Popular Circuits Page 45
- Page 45
-
An RF field detector circuit that can be used in measurement and verification stage power antennas and transmitters can be designed using some transistors and common electronic components. This RF field detector circuit is designed with a radio frequency....
-
-
While smoke alarms are quite cheap devices, the cost of 9V batteries quickly exceeds their purchase price. Added to that is the irritation of random beeps from the alarm as the battery reaches the end of its useful life. This circuit allows typical smoke....
-
We always like to use Halloween as a chance to show off neat homemade electronics to the general public. In this special Halloween video tutorial, we have recreated the idea behind a musical instrument called the theremin, and built one into a Halloween....
-
A lot of my projects involve 120VAC, switching relatively slowly. Most people use mechanical relays in that situation, but I don`t like them; I try to avoid moving parts whenever possible. Up to this point, I`ve always used solid state relays. They work....
-
-
In order to manufacture large quantities of anything, there needs to be a manufacturing system or process in place. The manufacturing process can be open loop or closed-loop. In an open-loop system, variables are controlled manually. In a closed-loop system,....
-
-
-
This project has been developed together with some other OMs (in particular Marco IW1DGG) in our local radio club. When we started looking at a simple transmitter providing sufficient power to exice the local ATV repeater we did not find anything simple to....
-
This circuit can be used to test whether mains voltage is present or not without having electric contact with mains line. The CMOS IC CD4033 is the heart of this circuit. The CD4033 consists of a 5 stage decade Johnson counter and an output decoder for....
-
New design techniques in LED driver circuits promise to deliver significant energy savings that will go a long way toward helping TV manufacturers meet the tough requirements for power consumption....
-
This circuit generate sine wave oscillation, but actually we can modify the circuit to generate triangle or square wave function. The frequency can be controlled using current. If we disconnect the 20k RIN from REF (pin 1) and connect it to a DAC, then we....
-
-
In this mode, the timer functions as a one shot. The external capacitor is initially held discharged by a transistor internal to the timer. Applying a negative trigger pulse to pin 2 sets the flip-flop, driving the output high, and releasing the short....
-
This circuit shows about Signal Generator Electronic Circuit Diagram. Features: UNLESS OTHERWISE SPECIFIED, RESISTANCE VALUES ARE IN OHMS, ....
-
Burst Mode operation maintains high efficiency at light loads by reducing IC quiescent current to 120 A. Light load efficiency is also improved with the reverse inductor current inhibit function which supports discontinuous operation. Additional features....
-
-
Two important properties of the 8043 are used to advantage in this circuit. The low input bias currents give rise to slow output decay rates (droop) in the hold mode, while the high slew rate at 6 V/p,s improves the tracking speed and the response time of....
-
Elliot vented 2A3PP line, is also very simple, the key is the quality of the output of cattle. Use 3KPP output cattle, fixed bias (a 62V), output power 15W. 2A3PP suited for th..
-
A circuit diagram and sample code is provided to read and write to 74LC16B memory from a PICAXE microcontroller....
-
The CF5019 series are high-frequency, 3rd overtone crystal Oscillator module ICs. They incorporate an oscilla- tor circuit and an output Buffer that operate at high frequency on a single chip. The Oscillator circuit employs CMOS inverters and a built-in....
-
This is an improved version of headphone amplifier I`ve built many years ago. I wanted so much to share it with you because this simple circuit has done a great service to me through all these years. It is very simple and reliable, hard to break, offers a....
-
Due to the different circumstances of the various input signals, when the pin is applied between the abnormal voltage, protection circuits to form a circuit path from while LSI..
-
In order to simplify the transmitter design, we've used the new pll circuit from Motorola :the MC145170. This PLL includes the prescaler and a serial standard bus called SPI. We advise to use the P2 version that fixes some init issues during the Power Up.....
-
The PZP-1 Piezo Buffer is now available! The PZP-1 is a high impedance buffer preamp, using 100% discrete class-A circuitry. Designed expressly for the Fender Precision acoustic/electric and HMT basses, it can also help other instruments with piezoelectric....
-
There are several sections in this website that you should read regarding track wiring. This section on track wiring, Part I, covers general wiring information, testing, and troubleshooting. Part II contains the actual wiring of track. The menu to the right....
-
Automatic toilet flusher is restructuring in the sitting so that the basis of the ordinary, the automatic flush after use once, simple and reliable. When not in power source co..
-
This buffer amplifier"s overall harmonic dis tortion is a low 0.01 % or less at 3-V rms output into a 500-fl load with no overall feedback. The LT1010CT offers a 100 V/p.s slew rate, a 20 MHz video bandwidth, and 100 mA of output. A pair of JFETs, ]1....
-
As shown, this circuit is suitable for shooting at night and turned on the lights corridor. During the day due to sufficient light, BG3 conduction, SCR blocking oscillation cir..
-
Low Cost Water Pump Controller Circuit. The sensors applied to the circuit could be any two conducting probes, preferably resistant to electrolytic corrosion. For example, in the easiest case, a appropriately sealed audio jack could be utilized to operate as....
-
Uses only six components per stage. Combining of counter and indicator functions gives low battery drain. After reset button is re leased, 0. 22-mid capacitor insures that first stage turns on. Current is drown by stage only when lamp is on. Any number of....
-
A ringer interface circuit, and I`m running into problems that are over my head. The purpose of the circuit is to buffer the output of a central telephone system that goes to several ringers spaced throughout the building. The reason for the circuit is that....
-
Consult Sensirion`s entire Datasheet Differential Pressure Sensor SDP1000/2000 catalogue on DirectIndustry. Page: 7/10....
-
This is basic of workmaship LM35 temperatur sensor, whish is taken from the LM35 spending and boosted again by the amplifier op-amp. High output if the sensor is received by ic LM35 high temperature. You can use the output as driver relay, fan, or other. And....
-
This is a simple NiCd battery charger powered by solar cells. A solar cell panel or an array of solar cells can charge a battery at more than 80 % efficie....
-
Got a 89 s10, 4. 3 with auto trans. someone else pulled the motor I got stuck trying to put it back together. Only problem I have is the starter wiring. Solanoid has one big terminal(goes to hot side of the batt) and one small one with a "S" which I figure....
-
This Outdoor LED Solar Garden Lights project is a hobby circuit of an automatic garden light using a LDR and 6V/5W solar panel. During day time, the internal rechargeable 6 Volt SLA battery receives charging current from the connected solar panel through....
-
Based on the LM733 or NE592, the preamp shown has a bandwidth of 100 MHz. The FET inputs provide about 1-M © input impedance. Q4, Q5, and IC2 provide signal conditioning. ..
-
The transmitter was designed specifically for use by radio amateurs as a radio beacon. As such, it provides a good-quality ..
-
The circuit allows you to eliminate the vocal portion of an audio signal, while leaving the instru mental portion. The circuit mixes two channels that must be 180° out of phase, so the signals that form the center-stereo image is canceled out. Those....
-
-
This is design circuit of bias current compensation circuit. This circuit can operate from MW source resistances with little increase in the equivalent offset voltage. This circuit is based on LM11. This is the figure of the circuit. This is impressive....
-
At the heart of this circuit is a precision integrated temperature sensor type LM35 (IC1), which provides an accurately linear and directly proportional o....
-
As shown using MIC5156- is a composition having a current limiting function, and a lot of high output current is turned off may be low with or without regulator switching regulator circuit. S terminal vacant, and the gate - plus a l6 V Zener..
-
The circuit mentioned here is a small easy to build Intercom circuit using one LM386 IC one 2N3904 transistor and few other components. LM386 is a very famous amplifier ICs mostly used by electronics hobbyists in audio circuits. In this circuit the 8 ohms....
-
Drive a blue or white LED from a low voltage. Normally, if you want to light up a blue or white LED you need to provide it with 3 3. 5 V, like from a 3 V lithium coin cell. But a 1. 5 V battery like a AA cell simply will not work. But using the Joule Thief,....
-
This battery-powered metal detector uses four exclusive-OR gates contained in the 4030 CMOS integrated circuit. The gates are wired as a twin-oscillators and a search coil serves as the inductance element in one of the oscillators. When the coil is brought....
-
-
The LM386 is a power amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external part....
-
A timer circuit using IC 4060 is given here. The IC 4060 is a 14 stage binary counter with a built-in oscillator. R2, R7, C1 are the components that determine the frequency of the oscillator and the outputs will become high one after other and only one at a....
-
This circuit produces a symmetrical waveform when dividing by either 2 or 3. The Divide Select input controls the ..
-
The GPS is based on 24 satellites located in six orbital planes at a height of 20 200 km and circle the Earth every 12 h. Each plane is inclined at 55 to the Earth’s equator and contains four satellites. The GPS positioning is based on oneway time-of-arrival....
-
This circuit is a variable audio bandpass filter that has a low cutoff variable from about 25 Hz to 700 Hz and a high cutoff variable from 2.5 kHz to over 20 kHz. Rolloff is 12 dB/octave on both high and low ends...
-
The piezo element is only connected to Channel 1 (Arduino A[0] port). The channels Ch 1 Ch 6 are connected to female mono jacks and the ground(GND) wiring is in series from jack 1, 2 and 3 so on. till the Ch 6 end to the Arduino GND port. Taped 3 times 787 0....
-
Originally Posted by Spokane1 I have just about all of the parts needed for a first run. Mr. Dollard says he used Teflon coated coax, which is....
-
Figure 2-60 is LM3886 amplifier roar practical circuit, the circuit with one NE5532 as preamplifier, output power up to 200Wo. LM3886 power amplifier for use, due to the large ..
-
Low power dc to dc converter obtained by adding a flyback circuit to a square wave oscillator. Operating frequency is 20 kHz to minimize the size of LI and C2. Regulation is achieved by zener diode D2..
-
In this article we make digital thermometer on the Arduino Uno. In this Digital Thermometer temperature sensor used is LM35DZ. In other applications you can replace with LM35 temperature sensor such as DS18B20 and others. In principle, the sensor will detect....
-
This simple counter can be used to count pulses, as the basis for a customer counter (like you see at the doors of some stores), or for anything else that may be counted....
-
The LTC3455 seamlessly manages power flow
between an AC adapter, USB cable and Li-ion battery,
while complying with USB power standards, all from a
4mm ½§ 4mm QFN package. In addtion, two high efficiency
synchronous buck converters generate low voltage....
-
Lux meter circuit atmel attiny26-16 microcontroller based on the value of the LED displays on the display lux with LEDs placed on 2sk1061 MOS...
-
For those who are looking for a copy of the schematic diagram on this type of Analog Multitester and other brand using the same circuit diagram....
-
-
Many microcontroller designs typically mix multiple interfacing methods. A microcontroller (µC) system can be viewed as a system that reads from inpu....
-
The circuit is built around an LM317T adjustable voltage regulator. Its output voltage (VOUT) is determined by the formula VOUT= l. 25 (1+R2/R1). I chose a 10-k © resistor for R1 and a 100-k © resistor for R2 to allow for a little wasted current flow (around....
-
Most of the power supply failure indicator circuits need a separate power supply for themselves. But the alarm circuit presented here needs no additional supply source. It employs an electrolytic capacitor to store adequate charge, to feed power to the alarm....
-
The following circuit shows about? LM358 IC Solar Controller Circuit Diagram. Features: also as a mobile communications base stations, convert ...
-
Here is a simple circuit diagram I think will work for the charger. I already have the transformer, two SCRs, maybe the capacitor, heat sink, and a case to mount it all in. If you go for lead- acid batteries and forget the SCR`s, or put them in a circuits....
-
This page provided to the domain owner free by Sedo`s Domain Parking. Disclaimer: Domain owner and Sedo maintain no relationship with third party advertisers. Reference to any specific service or trade mark is not controlled by Sedo or domain owner and does....
-
Circuit » Home » 7809 » 7812 » 7909 » 7912 » Dual Voltage » Hobby Electronics » Hobby electronics projects » RC filters » REGULATOR » transformer » Dual Voltage Power Supply 12 Volt This is the simple circuit diagram of Dual Voltage Power Supply. It is used....
-
Triac regulation suited to regulate the power of mains appliances. It can regulate the brightness of incadescent light bulbs, halogen, dimmable energy savers, the power of heaters and other thermal appliances, engine (motor) regulation, etc. Fits as well to....
-
The circuit below is similar to the one above but can be used with a laser pointer to toggle the relay rather than a push button. The IR photo transistor Q1 (Radio Shack 276-145A) or similar is connected to the set input (pin 6). The photo transistor should....
-
A flip-flop that generates two unstable states (high-low) is called astable multivibrator, a fancy name for you to say it`s an oscillator. The very basic of....
-
This circuit uses a dedicated voice integrated circuits Ai (SK- type), its internal features bistable multivibrator and three inverting amplifier. 555 IC A2 for the delay control...
-
The circuit charger is equipped with voltage output settings, so that we can regulate how much voltage to charge the battery. And the settings using the potentio making it easier for us managing voltage up to a mV. See charger circuit below : You are reading....
-
Oscillating circuit (coil) are made on a ferrite bar. If you wish to listen long waves winding "1-2" has 135 turns and 3-4 has 20 turns. If you wish to receive medium wave winding "1-2" has 75 turns, and "3-4" has 7 turns (wire used must be CuEm 0. 15mm). In....
-
-
Using the RE46C140 circuit can be designed a very simple smoke detector alarm using few external electronic components. The RE46C140 IC is a low power CMOS photoelectric type smoke detector IC that will provide all the required features for a photoelectric....
-
The E1T tube you see on the left has been "in the family" for as long as I can remember. Probably my father took it home from work (he worked at the Shell laboratory in Rotterdam) or he bought it in one of the surplus shops in Rotterdam my father and I used....
-
-
This transistor based alarm features automatic Exit and Entry delays - together with a timed Bell Cut-off and system Reset. Along with the Exit/Entry zone - the basic alarm board has one Instant Zone. This will be adequate in many situations. However - the....
-
The Measured Value and The Setpoint are two inputs to a Control System. The Measured Value is the Amplified input of a Transducer or Sensor for some Parameter that needs to be controlled. It could be Pressure or Temperature etc. The Setpoint is the User....
-
A common-emitter transistor amplifier, the opposite phase output signal of the input signal, also known as an inverting amplifier. As this electrical path for amplifying the pu..
-
-
Study the Analog to Digital capabilities of Atmel ATtiny26. This tiny but mighty IC is really a miracle. One special thing is the internal 10-inputs multiplexed ADC circuit which can covert analog voltages to bytes. This check circuit uses only 3 inputs. Of....
-
This Project can be used with the three phase Induction motors. The circuit will take the full control of the motor and it will protect the motor from several faults such us over voltage and under voltage and the circuit will switch on the motor under safety....
-
This project describes how to make a digital voltmeter with a PIC microcontroller. A character based on HD44780 LCD display is used to measure voltage. The PIC microcontroller used in this project is PIC16F688, which has 12 I / O pins of which 8 can be used....
-
-
The design presented here is a little bit unusual in its arrangement, but offers some advantages over the usual designs that I will explain in the following paragraphs. First, let`s start from the basics: A linear power supply has a transformer that steps....
-
You most likely know that LM317 IC is applied as an practical provide regulator, but did you know it can be applied as an audio amplifier This is a Low power Amplifier LM317 Simple Audio Amplifier Circuit a audio designed with LM317 that offers a optimum....
-
Octal Preamplifier can also be built as a stand alone unit without the linestage part. This is not feasable since it has a split RIAA, which means the RIAA EQ circuit is split into two parts, one after the first stage and another one after the second. This....
-
The circuit is based on operational amplifier IC1 used in the noninverting amplifier mode. Rl and 2 set the gain at about 500. RV1 (sensitivity) biases the noninverting input to the negative supply. Ql provides the relatively high trigger current required by....
-
-
Regardless of whether you want to effectively imitate a house fire, a campfire, or light from welding, the circuit described here fills the bill without u....
-
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....
-
-
This circuit monitors car battery voltage. It provides an indication of nominal supply voltage as well as low or high voltage. RV1 and RV2 adjust the point at which the red/yellow and yellow/green LEDs are on or off. For example the red LED comes on at 11V,....
-
FM Wireless Mike can transmit voice signals to any FM Radio receiver 100 meters away. The circuit is basically a frequency modulated transmitter working at 100 MHz. The frequency of the transmitter can be varied slightly by changing the trimmer C5. You can....
-
-
-
This is a very straightforward circuit. The first stage acts as a crystal receiver. Use a germanium detector diode (like 1N34, but AA119 is much more common in Europe), a silicon one won`t do. The frequency is determined by L and C. For the FM band and VHF,....
-