The buffer op-amp circuit or Used for coupling two circuits together or the Unity Gain Follower Voltage Follower used to transfer or copy a voltage from a first circuit (Vin) to a second circuit (V out)The input has high impedance, and the output is low impedance. such as the differential family of the IC or transistor that’s not good impedance matching.The op-amp IC objects have the output low impedance and input high impedance. When connected to other circuits, so there is no any effect.The gain is equal to 1 always. Does not to change any signal Vin = Vout. This circuit is an example of a buffer op-amp circuit, use IC Number LM741 performs this function very well, does not require any additional equipment.Signals can be used with any format, but the frequency response up to 1Mhz, and limit the maximum voltage level power supply circuit is about 18V. For [...]
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Buffer op-amp / Unity Gain Follower using LM741
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Single Polarity Supply by IC LM741
This is a simple Single polarity (negative to positive polarity) power supply circuit,For education, the work of a series op amplifiers.Since we use the input pin is a pin non inverting, it is an important condition. We try to come to see this circuit use op-amp IC LM741, be usable easily and, It can change R1,R2 for fix the expansion ratio has of the circuit with. See the detail in the circuit adds. the input power must be negative only As a result, the output voltage. However, if the input is positive, it will not delete the output. Because we used the power supply terminal positive and negative only.Or 4 pin connection with the ground.This circuit may be adapted to the negative circuit. Or to converter a negative voltage to positive voltage. Related Links Negative to positive polarity Positive voltage modify LM741 op amp circuit Linear Regulated Dual Polarity Power [...]
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Micro Inverter by 2N6121
This is Micro inverter or The inverter very small-sized, perform modify from the energy battery the small-sized , have the value voltage about 220V AC Volt 50HZ. By the circuit composes 2 transistors performs pulse oscillator generator or Square wave generator, for drive the coil transformer have voltage tall about 220V at 50Hz frequencies. By can change the value RC when give the frequency can modify. This circuit have current about 100mA depend on the transistor and Transformer. The detail is other total up PCB see in a picture below. Circuit Micro Inverter by 2N5121 Diagram Micro Inverter by 2N5121 Related Links Solar panel micro inverter 12Vdc to 220Vac inverter Inverter 12V to 220V 300W by NE555,2N3055 mini inverter 10W-30W by Transistor D313 Simple High Power inverter by 2N3055
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Easy Novel Buzzer
This novel buzzer circuit uses a relay in series with a small audio transformer and speaker. When the switch is pressed, the relay will operate via the transformer primary and closed relay contact. As soon as the relay operates the normally closed contact will open, removing power from the relay, the contacts close and the sequence repeats, all very quickly…so fast that the pulse of current causes fluctuations in the transformer primary, and hence secondary. The speakers tone is thus proportional to relay operating frequency. The capacitor C can be used to “tune” the note. The nominal value is 0.001uF, increasing capacitance lowers the buzzers tone. Designed by Tom. Source :: http://www.zen22142.zen.co.uk/Circuits/Alarm/buzzer.htm Related Links More small speaker circuit More about buzzer sound circuit Door buzzer sound Mini Metronome by 555 Simple Metronome using transistor small Metronome using 2N3904 Simple light sensitivity Metronome using 2N3904 Door buzzer with 555 Self-Resonance Piezo [...]
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Doorphone Intercom by IC LM386
For the first time, this circuit was designed by two authors, Mr Laurier Gendron of Burnaby in British Columbia, Canada, and myself. Please make sure you visit Laurier’s web site, Handy Dandy Little Circuits. This page is also available in French by clicking on the flag. In this doorphone circuit,an 8 ohm speaker is used both as a microphone and also an output device. The BC109C stage amplifies in common base mode, giving good voltage gain , whilst providing a low impedance input to match the speaker. Self DC bias is used allowing for variations in transistor current gain. An LM386 is used in non-inverting mode as a power amplifier to boost voltage gain and drive the 8 ohm speaker. The 10k potentiometer acts as the volume control, and overall gain may be adjusted using the 5k preset. The double pole double throw switch, reverses the loudspeaker positions, so that [...]
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20 Output Sequencing Circuit by IC digital
I to see this circuit in web http://home.cogeco.ca/~rpaisley4/Traffic145.html good idea circuit. Basic Circuit Operation The circuit is stepped through the sequence by an adjustable LM555 astable oscillator. The Oscillators output is divided by a 74LS90 divider into a 10 step BCD weighted output. The BCD output then drives two 74LS145 – 1 of 10 decoders (See Notes) that are used to produce a 1 of 20 step output sequence. Notes The circuit does not drive the 74LS145′s directly but uses a JK Flip-Flop (74LS107) and four – dual input OR gates (74LS32) to control to the inputs to the two output drivers (74LS145) This arrangement alternately creates disallowed states in these devices. The disallowed states prevent any of the ten outputs on that particular device from being turned ON while the other 74LS145 is in counting to ten. This produces a system where only one of the 74LS145′s is able [...]
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Simple Miniature Motor Controller by LM317
I got this from a dosing pump control circuit. we use cool IC is no. lm317 circuit, It can uses with power supply source 24VDC and adjust voltage output 1.25V to 24V for DC motor 24V. It is really simple motor control circuit. because there are a few parts and easily to build. Read More Source : http://www.geocities.com/dsaproject/electronics/cook-book/cook-book.html#5 Related Links Simple motor control circuit DC motor driver PWM Control Speed Motor 12V By TL494 PWM Motor Speed Controller – DC Light Dimmer by IC LM324 PWM Speed Motor Controller By IC 555 Stepper Motor Driver using L298 and L297 DC Motor Driver with L6203 PWM DC motor control with SG3525
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Free drawing circuit diagram License LGPL
Today younger brother generation that study same college comes to see at a house and beg to seek design good circuit and free. I advises a program TindyCAD because it drawing circuit diagrams commonly known as schematic drawings. It supports model the equipment is a lot of and still apply to PCB layout programs change the system netlist formats. Besides still be usable cooperate SPICE simulation netlists get as well. About the copyright be model freedom License LGPL be usable get freely model open source. Link : http://sourceforge.net/projects/tinycad/
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Loud ringer for phone using KA2411
This phone is loud ringing tone circuit for generating the electricity bell in the old telephone. This circuit is relatively loud. so can use to replacement the same ringer or the original telephone may be lost. We do not need a new phone. This circuit is easily to build, because it uses a single IC as shown in figure below. Before you read working this circuit. I suggest a simple ideal is: Detect ringing signal tone with light and sound The detect ringing signal tone circuit with light and sound.It is easy to use and good quality, Do not enter the power supply. Which as Detect ringing signal tone circuit Or ring tones on the telephone line, a signal incoming calls. When an incoming call,When an incoming call, The C1, C2, will act as a coupling signal AC Volt to diodes D1, D2.Signal voltage is reduced down to approximately 10V.By [...]
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A on-shot circuit ideals
The digital circuit additional a circuits taht is very useful is On-Shots circuit or Also known as Mono-stable multivibrator circuit. This behavior is the input trigger signal into just a single pulse,which is usually a lot of thin or narrow. And then this circuit will output is pulse out there. But width of the pulse width can be set to a value more or less. As needed with configuring the device in circuits. There are several characteristics of this circuit, which I gather is the following. Simple Monostable Multivibrator by IC CD4528 This the Simple Monostable Multivibrator circuit. That interesting by use IC CD4528 , be IC CMOS perform be Dual Monostable Multivibrator or One shot. When encourage at input make have a signal pecks at 2 output by have differently. Pulse duration and accuracy are determined by external timing components R1 and C1. Wide supply voltage range 3.0V to [...]
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0-99 counter by IC 4017×2
When you want the counter circuit since 0 arrive at 99. I thinks this circuit may on the same wave length you certainly. it uses IC LM4017 decade counter/divider follow circuit picture. When feed a signal clock at 14 pin cause the position logic at a pin output. From 0 to 99 for switch S1 perform choose RUN or Reset. Please see circuit picture will understand increasingly. Almost forget integrated number this circuit, want the fire feeds 3V low arrive at 15V because be IC digital CMOS there. Related Links More circuit digital counter More decade counter circuit More digital circuit PIC16F84A 3.5GHz LCD Frequency Counter Electronic Doorbell & Counter by 4026 4-digit Up-Down counter with PIC 16F88 0-99 Two Digit Counter By IC 74LS48 , 74LS90 circuit 4013 Modula-8-Counter Simple Digital Counter by 4026
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Power Amp Super Bridge 120W by IC TDA2030
This be Super Bridge 120W Power Amplifier by IC TDA2030 for you like the circuit amplifies that use the integrated circuit. and Transistor BD249 or TIP31 or TIP41 or C1061 and BD250 or TIP32 or TIP42 or A671. It is nice circuit and easy to use. circuit Power Amp Super Bridge 120W by IC TDA2030 [...]
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Pulse delayer by ic 4528
The Pulse delayer circuit this use IC 4528 help delay pulse or oscillator the all. For a signal is pulse that postpone long ago go up. By fix give R1 control while delay , R2 control the wideness of pulse to delay. The detail is other see in circuit picture. Circuit pulse delayer by ic [...]
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Brake lights flasher circuits
This circuit will allow the brake light was flashing.The default behavior. When the power supply to the circuit, Or tap the brake it.The IC timer IC2 drive current to transistor Q2 and producing oscillator output, pulse signal output at pin 3 to input pin 1 of IC1-CD4024. Count pulse and stops counting after 8 pulses, [...]
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Small FM radio receiver
This circuit is FM radio receiver that very small size and works well, although the sensitivity is poor. The principle of this circuit is to use the generator frequency circuit. Which consists of Q2 and Q3, they work by producing a frequency sync with the frequency has been derived. By the Q1 which acts as [...]
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Sine wave oscillator low frequency-constant amplitude
In the Sine wave oscillator circuit often to be use the thermistor and Incandescent lamp, for upset the output of circuit has fixed value, the resistance of the thermistor dependent on temperature and as a result to voltage drop across of it. From the slow response of the thermistor make to properties of temperature against [...]
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