Top Circuits Page 69

As shown for the brightness display circuit. The circuit consists of light-sensitive sensor, an oscillation circuit, LED display circuit. Wherein the light-sensitive..

Door circuit logic pen text display can take many forms, either by the inverters can also be used with non-gates, NOR gates, etc. can also be used. A logical pen as shown by th..

Digital timers with a display clear and precise features. It is a number that represents the time after the pulse signal by decoding the digital device with digital display tub..

Digital display clock signal source circuit shown in the figure is taken from a multi-point detection control box in the actual circuit. It mainly consists of automatic and man..

Digital display temperature detection circuit Precision digital display shows the temperature detection control circuit, MC1403 pin output reference voltage, the potentiometer ..

Display circuit as shown in a typical digital massager. The core of the control circuit is a microprocessor EM78156, it then received instructions manual operation of the circu..

It shows using ICL7106 / ICL7107 chip liquid crystal display circuit. In this circuit, ICL7106 / 7107 is a signal measurement and A / D converter circuit, an analog input signal by detecting it, amplified to the digital display circuit, the result of the....

Provided only manual recording level control function, when the circuit is in the recording mode, the recording level as LM3915N was shown...

It shows the dynamic AC signal level display drive circuit can be used for audio level display driver...

Light-emitting diodes can be used DC, AC and pulse and other drivers, resistance typical buck LED display circuit as shown in Figure 13-1...

Condenser microphone pickup signal broken by Iq. amplified and sent as a comparator HJ of lC.., - LC.., And lC: (e - b) each of the negative side, the positive terminal of the ..

Shows - typical of six dynamic display circuit. In the figure, the PA 8255 end date display output code. PB port output bit election code. Let the display buffer is DISBUF, then complete..

Is the use of LM324 as a band-pass filter, LB1405 for five-band spectrum display drive display circuit. Point 3 is selected frequency harmonic relationship, their center frequency is 100Hz, 330Hz, lkHz, 3.3kHz, 10kHzo band-pass filter is 0 = IO.KF = o 20 cases..

3 shows two kinds of digital display circuit, Total (a) adopt common anode circuit configuration, FIG. (B) the use of common cathode path structure...

6 shows the static display circuit. Figure, 74LS244 as bus drivers, six figures show a public bus, each with an LED display martyrdom latch (such as 74LS273) connected to the code for latching display data to be displayed. Data is displayed on behalf of..

A typical liquid crystal display inverter circuit (OZ965) It shows a typical liquid crystal display of the inverter circuit, which is mainly controlled by the 02965 chip, the d..

Another common single five lamp drive circuit is: LB1416/26/36, the circuit is a double row of finned-line 14 pin package. Its interior has two input amplifier and five voltage..

Any power supply and distribution sector should phase sequence detection Huan Jj means to ensure stable power supply phase sequence unchanged. Any irreversible electromechanica..

As shown by the multivibrator flashing light emitting diode display driver circuit can be used in toys in the eyes of animals or monsters double eyes flash. ..

As shown in the external audio spectrum display circuit, high-end audio equipment are generally audio spectrum display apparatus can keep abreast of both instantaneous playback..

BA6104 Five-digit LED level meter level LED display driver IC circuit constituted as shown in FIG. BA6104 10 by two-dot LED level display circuit configuration shown in Figure ..

Color light-emitting diodes with different colors of light can indicate the operating electrical equipment status, electrical equipment status indication line as shown in FIG. ..

Colour in teaching, in order to allow students to understand the principle of color TV color synthesis. This circuit can be beneficial to use visual teaching, realistic reprodu..

Two circuits of audio tubes amplifiers...

300B tube single-ended Class A amplifier circuit is as follows: ..

2W resistors can be used around a metal or carbon film resistors fortunate optional paper referred capacitors, polypropylene capacitors, voltage of 400V on the nozzle; capacito..

Danji mellow, transparent, natural sound, sweet, sincere, tireless listening to long, full of humane color. In building a harmonious and beautiful life, tube amps have become a..

DC-coupled single-tube amplifier (l) single-tube coupling the DC amplifier so-called single-tube DC-coupled amplifier circuit means only consist of a transistor, the basic comm..

Figure 1 shows distortion variations in red and violet. Notice how the violet wave follows the green wave perfectly during its positive excursion but falls short of the mark during the negative swing. The red wave is more symmetrical, but does not "clip"....

This project is finalized, that means it is no longer experimental. This amplifier, altough limited in output power (20W), has been designed to give the best listening pleasure. No compromise has been made during components choice: the 845 output triode is....

Pure A class is the most simple topology for designing an amplifier! The tube or the power transistor is loaded directly by the speaker (often thru a transformer, fro impedance matching!), and is biaised at the current necessary for full modulation (that....

The circuit is simple, yet is capable of excellent performance. I designed it specifically for use as an amplifier for the digital sound card in my computer. Audio input can be from any two-channel line level device such as a television, CD player, or VCR.....

The unit is powered directly from the 120 volt AC line, with no power transformers. Filaments are wired in series, with the total adding up to 117 volts (35 + 35 + 35 + 12). The 35W4 forms a half-wave rectifier, which is filtered by a three-stage RC network.....

With all DHT stages (all tubes from Svetlana 1970-s). OK, the input/splitter are not DHT`s but DHP`s - 4P1L - triode wired. Mullard 3-tube input/splitter topology, cap-coupled to cathode bias 6B4G PP. First stage uses battery bias (no cathode resistor). Only....

Here are photos of a tube unit including an analog multiplier, phase discriminator and a relay control driver (a big relay was inserted in a socket near two potentiometers on the left). Used in ground control gear (don`t ask me - control of what..., all I....

Vacuum Tubes 807 and 1625 are commonly used by hams as power amplifiers. Both tubes are audio power amplifier beam tetrodes in the output stage of high power amplifiers but they are suitable for high frequencies also. Both tubes are equal in their....

Depending on the input impedance can be divided into a high-impedance input and low impedance input in two ways. Its major input in various audio equipment to the requirements ..

A very good circuit of pre-preamplifier, for amplification of signals from heads of Moving Coil. It uses the two departments of tube ECC88, association parallel, for reduction of produced noise. The circuit enters in line with existing circuit PHONO.....

The schematic shows a valve / tube audio power amplifier and a type 390 Rectron B eliminator...

..

A cathode follower based on the 6BL7 or 6BX7 is ideal for output. I used a mu-follower circuit with no feedback, a 12SN7 as the gain stage, and a 6BL7 as the cathode follower/current source. (I have many old GEs I wanted to use, and converting to 6SN7 means....

For SR AB763 driver replace: 25k pot, 0.1uF cap and 4k7 resistor with 100 ohm resistor to ground. 56k resistor with 820 to 4k7 resistor. ..

Blue VALUES replaced by values in RED. Blue COMPONENTS removed from circuit. Red components added to circuit...

Preamplifier VE1 the machine with low muscle low R double triode 6N6 (left and right audio channels each with its half). Working state design in the CPI. Promote ..

Composite pipe can be reduced to promote the adjustment of the control current of the tube. ..

FIG. 2A3A low direct thermal resistance transistor, its resistance is only 800, so the output transformer primary screen to screen to load impedance 3.5k Cong. Push-pull amplif..

FET used as a silencer tube headphone circuit Field-effect transistor is shown as a headphone circuit silencer tube. L from the digital signal processing circuit, R audio signa..

Examples of the structure of a number of liquid crystal display drive circuit CPU tubes. ..

1000 m single-tube FM transmitter circuit diagram of oscillation: ..

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..

Electrical properties of the tube with good quality output transformer has a great relationship, it is well known thing. Overseas equipment commodities have simply cancel the s..

Display tube using a constant current circuit for steady flow tube ..

Circuit shown in Figure. Higher technical specifications of the circuit, is a very good OTL amplifier circuit. The frequency response of the..

The following diagram shows an output power of radio 1OOmW common OTL amplifier circuit. The circuit output transformer, and a capacitor together with the speaker units. Frequency characteristics OTL amplifier ..

Ml00 circuit from the point of view, it is a typical tube circuit. It's preamp, input-stage amplifier stage are Cape through common cathode amplifier TAIL inverter stage, the last stage power..

Standard linear amplifier according to the standard connection conventional circuit configuration, the power of the beam tube tube according to Figure 1-8, the river. The output stage uses power tubes EL34, KT88. KT100 and other radio beam tetrode,..

Transistor radio shows common OTL power amplifier circuit, VT5 bias resistor driver stage. VT6 and VT7 is a pair of complementary symmetry tube. VT6 germanium material NPN transistor, VT7 is germanium PNP transistor. VT6, VT7 and the biasing resistor..

6N5P the output impedance of 400 ohms low resistance tube used as a parallel push-pull, the output impedance of a single tube half, and then two-three-plate and pipe used in pa..

After the original radio with guts shown transformed into a block diagram of the machine. Electrical schematic shown in Figure 1-27, which is a typical type of tube Group A sin..

As a result of high quality materials and advanced technology, the machine output transformer frequency response can reach 10Hz (a 0.8dB) ~ 50Hz (a ldB), to improve the overall..

As can be seen from the figure, the self-generated bias amplifier tube for each tube separately to reduce the demanding amateur conditions paired amplifiers camp. Pre-alone DC ..

As of control type delay circuit discharge Discharge delay circuit and a delay circuit rechargeable compared Discharge delay circuit can obtain a longer delay, and the delay is..

As shown in FIG grounds TDA6103Q and color picture tube composed of the actual application. R, G, B input signal from the input socket X3, through the input resistor network co..

As shown in a practical single-tube constant current charger, which play a constant role transistor VT1, its current value is determined by the voltage regulator and R2. Genera..

As shown in the circuit diagram of the feeding tube Swallow CS37-2 type color TV. Filament voltage by the line flyback transformer, winding current limiting resistor R523 is su..

Balanced cross tube inverter circuit is also known Chelles inverter circuit, it can be used as a preamp and 6N10,611 inverted. With the final amplifier tube amplifier using 300..

Characteristics of the transistor 811A to the right, when this type of pipe work there is gate current generating means, in order to effectively discharge grid current, convent..

Circuit characteristics: O simple phase shift range 180. ; good linearity, control accuracy than the first two, and is suitable for low voltage, but less demanding electroplati..

CMOS gate has a high input impedance, resistance by human contact, you can make it the input level is changed, triggering gates toggled. ..

DW10M de-excitation type switch is based on the DW10 automatic air circuit breaker on the normally open to normally closed contact is made. (1) DW10M-200,400, 600 de-excitation..

DW16M-630 type excitation switch operation with DC power and AC power operation of the two, the former circuit is shown in 7-60 J, the latter circuit shown in Figure 7-61: figu..

This circuit will provide an indication whenever the input voltage differs from two defined limits, V1 and V2. The supply voltage, Vcc must be higher than the highest input voltage by at least 2 volts. One application here is to monitor a 12V car battery. V1....

A microcontroller implements the proper protective action when one of the temperature monitors detects an overtemperature condition. It is sometimes easier and more cost-effective to simply disconnect the offending circuit from the power supply without....

A touch switch is a switch that is turned on and off by touching a wire contact, instead of flicking a lever like a regular switch. Touch switches have no mechanical parts to wear out, so they last a lot longer than regular switches. Touch switches can be....

The whistle switch allows you to turn on, or off, an appliance by whistling at it. I originally built the whistle switch in 1974. Do not attempt to duplicate it from the schematic below, but instead, understand the functions and duplicate these functions....

The old and omnipresent NE555 can be very good at something it was not meant for: driving relays or other loads up to 200 mA. The picture shows an example circuit: if the input level rises over 2/3 of the supply voltage - it will turn on the relay, and the....

The circuit in Figure 1 provides a safety interlock that checks the actuation of two pushbuttons before enabling a relay. When you push both buttons, the circuit actuates the relay. At that point, you can release one of the switches without the relay`s....

These circuits allow an ON-ON type DPDT toggle switch to control a twin coil switch machine motor. The handle of switch can then be used to indicate the route selected. The circuits are also able to control LEDs that could be used to indicate the selected....

The circuit in Figure 1 produces a single debounced pulse each time you press S1. Moreover, the circuit uses only logic power from the remote pull-up resistor, R2. You can use the circuit to detect when a key is pressed in a nonenergized device, such as a....

The control of electronic potentiometers in most today`s applications comes from controller-generated signals. However, a significant number of applications exist that require adjustments using manual, front-panel controls. The circuit in Figure 1 uses one....

Traditional control-system designs use separate switches to control power and various system functions, but adding a few components to a small, microprocessor-based system can combine a control function with the system`s on/off switch. For example, you can....

The cost-effective design in Figure 1 provides control for CMOS switches without the need for an external power supply. Analog switches such as those in the MAX4663 are ideal for use in low-distortion applications. They are preferable to electromechanical....

The circuit in Figure 1 can intelligently control ac or dc current when connected in series with a load. The circuit "steals" its power by turning off the load at a low duty cycle. The switch uses the MOSFETs` parasitic body diode to its advantage. While the....

The idea is simply to turn off the negative voltage load. Some examples:- - Bias votlages for LCD panels - RF Amplifiers - Audio Amplifiers The good thing about this design is that i can make use of the system i/o voltage to control the on/off and this....

Sometimes, you need to remotely turn on or off a two-state system, such as a light, from multiple points. You could connect simple pushbutton switches in parallel to a single-line bus. However, if the bus simply controls a toggle flip-flop, the system must....

The alarm will switch off when the 4 keys connected to "A,B,C,D" are pushed in the right order.The circuit works because each gate `Stands` upon its predecessor.If any key other than the correct key is pushed, then gate 1 is knocked out of the stack, and the....

This circuit was submitted by Adam from Canada who is still at school. I have provided the text. The two transistors are used as a direct coupled switch, Adam used 2SC711 but any general purpose transistor will do e.g. 2N3904, BC109C...

This Design Idea offers a solution to the challenge of turning devices on or off in the past. In Figure 1, IC2 is a 555-type timer (preferably CMOS) connected as a monostable one-shot multivibrator. The pushbutton switch, S1, triggers IC2. You can replace....

Driving the highway with your high-beam headlights can really increase your visibility, but can be a blinding hazard for other drivers. This simple circuit can be wired into your headlight switch to provide automatic switching between high and low beam....

When you need to quickly connect a negative power supply under logic control, the negative power-side switch in Figure 1 can help. Although originally intended for driving the gates of high-current MOSFETs, the MIC4451 can assume a different role. It....

The circuit in Figure 1 adds a soft muting switch with power-up/power-down muting to a line-level audio circuit. R4, C1, and JFET Q1 quietly ground a signal in 100 to 200 msec when you close S1 or release it when you open S1. Potentiometer R2, set to twice....

The problem of setting any one of four modes of a µC-operated process has a straightforward solution: Have the µC check the states of some 4 bits of a µC register or an input port and then execute one of the four predetermined subroutines according to the....

Linear Technologys LT®3466 is a dual step-up converter capable of driving up to 20 white LEDs with a programmable constant current. The device is also capable of driving asymmetric LED strings with independent dimming and shutdown control for multipanel....

The circuit in Figure 1 is a keypad interface that solves this problem by using an ultralow-power microcontroller. The circuit typically consumes 100 nA while awaiting a key press and consumes a maximum of only 2 µA if all keys are stuck or held down. An....

This circuit is used to trigger a camera`s electronic shutter circuit when a flash of lightning is present. This circuit would also work for photographing fireworks displays or other events involving flashes of light...

As systems grow smaller, it becomes increasingly attractive to replace mechanical potentiometers with electronic potentiometers, which are smaller and less expensive silicon equivalents. A common interface for such devices comprises a Chip-Select, Increment....

The dual-channel PCA9540 I2C multiplexer often breaks up an I2C or SM bus or allows you to use devices with the same addresses on the same bus. When the PCA9540 initially powers up, it comes up in a state in which both channels are deselected. The I2C- or....

The circuit lowers this dissipation after actuation by applying less than the normal 5V operating voltage. Note that the voltage required to turn a relay on the pickup voltage is greater than the pickup voltage required to keep in on the dropout voltage. The....

Typical circuit representative of those used in most light switch type digital timers. The timer module is normally a PIC or custom chip, and it syncs to the AC line so that a trigger pulse can be supplied at the right moment...

In an effort to conserve energy, simple shutdown schemes are incorporated into many battery-operated circuits. Not all circuits lend themselves to direct control, however, and instead the supply must be turned off by a switch. The LTC®1477 high side....