Top Circuits Page 109
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When this circuit is connected to a filter and an oscilloscope, the scope displays the filter`s frequency response. A frequency that sweeps from low to high is applied to a filter. An oscilloscope is triggered by* the start of the sweep and ends its trace at....
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A beautiful diy gsm jammer or mobile cell phone jammer schematic diagram for use only in GSM1900 with frequency from 1930 MHz to 1990 MHz. The GSM1900 mobile phone network is used by USA, Canada and most of the countries in South America. This cell phone....
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Based on NE555 this circuit turns on and off the IC output by a momentary switch. In other words it works as a mechanical latching relay, but the circuit backs to the start condition when you switch off the power supply. This feature is often required in....
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The system of using this circuit is positioning a little magnet close to the stalk switch SW1 while being connected to the hand or garments of the individual holding the sack with the use of a tiny cable. Since the circuit is tiny, it can be put in a tiny....
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This variable-frequency, audio bandpass filter is built around two 741 op amps that are connected in cascade. Two 741 op amps are configured as identical RC active filters and are connected in cascade for better selectivity. The filter`s tuning range is from....
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Current-Driven Sallen Key Filter Circuit Diagram he low-pass Sallen-Key filter is staple for designers because it contains few components (A). By redesigning the filter, ..
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By combining a common 78L05 with an integrated audio amplifier of the type TDA2030, an adjustable voltage regulator can be constructed in a very simple manner that works very well. The output voltage is adjustable up to 20 V, with a maximum current of 3 A.....
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This is the circuit diagram of a light activated switch based on National Semiconductors comparator IC LM 311 and a LDR. The circuit is based on a voltage comparator circuit wired around IC 1. The non inverting in put of IC1 is given with a reference voltage....
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The circuit is basically a radio frequency (RF) oscillator that operates around 100 MHz. Audio picked up and amplified by the electret microphone is fed into the audio amplifier stage built around the first transistor. Output from the collector is fed into....
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The second 555 timer was configured as a monostable circuit, commonly referred to as a one shot since an output pulse only occurs if there is a trigger on the input. When this timer is triggered, the potentiometer in the RC timing network allows the output....
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This system is a Drag Race timing system centered around a micro-controller. The system consists of the Christmas Tree (the three yellows, the green and red lights), the fault sensor (checks to see if a racer started racing before the green light), the....
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Read the article and learn how you can make your own parking sensor for just $4.99...
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the RF design and construction of radio frequency oscillators...
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The SLA7062/67 chip is a unipolar driver and can provide up to 3amps. The chip is hard to find and will cost about $10. each. Using Google, I found the three that I needed for my prototypes. Newark (Farnell) sells them but has no stock. The pcb`s can be....
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Commercial FM demodulation is done at the IF frequency of 10. 7MHz. With a frequency deviation of ±75kHz, the deviation of the IF carrier is ±0. 7%. With this deviation, it is possible to convert the FM to AM or PM and AM using passive RLC circuits. The....
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The Dogm-graphics-module should be connected to the Arduino board as shown below. Pin 12 (MISO) of the Arduino board must not be used. Additionally the Dogm-graphics-module requires an addess line (A0) which can be connected to any output port. The following....
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I have since constructed a programming "jig" to avoid keeping the circuit on the breadboard. More detail, and photographs can be found on the Learning About the AVR Parallel Programmer page. ..
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This is the second part of my USB tutorial for ATtiny2313 and V-USB library. In the first part we learned how to get 3. 3V from USB to power our circuits. In this part, we will expand our setup with following parts: Update: Some people have noted that the....
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Having done half a dozen V-USB tutorials I decided it`s time to whip up something cool. As USB keyboards were an area untouched, I decided to make a small USB HID keyboard device that types a password stored in EEPROM every time it`s attached. A new password....
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Enable the Gene to progressively lower the power applied to the heating element, so that rather than switching it on and off, it simply got less hot, minimising the temperature gradient within the drum and the overall maximum temperatures the beans are....
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A mouse has two axes: "X" and "Y". When the mouse is moved "horizontally", the "X" wheel inside the mouse rotates. When the mouse is moved "vertically" (upon a surface), the "Y" wheel inside the mouse rotates. For arbitrary mouse motion, the "X" and "Y"....
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attribution You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work). This file contains additional information, such as EXIF metadata, probably added from....
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Pinout Of The Fa-6 - posted in General Discussion: Hello I am new at this Forum and hope that I will do nothing wrong. My question is how to connect aTape Recorder with ""line in"", ""line out"" and ""remote"" to my new FA-6. On the FA-6 is a 8 Din plug but....
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This is a low cost circuit that adds precise current limit functionality to a voltage regulator...
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An audio compressor serves to reduce (or compress) the dynamic range Figure 6 shows the schematic for a more comprehensive compressor circuit, that offers control over The circuit below is a Dynamic Mic Compressor circuit is simple but the results are quite....
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Schematics circuits for guitar effects with vacuum tubes and solid state electronics. DOD R825 Compressor. DOD 908 Digital Delay. MXR Dynacomp Compressor. Fuzzface Free Electronic Circuits, Diagrams, Schematics and Projects. BBE Opto Stomp Optical Compressor....
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A static device that couples two circuits for the purpose of transferring alternating current (AC) from one circuit to another by electromagnetic induction. The current remains at the same frequency, but may change in voltage, phase, or impedance values. A....
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How to control Christmas Light Displays with a Computer...
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The Triac drivers use the 5 VDC output signal from the 74HC595 chip outputs (Q1, Q2, Q3, Q4, Q5, Q6, and Q7) to switch the 110VAC gate signal to the Triacs. If you are connecting the IC chips directly to the PC, a desktop PC MUST BE USED to drive the....
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The oscillator is designed to tune from 1. 8 GHz to 2 GHz for typical cellular telephony applications. An extended tuning range can be obtained by adjusting the ratio between the varactor capacitance and fixed capacitance in the tank. PMOSFETs are employed....
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How many times you needed some remote control to handle some electric device many times. There are lot of remote controls like infrared, RF, SMS (like my other circuit) and more. The basic small-range remote controls are 2, Infrared and RF (Radio Frequency).....
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So, it turns out that I`m probably not going to use the Hijack approach to getting serial data from my Mindflex into my iPhone. This is mainly due to the fact that I have the majority of the components to build a similar system from scratch. The difference....
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had to rewire a boat trailer due to damaged wiring and lights. I`m using a standard 4 pole flat connection to my truck. The trailer is simple - two rear lights and nbo side markers. Both rear lights are grounded to the harness to the truck. Almost everything....
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I own a 2005 McGregor 26 sailboat. I had a Standard Horizon CP150C installed in my boat. I recently moved my boat to British Columbia, Canada and to my surprise my GPS unit did not power on. Although it is an old model it is brand new. I am the original....
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Details of rigging an Evinrude E-TEC engine, particularly with ICON gauges and ICON controls, and with a special emphasis of NMEA-2000 details and TRIM circuit details...
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Modern ICON electronic engine controls from BRP..
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Explanation of the theory and practice of generating electrical energy from an marine outboard engine using a permanent magnet alternator..
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LED is the most interesting part of amateur electronics hobbyist. The main barer of LED is, it needs minimum 3 vlots to illuminate. I`ve found many circuits to drive LED by a single cell alkaline or manganese cell. ..
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Application Notes, Resolvers as Velocity and Position Encoding Devices, Potentiometer, Incremental encoder, Absolute encoder, Resolver, Inductosyn...
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CoolCAD Electronics, LLC is a CAD and custom electronics design firm that specializes in satisfying non-mainstream electronic design applications..
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This paper describes the process by which a control circuit for a stepper-motor was designed. Due to the nature of the stepper motor, the control circuit had to be a state machine that cycled through four output states based on two input conditions....
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KC2ZPL Web Design, electronics, HAM radio, CW, homebrew construction, general electronics, high voltage, experimenter`s web page...
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Now that I have these power supplies, wouldn`t it be nice to evaluate their performance Traditionally you connect an adjustable load (a "beefy" resistor) to the output and measure both the output voltage and the current in a number of spots. Then it`s easy....
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I`m currently using a Gecko G540 drive module to drive the stepper motors. This module has the ability to drive up to 4 stepper motors. They label the connections as XYZA - we`ll connect the C-axis stepper to the A output and leave the Y output unconnected.....
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This document describes how to read a capacitive humidity sensor directly from a micro controller using 1 resistor, 1 diode the sensor and two IO lines. It does this without an ADC by measuring the amount of time it requires to charge the capacitor through a....
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This is a chronological account of a project I am working on: to design and build my own digital clock. I was inspired by the KABtronics Transisitor Clock. That one is made completely from discrete components, but I wanted to do something less ambitious. I....
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This receiver is a modification of Charles Wenzel`s Two Transistor Reflex Radio. Instead of a ferrite AM loopstick antenna, I use a magnetic loop antenna, and I added an LM386 amplifier stage to drive an 8-ohm speaker. There is a switch to select whether....
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The AmpLoadPull project illustrates the use of the AmpLoadPull and LoadPullSetup components in ADS. These components are part of the ADS behavioral model suite found under the System - Data Models palette. "circuit_level_amplifier_1_tone. dsn" is a schematic....
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The VCA project illustrates the use of the VCA_Setup and VCA_Data components in ADS. These components are part of the ADS behavioral model suite found under the System - Data Models palette. "Amp_wBothMatches_setup. dsn" is a schematic for extraction of....
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The Oscillator DesignGuide is integrated into Agilent EEsof`s Advanced Design System environment, working as a smart library and interactive handbook for the creation of useful designs. It allows you to quickly design oscillators, interactively characterize....
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The IQ_Demod project illustrates the use of the IQ_Demod_Setup and IQ_Demod_Data components in ADS. These components are part of the ADS behavioral model suite found under the System - Data Models palette. "IQ_demod_ckt. dsn" is a schematic for the....
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The IQ_Mod project illustrates the use of the IQ_Mod_Setup and IQ_Mod_Data components in ADS. These components are part of the ADS behavioral model suite found under the System - Data Models palette. "IQ_mod_ckt. dsn" is a schematic for the modulator of....
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Oscillator Cores (cClappCore, cHartleyCore, cModifiedClappCore, and cModifiedColpittsCore) are compatible with simulation and measurement setups outlined by the Generic Oscillator Example. These core oscillator circuits are configured for low resistance....
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3GPPFDD_UE_RX is the test bench for 3GPP FDD user equipment receiver testing. The test bench provides a way for users to connect to an RF circuit device under test and determine its performance using pre-defined test bench measurements. This test bench....
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The Oscillator DesignGuide is integrated into Agilent EEsof`s Advanced Design System environment, working as a smart library and interactive handbook for the creation of useful designs. It allows you to quickly design oscillators, interactively characterize....