The amplifier uses a hybrid two-channel IC STK4241-II manufactured by SANYO. Immediately, it is worth noting that the pinout of the STK4241 is compatible with such chips as the STK4201V-series (THD = 0.08%) and the STK4141-series (THD = 0.02%). In the archive for download you will find 5 technical descriptions (DATASHEET) on STK4201, STK4211, STK4221,…
Often there is a need to control the working time of the device powered by mains voltage. Different time switches are available in the market, but most of them require time-consuming configuration. In particular, when control is limited to an automatic shutdown after a set time, such solutions become ineffective. For this purpose, the described…
Dual, independent power supply, designed to polarize condenser microphones with voltage of +48 V. The built-in transformer and compact size of the board allow you to install the power supply in any electroacoustic device. Recommendations: the device will be particularly useful for constructors and service technicians of audio equipment and for testing microphones. It consists…
The aim of the project is to create a control unit, a controller, for the purpose of lighting the staircase. Stairs, respectively. each staircase is illuminated by an LED strip. The lighting responds to passing people and adequately evaluates the ambient light level. Parameters such as light time, light speed, length of light shine, etc.…
The output transistors MJL21194 are of great power and performance. They must be very well adjusted with through screws, washers and nuts and properly insulated from the heatsink with mica insulators. Remember to use silicone grease and tighten the screws very well, so that the heat is transmitted from the transistors to the heatsink. After…
To reproduce the audible bandwidth, three speakers must be used to complete the audible spectrum, since a single speaker can not emit the frequencies; Between 20 hertz and 20,000 hertz, this audible band is divided into three speakers, like this: Woofer – Responds to low frequencies. Medium (MidRange) – responds to mid frequencies. Tweeter –…
Making an Amplifier is sometimes very challenging in the Amplifier. It is important for us to use easy-to-process material for the amplifier box, because the indicator, fan and so on. In order to have a fine workmanship for the sections, there is usually no equipment and materials suitable for these jobs in the amateur workshop.…
The dual channel amp volt meter circuit allows simultaneous measurement of 2 DC voltages and 2 currents on the LCD screen. Voltage measurement: 0-100 VDC or 0-10 VDC, Current measurement range 0-10A or 0-1A. The operating voltage of the circuit is between 8v-30v DC and does not require calibration. The heart of the meter is…
NE555 10A PWM Circuit TECHNICAL CHARACTERISTICS – Power supply: 12 to 24 VDC – Maximum output current: 10 A – Designed for low voltage motors – Adjustable frequency between 300 Hz and about 2 kHz – Current protection adjustable between 0 and 10 A – Rotation speed adjustable between 0 and 100% – MOSFET with…
0-30V 0-10A laboratory type adjustable power supply I mentioned in the article of the relay bypass circuit for regulated power supplies, the K7200 kit version is 1/1 clone There is almost no difference except a few changes in PCB design and the use of 6 power transistors. LM723 amplifiers were used at the control level…