New Circuits Page 97
- Page 97-
Using the following circuit, with 12V appplied to the motor, and either high (5V) or low (0V) to each transistor through a 1k resistor. The transistors used are TIP 142 and TIP 147. The diodes I am using are 1N5817. When I apply 0V to R2, R1, and 5V to R3,.... -
This RF probe can be used at High Frequency (HF) or Ultra High Frequency (UHF) on both 50 and 75 ohm coaxial cables. In addition the RF voltage can be measured under load or no-load conditions which allows the circuit to double as an RF Watt meter. The RF.... -
The input stage is the most critical for common-mode rejection and noise. We used a Burr-Brown INA121 differential amplifier, set to a gain of 10. The input stage is DC coupled. With a 9-volt supply, a differential DC offset of up to about a volt is.... -
The NAND gates use CMOS 4011 chip, a low power component that is suitable for this battery-operated circuit. You can see that this chip is supplied by a 5V voltage coming from an LM7805L regulator. You might wonder what the purpose of this regulation is,.... -
When doing DC analysis, all AC voltage sources are taken out of the circuit because they`re AC sources. DC analysis is concerned only with DC sources. We also take out all capacitors because in DC, capacitors function as open circuits. For this reason,.... -
High linearity analog optocouplers provide the versatility required to meet a wide range of analog isolation needs. For designers of high voltage applications, high linearity analog optocouplers can reliably send analog signals across very high voltage area.... -
The user interface will consist of a single button and several LEDs or a RGB LED through which all user communication will occur. An overview of the proposed system states and transitions is given below. Pressing the button will wake the device up from sleep.... -
given motor coil while motor need controllers to adjust position and speed. Then you will needa motor driverto amplify a controller`s low output current to a larger current that is required by a motor. Below is an article that describe you about how to.... -
This small video transmitter is very usefull for video surveillance on short distances ( up to 100m ) equipped with a black and white or infrared camera module it delivers excellent pictures on a standard color or b/w tv. Instead of BFY90 you can use any VHF.... -
-
Charge your iPod without connecting it to a computer! Using the USB port on your computer to charge your player s batteries is not always practical. What.... -
This LED flasher circuit is a classic two transistor flip flop. This flasher circuit is very popular and it`s usually the first circuit to build when starting electronic circuit building hobby. Here is the schematic diagram of the famous LED flasher circuit:.... -
The Spartan-6 board has 16 LEDs Connected with FPGA I/O pins (details tabulated below). The cathode of each LED connects to ground via a 330 © resistor. To light an individual LED, drive the associated FPGA control signal to High... -
The lower FET operates in common source mode, while the upper FET, operates in common gate, realising full high frequency gain. The bottom FET is tunable allowing a peak for a particular station. Coil details follow:.. -
This is a mini FM transmitter built and powered using 2 transistors, designed by Tony van Roon. This small transmitter is simple to build and its transmissions could be picked up on any common FM radio. It possesses a range of approximately 1/4-mile (400.... -
This circuit uses a 1458 dual op-amp to form a radar detector. C1 is the detector of the radar signal. The first op-amp forms a current-to-voltage converter and the second op-amp buffers the output to drive the piezo transducer. R5 sets the switching.... -
sections you can follow in this datasheet applications are general design consideration of the 555 timer, frequently asked applications question (FAQ), design formulas, and sample of some ingenious applications. The sample of applications were presented such.... -
There is also a version without SMD. This version is called 2. 1, slightly larger (80 * 100 mm) and equipped with dual drivers (to 1A load), but runs with the same software. The input voltage of the external power supply is fed to X2 (15V), type of.... -
This circuit provides a digital square wave that can be viewed directly or used to drive other circuits. It used the CMOS 4047 Low-Power Monostable/Astable Multivibrator. As used in Tom Duncan`s Adventures with Digital Electronic`s Book, to drive CMOS Decade.... -
This is a single zone alarm - with independently adjustable Exit, Entry and Siren Cut-Off timers. It will accommodate the usual types of normally-closed input devices - such as magnetic-reed contacts, foil tape and PIRs. If you wish - you can use a mains.... -
Much of the focus around residential gateways designs has focused on distributing communication connectivity within a home or residence. But, in order to distribute content, gateways must first have an effective WAN interface that provides access to cable.... -
This circuit SP6691 has been designed to provide a high output voltage with a lower voltage boost Regulator by adding a charge pump circuit. This circuit CAN take a standard 30V boost Regulator and make it a 60V boost Regulator if needed. All of the testing.... -
The following circuit shows about Designing Simple Digital Multimeter Circuit Diagram. This circuit using the ADD3501. Features: combines (volts, .... -
This be LED VU Meter by IC LM3914 circuit show with LED convenient for the stereo or sound all signal. This easy circuit again because use IC LM3914 show get 10 the level. Build easy because use the integrated circuit just one and the price is inexpensive..... -
In the 100-kHz application from left to right, the coupling network feeds into the receiver ~section on the bottom of the chip. (The external components are summarized later.) The receive data output is pulled up via RPuLL ~ 10 K!l. A minimum current of 10.... -
Uses controlled variation of amplifier bias current IABC in CA3080A variable opamp to obtain effective gain control of signal. Variations in amplitude of modulating voltage Vm change bias current through Rm to give amplitude modulation of carrier. -"Circuit.... -
The pcb of this circuit must be placed near the antenna, in a small metallic box. This VHF antenna circuit must be powered from a 12 volts DC power supply circuit, you can use a 12 volt battery, because the current consumption of this circuit is very low.... -
This circuit is a single transistor flyback (Joule Thief) circuit that features a third coil. With it, flash duration and brightness is much enhanced, without resorting to large value capacitors. .. -
This circuit represents a somewhat unusual blinker indicator for use in a car or model. The running-light display progresses toward the left or the right depending on which directional signal is activated. That`s pretty cool if you`re fond of light-show.... -
On the rise of the second clock cycle, output "0" goes LOW and output "1" goes HIGH. This process continues across the tenoutputs and cycles to output "0" on the eleventh cycle... -
.png "Home security alarm system circuit diagram")
Have you ever thought aboutimplementing your own home security alarm systems It`s one of the simplest and interesting circuits for electronic beginners. Our new home security equipment uses aLDR (Light Depended Resistor) to detect security problems. Theft.... -
Common to all the devices is that they emit intense red light with a wavelength of 660 nm. Some biophysicists claim that light of this wavelength can have a positive effect on the human body and can initiate healing processes. This so-called phototherapy` is.... -
NiMH CHARGER Circuit diagram using ADM66A Searches related to CHARGER Circuit, nimh charger circuit, lead acid battery charger circuit, lipo charger circuit, automatic battery charger circuit, simple battery charger circuit, lithium battery charger circuit,.... -
Doorbell for the Deaf. Circuit : Andy Collinson Email: [email protected] This circuit provides a delayed visual indication when a door bell switch is... -
This circuit was developed to charge the Lithium-Polymer cells used in a model aircraft. Lithium-Polymer cells are incredibly lightweight compared to Ni-cad battery packs of the same voltage and amp-hour rating. Their only drawback is that they require a.... -
The regulated output voltage varied as the unregulated DC voltage changed, and that changed as the load current or the incoming AC line voltage was varied. There was no easy fix to the existing circuit that would solve this problem. Eric WB6FLY had already.... -
A step-down circuit used to approximately divide by two the rms voltage between the line input and the inductive load (L1) is shown on circuit diagram below. A turn-on delay of approximately 7 ms is provided by C2 and R3. We can discharge C2 at each line.... -
-
The MK-219 is a popular large-diaphragm condenser, designed and produced in JSC Oktava`s factory in Tula, Russia. Since its release (in the West) in 1994, it has had a reputation of offering a great value for the price, which at the time was over $500. These.... -
a programmable clock timer circuit that uses individual LEDs to indicate hours and minutes. 12 LEDs can be arranged in a circle to represent the 12 hours of a clock face and an additional 12 LEDs can be arranged in an outer circle to indicate 5 minute.... -
The HIP6302 Multiphase PWM control IC together with its companion gate drivers, the HIP6601, HIP6602 or HIP6603 and Intersil MOSFETs provides a precision voltage regulation system for advanced microprocessors. Multiphase power conversion is a marked.... -
The great network of telegraph wires that once enfolded the nation like a cobweb has vanished just as surely as the spider`s handiwork is erased by a sudden sweep of the broom. " Please note that the information below is obsolete. Dial-up Morse is no longer.... -
Fairly early on in my work with high-power LEDs such the Luxeon 1 and 3 watt devices I considered that PWM (Pulse Width Modulation) techniques would be an interesting means of modulation the LED. In theory, this should be capable of producing the lowest.... -
The transformer is a 600:600 ohms transformer (also named 1:1 ratio 600 ohm transformer) : more or less the same number of turns on both primary and secondary coils, and optimized to work at 600 ohms load. Selectronic sells one here. I measured the primary.... -
R1_47K 1/4W Resistor R2_4K7 1/4W Resistor R3_22K 1/4W Resistor R4_1K 1/4W Resistor R5, R12, R13_330R 1/4W Resistors R6_1K5 1/4W Resistor R7_15K 1/4W Resistor R8_33K 1/4W Resistor R9_150K 1/4W Resistor R10_500R 1/2W Trimmer Cermet R11_39R 1/4W Resistor R14,.... -
This design circuit is shows an LM1893 power line modem circuit. This circuit is used to transfer information between remote locations by using the power mains. This circuit uses LM1893 that is used as a power line interface for half-duplex (bi-directional).... -
-
This accurate one-pulse-per-second clock is made with a few common parts and driven from a 50 or 60 Hertz mains supply but with no direct connection to it. A beep or metronome-like click and/or a visible flash, will beat the one-second time and can be useful.... -
Figure 1 exhibits the circuit with the muscular stimulator. IC 7555 is actually wired just as one astable multivibrator to build about 80Hz pulses. The particular output involving IC1 is fed to be able to transistor T1, whose emitter is actually further.... -
The on-off-type DC/ DC converter has two kinds of operating modes: One kind keeps the switch duty cycle worker constant, the controlled switch turns on time sha. Pulse length modulation PWM of n Way; Ton is constant that another kind keeps turning on time,.... -
A high quality stereo FM transmitter circuit is shown here. The circuit is based on the IC BA1404 from ROHM Semiconductors. BA1404 is a monolithic FM stereo modulator that has built in stereo modulator, FM modulator, RF amplifier circuitry. BA1404 FM.... -
This quartz crystal oscillator circuit has greater stability than a parallel resonance circuit. It generates frequencies up to 30 MHz or even higher if you use BFR91 for T1, T2 transistors and reduce R1 R2 values. The MOSFET buffer insulate the oscillator.... -
The Wien-bridge oscillator is a unique circuit because it generates an oscillatory output signal without having a sinusoidal input source. Instead, it uses capacitors with initial voltages to create the output. This circuit can be especially useful if.... -
This circuit is intended to signal through a flashing LED, the exceeding of a fixed threshold in room noise, chosen from three fixed levels, namely 50, 70 & 85 dB. Two Op-amps provide the necessary circuit gain for sounds picked-up by a miniature electret.... -
The 7815 regulatates the positive supply, and the 7915 regulates the negative supply. The transformer should have a primary rating of 240/220 volts for europe, or 120 volts for North America. The centre tapped secondary coil should be rated about 18 volts at.... -
Two cheap CMOS ICs and a few transistors was all that was required to rebuild my elderly TTL automatic morse keyer into a low current lightweight battery powered iambic morse keyer. Sometime over the past year or two, my elderly Accu-Keyer gave up the ghost.... -
Ultrasonic sound wave can be generated using electronic circuit. This simple electronic circuit can generate an ultrasonic wave with frequency range of 12 to.... -
By adding the same circuit parallel with this, you can increase the number of inputs according to the applications. Each input is connected to the inverting terminal of LM3900. The built in amplifier of each section amplifies every audio input separately and.... -
As you can see in the circuit diagram, this electronic project require few external electronic parts. The maximum output current that can be provided by this PWM current-control stepping motor driver IC is up to 1. 5 ampere. The setting conditions for the.... -
When we said to Noise signal in an audio system. everyone not likes it, wants to get rid of it all. I also not like them too. However, we can use it to get rid of it. I use transistors. Because it is easy to find. And low noise. Friends try to see the.... -
A reverse polarity protection circuit, similar to that in Figure 2 of SLVA139: Reverse Current/Battery Protection Circuits. Here is my circuit: My case is slightly more complex due to the possible input voltage ranging from 5-40V. Most MOSFETs seem to have a.... -
The Precision VXO (PVXO) and its matching Crystal Test Fixture (CTF) were created to provide a low cost means of evaluating the characteristics of crystals and a means of measuring their series resonant frequency. With this information, one can then build.... -
-
Simple to build, simple to make, nothing too complicated here. However you must use the CMOS type 555 timer designated the 7555, a normal 555 timer will not work here due to the resistor values. Also a low leakage type capacitor must be used for C1, and I.... -
This simple adapter circuit is specially intended for use with the USB Audio DAC published in this website elsewhere. With an easily implemented modification, it is possible to make the output of the D/A converter pseudo-symmetric, so that it can be.... -
Multiplexed displays are electronic displays where the entire display is not driven at one time. Instead, sub-units of the display (typically, rows or columns for a dot matrix display or individual characters for a character orientated display, occasionally.... -
The Clock Controller was designed to be an exemplary of using `C` language to control timer0 interrupt, 7-segment LED and keypad scanning. It provides 1-bit sink current driving output, for driving a relay, opto-triac, say. Many projects requiring 7-segment.... -
Condenser Microphones typically sound better than dynamic microphones. If you are unfamiliar with these two types of microphones you may want to read about them in this Wikipedia article. Electret condenser microphones have to little plates (capacitor), one.... -
A PIR sensor is triggered by itself when using a timer to wait 2 seconds after the sensor is triggered. Without using the timer to wait the sensor works as expected. I have a PIR sensor connected to an ATMega328p. The PIR sensor has three pins; VCC, GND and.... -
This tutorial is for making simplest FM transmitter using one transistor. You can make this project with less components and it is an easy and simple project for beginners. Before you proceed, please see the schematic given below. In the schematic, you will.... -
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.... -
This section gives step-by-step instructions along with photos to the construction of Ultrasonic Proximity Receiver. Because this is a very simple circuit, only a schematic for the sensor is shown here: (For the PDF format click here. ) This tutorial`s.... -
This text tries to clear out the mystery of how to get power out of PC serial power. There are quite many small circuit which take all their operating power from serial port, where there are no real power output pin. Examples for this type of circuits are PC.... -
Timer Garage Door Circuit schematic diagram, printed circuit board.. -
Here`s RF Power Amplifier for QRP with low cost. This circuit is a broadband one from 1. 8 to 30 MHz, so it is "no-tune" and you need only to regulate the quiescent current bias multiturn trimmer of each Mosfets couple. This means also low efficiency (for a.... -
Many people experienced sleeping well in natural surroundings, into a tent or a wooden hut. This fact is due not only to the healthy atmosphere but also from our unconscious ability to perceive natural Earth`s magnetic-fields. The circuit generates this type.... -
The following circuit shows an Electric Car Audio Project. Features:Rockford Fosgate Punch 4080DSM, Bridged 2 channel at 4 ohms for components., .... -
Quote: Originally Posted by rntlee The only schematic of this amp I`m aware of is this one(I got it from Song @ Canadian Hifi Online):Attachment 238521 It`s possible .... -
The memory part of my Mark 2 system is extremely simple. There are two 32K SRAM chips (actually FRAM because I had them lying around, but there isn`t any significant difference in this application). These are selected with the logical OR of the MREQ signal.... -
The range of this FM transmitter is around 100 meters at 9V DC supply. The circuit comprises three stages. The first stage is a microphone preamplifier built around BC548 transistor. The next stage is a VHF oscillator wired around another BC548. (BC series.... -
This simple wind Charger circuit electronic project is designed using the LTC1042 monolithic CMOS window comparator, manufactured by Linear Technology. This Wind charger circuit electronic project use the wind power to produce the energy required to charge.... -
This 8 function serial Christmas lamp controller is based on the IC UTC 8156 from Unisonic. Specially designed for the same purpose, the UTC 8156 can control the four lamps in 8 modes namely waves, sequential, slo-gol, chasing/flash, slow fade,.... -
Decoder Tags: PT2262, PT2272, Remote Control, RF-RX-315, RF-TX-315 Remote Control 315MHz by using RF remote control Encoder and Decoder Published by: cl.chin on September 3, 2012. 48 Share Tweet 3 Share Share Introduction RF-TX-315 & RF-RX-315 RF Modules....
