Vacuum Tubes Valves
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Human Sensing Circuits
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AC to DC & DC to DC
Solar Cell Circuits
Micro Power Circuits
Switching Power Supplies
Light Laser LED
Digital to Analog
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Data Bus Circuits
Voltage to Pulse
Current to Voltage
Frequency to Voltage
RF Converter Circuits
Sine to Square Wave
Voltage to Current
voltage to frequency
Period to Voltage
Video Wall circuits
TV Video Circuits
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8051 / 8052
PCB CAD Software
Car bike Circuits
555 Timer Circuits
Remote Control Toy
H Bridge Circuit
DIY HV Variable Cap
DIY PMA alternator
Interconnection & Timing
Digital Signal Integrity
Digital & Bipolars
Sensors & Detectors
Regulated Power Supply
4 Band Resistor
5 Band resistor
6 Band resistor
DTL internal structure of the inverter circuit
DTL internal structure shown in the inverter circuit (M5936P) is. Inputs with diodes, transistors signal processing, power supply is + 5V. When the input terminal A high level
CD4001 composed of single-channel modulator
Core elements of this circuit is the second four-input NOR gate terminal IC CD4001, the entire circuit is simple structure, less components, easy to make, especially for remote
Inverter air conditioner current detection circuit
Current-voltage conversion circuit is often used in the current detection circuit, shown 6-19 ring inverter air conditioner current detection circuit, the circuit is mainly use
MOS FET inverter
FET can be used as a linear amplifier, a logic gate circuit may also be made,
Simple 100W inverter schematic design
Explanation Here is a simple 100-watt using IC CD4047 and IRF540 MOSFET of the inverter circuit diagram. The circuit is simple, low cost, or even assemble a veroboard. CD 4047
Efficient inverter control circuit
Efficient inverter control circuit It shows a highly efficient inverter control circuit, which is used as the LCD backlight power supply circuit, which is mainly controlled by
FSK Demodulator/Tone Decoder with RC2211N
A monolithic phase locked loop for data communications. The IC contains a basic phase locked loop for tracking an input signal within the pass band, a quadrature phase detector which provided carrier detector and an FSK voltage comparator which provides FSK demodulation. In the circuit shown, the IC is used as an FSK demodulator such as would be...
A very simple motion transducer can be constructed using the circuit shown. The output is biased to one-half the supply voltage. This requires special interface circuitry for the signal readout. One simple method is to use a zero center meter in a bridge configuration. Displacement now can be measured as a positive or negative meter reading.
25kHz using thyristor inverter welding machine circuit
25kHz using thyristor inverter welding machine circuit Using high frequency 25kHz, thyristor inverter arc welding machine, which can be smaller transformer, the circuit shown i
A common car inverter circuit diagram and working principle
A common car inverter circuit and working principle Car Inverter indicators: Input voltage: DC 10V ~ 14.5V; Output Voltage: AC 200V ~ 220V 10%; Output frequency: 50Hz 5%; Outpu
NE566 frequency modulator
A frequency modulator configured NE566 integrated voltage-controlled oscillator shown in FIG. When the signal input terminal potential DC position, forming a cycle of constant
Two inverter controlled synchronous motor of the second circuit
Adjust potentiometer RPi and RPz, two motor speed can be changed.
Analog switches carrier suppression amplitude modulation circuit
Analog switch (double loop, double-break) and differential modulation amplifier complete the work. The carrier control switch, switch contacts in the time, from the inverting i
Made with hex inverter DC DC converter circuit
As shown by a circuit TTL hex inverter can constitute a DC/DC converter, the 5V into 12V. This circuit provides all the functionality required for DC/DC conversion. The circuit
Sensitive frequency demodulator LM565 LM111
As shown for the sensitive frequency demodulation circuit. The circuit uses IC LM565 phase-locked configuration, can track the frequency offset over a wide frequency range. How
FM demodulator circuit diagram 567
As shown in Figure 567 FM demodulation circuit. The figure, the FM signal from the input pin 3, the demodulated signal output from 5 feet. FM demodulation circuit can signal ce
Three-phase step wave inverter output transformer winding connection and the output voltage waveform
As shown, (a) for the three-phase step wave inverter output transformer winding connections; (b) in FIG its output waveform.
As shown, by connecting the two FETs, and form a CMOS digital inverter.
A common car inverter circuit and principle
Car Inverter indicators: Input voltage: DC 10V ~ 14.5V; Output Voltage: AC 200V ~ 220V 10%; Output frequency: 50Hz 5%; Output power: 70W ~ 150W; conversion efficiency: more tha
Interface circuit fsk modulation and power lines
Circuit serial coded modulated control signal, amplify, and transmit high voltage isolation. 556 time base circuit and R1, R2, C1 and R3, R4, C2 form two astable multivibrator,
14MHz SSB 10mW transceiver
The whole Construction : You can call the transceiver like this as "OZL type". Characteristics of the "OZL type" are as follows. 1. Single conversion super. 2. Using two DBM-s as modulator and converter. 3. Modulator DBM is used as demodulator in receiving time. 4. All amplifiers are used in transmitting and receiving time. 5. Case is...
Pulse Width to Analog Voltage Demodulator Circuit
This is a design circuit for a pulse width to analog demodulator circuit. This circuit is used to demodulate the pulse width to analog voltage level. This is the figure of the circuit; Using input pulse width range of 0 to 1 microsecond, this circuit can produces Output range of 0 to 10 v. The input pulse is integrated and the final value is held
am/fm radio & Pilot 100 stereo demodulator
As the number of stations increased and the power levels also increased; receiver performance had to improve. The pentagrid converter, such as the 6BE6 tube (British EK90 valve), was introduced which was optimized for mixer performance. This included the isolation of local oscillator and input signal as well as allowing the first grid and cathode
AN7415 FM Stereo Demodulator
Welcome to the weblog where we discuss about electronic circuits schematics, PCB design, diy kits and electronic projects diagrams. The circuit shown is a stereo FM PLL demodulator designed based on the AN7415. C1 is the input coupling capacitor to block any DC voltage present on the multiplexed input signal. LED D1 is an LED and R1 is the curren
XR2212 PLL FM demodulator Circuit
A simple PLL FM demodulator circuit using IC XR2212 is shown here. XR2212 is a highly stable, monolithic PLL (phase locked loop) IC specifically designed for communication and control system applications. The IC has 0. 01 Hz to 300KHz frequency range, 4. 5 to 20V operating voltage range, 2mV to 3Vrms dynamic range, high temperature range, TTL /...
Demodulator circuits assembly
lm1596 single sideband ssb suppressed carrier demodulator
A very simple single sideband (SSB) suppressed carrier demodulator (product detector) circuit can be designed using the LM1596 balanced modulator-demodulators IC. The carrier signal is applied to the carrier input port with sufficient amplitude for switching operation. A carrier input level of 300 mVrms is optimum. The composite SSB signal is app
tda9887 if pll demodulator fm radio circuit
The IC is an alignment-free multistandard (PAL, SECAM and NTSC) vision and sound IF signal PLL demodulator for positive and negative modulation, including sound AM and FM processing. A special function is implemented for the demodulation of FM radio signals (fRIF = 10. 7 MHz).
QPSK Demodulator Is A Good Match For Low-Cost Modulator
This demodulator is suitable for the quadrature phase-shift keying (QPSK) modulator previously published by the same author, "Novel Low-Cost QPSK Modulator Needs No Adjustments" (electronic design, Sept. 16, 2002, p. 92). Also based on common CMOS logic, it requires no adjustments. These characteristics make it appropriate for low-cost application
LM1800 Stereo Demodulator
Build your own Accurate LC Meter (Capacitance Inductance Meter) and start making your own coils and inductors. This LC Meter allows to measure incredibly small inductances making it perfect tool for making all types of RF coils and inductors. LC Meter can measure inductances starting from 10nH - 1000nH, 1uH - 1000uH, 1mH - 100mH and capacitances f
It takes a 32. 768 kHz IR input and outputs a logic low when the input is present. I see 3 distinct stages. everything up to U1A, everything between U1A and Q3 and everything to the right of Q3. I follow the left and the right. but not the center which is where all the magic happens. Can anyone explain the piece in the middle It makes no sense...
op amp IR Demodulator Design
Designing an IR demodulator circuit to replace the one shown in this question. Basically I want to demodulate a simple IR signal modulated at 32. 678 kHz. I just need to know if the signal is present. No packets. Just IR present or not present. I have tried simulating this in LTspice with no success so I am not sure if I`ve done something ver
555 Timer Circuits
RC Model Toy Circuits
H Bridge Circuits
Ultrasonic distance finder circuit
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is measured. There are three main categories of distance measurement methods in use: a) By...
Simple Metal detector circuit with CD4030
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to find something potentially valuable, hidden a few centimeters below the soil. So many...
Fully automatic watering circuit for flower pots
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This circuit comes as a solution to this problem. Depending on humidity of the pot at...
Simple deep searching metal detector circuit
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the circuit of this metal detector, it is possible to detect a metal coin in depth of 90 to...
Sub-Harmonic Bass Converter for Electric Guitars
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound, such as filtering or distortion. Instead, a frequency division system produces outputs...
Echo Depth Sounding Sonar for Boats
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the calibration of the rope. This arrangement still exists in some yachts. The big...
100W HiFi Audio Amplifier Circuit
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power supply must be symmetrical so that no electrolytic capacitors are needed at the outlet....
Plant-Pot Water Level Indicator Circuit
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower. The circuit of the device is shown in Figure 2. The water detection is made from the bottom...
Analogue Sound Preasure dB-Meter Circuit
The best human ear can capture sounds from 20Hz to 20KHz. These limits are known to be the broadest that can exist. Normally the normal limits range from 100Hz to about 13KHz and depend on the age and health of the individual. We for our measurements and to have a good accuracy we will get the limits of 20Hz to 20KHz. A sound to be heard does...
DIY HV Variable Capacitor
DIY PMA Alternator Plans
Digital Signal Integrity