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One is in good shape, made in 1979, and capable of producing sine, triangle and square waveforms. This one is retained and used as main function generator for testing purposes at my main office location. Other three were not working, or working sporadically.....
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Another method of using opamps to regulate a power supply is shown below. The power transformer requires an additional winding to supply the op-amps with a bipolar voltage (+/- 8 volts), and the negative voltage is also used to generate a reference voltage....
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TDA integrated circuits series are very well apreciated and used in amplifier designs and projects. TDA audio amplifier circuits are produced in generally by Philips and SGS-THOMSON. The most used ICs are TDA2030 and TDA2003 for small audio amplifiers kits....
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This tutorial is about mp3 mode of WTV020SD-16P module. With this simple circuit, you can play AD4 format music files. At the end of the article, you can see a video output of this simple and easy project. I used a 5V and a 3. 3V regulators for this project.....
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EncoderBit1(LOW) is negated with the hex inverter U5A and sent to the 4-input AND gate U3A along with EncoderBit0(HIGH), the above J-K output (HIGH), and a HIGH value from Vcc. -During these 5 seconds, the encoder knob is rotated so both bits are set LOW.....
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In this time I will share about the circuit voltage stablizer or stabilization using IC 7815 and 7915, with a minimum of 17. 5V to 50V input. The output of this circuit will issue with the current 15V voltage in accordance with the input. Stabilizer is also....
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Version V2. 9 supports also GPS-receiver with ANTARIS chipset and simultaneously using of internal temperature sensor of MS5534A and external DS1820 sensor. This version can use 24C256, 24C512 or 24C1024 EEPROMs and has an internal `bootloader` implemented.....
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The diagrams a circuit which performs this function with 0. 25% exponential conformity over a range from 20 Hz to 15 kHz using a single LM392 and an LM3045 transistor array. The exponential function is generated by Q1, whose collector current will vary....
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Many households are still graced by tube-type television sets. If you want to connect one of these large tellies to your stereo system to improve the sound quality, this is usually not a problem because there are plenty of SCART to Cinch adapters available....
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This will walk through adding hardware to a Linksys WRT54GL wireless router that will take advantage of existing connections on the PCB for two UART connections, which will be exposed as DB9 serial port connectors mounted to the faceplate of the router.....
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Interfacing ADC to 8051 microcontroller. ADC0804 is interfaced to microcontroller AT89S51. Complete circuit, theory and program in assembly language....
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The voltage requirement the Solidus is desirous of is quite a bit higher than your circuit provides I know Chris. It was....
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This is design circuit for UHF transmitter circuit. The TV transmitter circuit is working on the UHF channel, 470-580 MHz frequency channel 21-34. This transmitter can radiate as far as 30-100 meters by using a cable 10-20 cm. This is the figure of the....
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By using the preamplifier with a short length of shielded cable and clip leads, signals that generally could not generate a readout, generate precise and stable readouts on the counter. The DPDT switch is used to bypass the circuit when amplification is not....
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The world`s first practical crystal amplifying device, in 1948, and the dawn of the commercially available Transistor Radio in Britain. If I had been an average radio enthusiast or constructor at that time then I would have been coming to terms with the new....
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A negative output voltage dc to dc converter generates a -5V output at pin A. In order to generate -5V at point A. the primary of the transformer must fly back to a diode drop more negative than -5V. If the transformer has a tightly coupled I : 1 turns....
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FM wireless Mike is a small electronic project based on a radio transmitter. It is a wonderful idea to make a wacky talky through which you can talk to your friend, next door. Just speak or play into the microphone and you ’ll broadcast to an FM receiver at....
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The M15m Tracking Transmitter is a modified version of the M15 Animal Tracking Transmitter. It has been designed to be used on 147. 460 MHz using an inexpensive 49. 152 computer crystal and for printed circuit board construction. The M15m transmitter is a....
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Looking for an efficient USB charger that can operate from a 12V car battery? This unit functions at up to 89% efficiency and can charge USB devices at cu....
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Dear Susan, your amp is similar to this one which has even a lower parts number. It deserves to be built!....
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This circuit provides a visual 9 second delay using a 7 segment digital readout LED. When the switch is closed, the CD4010 up/down counter is preset to 9 and the 555 timer is disabled with the output held high. When the switch is opened, the timer produces....
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To see how RFM12B wireless compares to other similar wireless options (e. g Xbee, XRF etc. ) check out this well compiled comparison overview byStuart Poulton:. 3 different ISM band frequencies: 433MHz (worldwide), 868MHz (Europe), 915MHz (USA & Australia....
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Here is a simple RF bug detector that will help you detect spy bugs and can operate up to 2 GHz. Below are some essential things required for this circuit:....
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I done some more playing with the LTspice simulation of Dxvideo`s preamp-with-DC-Servo circuit. I have been using the .four command to have spice....
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Hi-fi 100W mosfet power amplifier circuit . Operates from 45v dual supply. 100W to 8 ohm speaker, 160W to 4 ohm speaker, low distortion....
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KIA6924S is designed for muting the popping sound made at power of ON-OFF receivers, pre-amplifiers, main Amplifiers and other electric Audio equipment as well as the noise made at changeover of switches. By Korea Electronics (KEC) ..
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With the Control "On the PCB", set at these Positions* CX = CW Center CCW 100 pf = 6, 400 hz 12, 050 hz 26, 000 hz 470 pf = 1, 525 hz 3, 200 hz 7, 232 hz. 001 uf = 681 hz 1, 425 hz 3, 250 hz. 0022 uf = 348 hz 619 hz 1, 540 hz. 01 uf = 69 hz 146 hz 340 hz.....