, 放大器，, 移动，, 调频， Leave a comment
Making 22W Power Amplifier using TDA1554
Making 22W Power Amplifier using TDA1554
Circuit diagram with main power IC TDA1554, this circuit works up to 22W.
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
U1__________TDA1554 Two Channel Audio Amp Chip
Making 22W Power Amplifier using TDA1554
Posted in Electronic Circuit Also tagged 22W, Amplifier, Circuit, Electrical Circuit, Electronics, electronics project, power, TDA1554, Using Leave a comment
Making USB using RS232 converter
Making USB using RS232 converter works really well with all the devices I tried.
USB to RS232 converter can also use FT8U232AM and Maxim-IC MAX235
If no FT8U232AM, could also use TTL level RS232 signals.
The FT8U232AM and supporting components are also available as a complete module – called USBMOD1 – in 32pin DIL IC packages, making the [...]
Making FM transmitter 0,4 W
Circuit electronics FM transmitter 0,4 W
12-14 V stab., 100 mA
RF : 400 mW
Impedance : 50-75 ohm
Frequency range : 87,5-108 MHz
Modulation : wideband FM
C1, C2, C12 – 100 pF (ceramic)
C3, C5 – 0,22 uF (electrolytic)
C4 – 1,8 nF (plastic)
C13, C16, C17, C19 – 1 nF (ceramic)
C8, C9 – 10 pF (ceramic)
C10 – 47 pF (ceramic)
C11 – [...]
Posted in Electronic Circuit Also tagged 0, 4 W, BB109G, BB409, BBY31, BC547B, BC547C, BC548C, BFR91A, BFR96, Fm, Transmitter, varicap Leave a comment
Making Electronic Circuits Alarm for anti-fire
Making Electronic Circuits Alarm for anti-fire
This circuit warns the user against fire accidents.
It relies on the smoke that is produced in the event of a fire.
When this smoke passes between a bulb and an LDR, the amount of light falling on the LDR decreases. This causes the resistance of LDR to increase and the voltage [...]
Posted in Electronic Circuit Also tagged alarm, anti-fire, circuits, Electronic, TDA2002 Leave a comment
Making Audio with AN7116 Schematic audio amplifier