Counter Circuits
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This small device, intended primarily for modellers, allows an instant reading of the time I of a pulse in ms. It can, for example, measure the position of the servomotors, about 1 to about 2 ms, or make repetitive or non-pulsed measurements, such as closing.... -
Corridor counter delay circuit for controlling lights This circuit is tested and functionable. When the circuit is energized, the 555 oscillator starts to oscillate, CC40161 is.. -
Electronic calculator with automatic counting of the interface circuit shown in Figure. Figure (a) stroke switch so via optocoupler B control; Fig. (B) the use of reed KR and p.. -
Digital counter circuit as shown is composed of infrared signal for detection of moving target scan count small device, it is suitable for the production line, to move items on.. -
U2 is a decade counter /divider, Ul is used as a switch debouncer. For a self-generating system, connect a resisor.. -
This circuit is representative of the many applications of up/down counting in monitoring dimensional position. In the tape recorder application, the LOAD REGISTER, EQUAL, and ZERO outputs are used to control the recorder. To make the recorder stop at a.... -
One can transform an ordinary binary counter, such as a 7493, into an up/down counter with mode control by adding XOR gates 7486 to the counter"s outputs. The circuit counts up when the DN/UP line is low and down when the DN/UP line is high. To use the.... -
This circuit symmetrically divides an input by virtually any odd number. The circuit contains n + 1h clocks tw.. -
This circuit produces a symmetrical waveform when dividing by either 2 or 3. The Divide Select input controls the .. -
This circuit, instead of dividing by an integer, divides the input signal by +1/2. With the feedback connections .. -
The shift pulse turns off the conducting scs by reverse biasing the cathode gate. The charge stored on the coupling capacitor then triggers the next stage. An excessively long shift pulse charges up all the capacitors, turning off all stages. .. -
A straightforward circuit using a LM311 for the level detector and a CMOS analog gate to discharge the capacitor is shown. An important property of this type of counter is the ease with which the count can be changed; it is only necessary to change the.... -
The display shows each increment. By using mode 2, external debouncing of the gate switch is unnecessary, provided the switch bounce is less than 35ms. The 3 V lithium battery can be replaced without disturbing operation if a suitable capacitor is connected.... -
Display counter circuit Explanation Here is a circuit diagram of a seven-segment on the counter IC CD 4033... -
8 shows a possible digital counter circuit. This circuit uses two ICM7217 integrated chips each control four digital tube. .. -
As shown, a CD4016 analog instrument is used here as a multiple multiplexed digital output, these output transfer function back to the input. Since the CD4016 is a digitally co.. -
As shown, this simple circuit using a LM311 in the level detector, and with a CMOS analog switches to release capacitance. A major feature of this counter is the number can be .. -
Asynchronous counter shown, this circuit no clock synchronization signal can be used in a random counter or independent unit circuit. .. -
CC4017 count/distributor consisting of a circuit diagram of the delay: .. -
Circuit order is triggered by the positive edge. The anode of the triac switches are turned on, the cathode of the switches are closed. Male - female IN4009 positive transient .. -
The circuit that has been used is shown in picture 1. Through the experimental part we will explain each of the parts function, but in order to have a notion of the basic idea, let just say, that this circuit besides the 5V power supply, is fed with a pulse.... -
This simple counter is useful for frequency measurements of various wireless equipments, especially transmitters, receivers and signal generators in VHF/UHF band... -
The High Speed Function Generator was published in the professional electronics section of the Aug 1996 issue of Electronics Australia, and has proven to be extremely popular. The kit is no longer available from any of the kit suppliers... -
This little circuit will help you to scan the line of a 220V live wire in the wall. The FET gate is connected to a capacitive metal sensor (which is usually a simple metal plate). When you hold the sensor close to the wall, the LED will indicate the current.... -
This 3 channel 15 LED spectrum analyzer is the perfect addition to any audio amp project. It produces fantastic displays on three LED bars that can be individually adjusted for any particular frequency range. The circuit will take line level output from most.... -
Use this circuit to test if the light coming from your 40khz IR emitter is really emitting the right frequency. The schematic says to use a GP1U5X ir module, but probably any 40khz detector module will work.. I used a GP1U26X module... -
The standard circuit will display directly in Hz (1MHz max), and there is a seperate on board divider that will allow you to display directly in KHz (approx 40MHz max). Becuase the display reads directly in Hz or KHz there is no need for decimal point.... -
The original application for the circuit in Figure 1 was to check the number of revolutions of an engine with only one LED as an indicator. The measurement of the number of revolutions usually involves sensors with a frequency output proportional to the.... -
Plumbing a laboratory with a standard frequency makes a lot of sense if the lab uses multiple frequency counters, spectrum analyzers, and other frequency-dependent test equipment. Rather than spending time keeping all of the instruments` oscillators in....
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Using a modern multimeter to measure current can sometimes be difficult. Many of these meters will only measure up to one amp. However, may 112-volt DC powered projects draw a lot more than that. If you have ever thought of purchasing a commercial shunt to.... -
By combining the responses of an Analog Devices (www.analog.com) AD590 temperature sensor and a Humirel (www.humirel.com) HS1101 humidity sensor, you can generate a single TTL-level signal containing information from both sensors (Figure 1). This design uses....
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The compact and low-power temperature-to-frequency converter in Figure 1 is ideally suited for measuring temperature in remote locations. An AD22100A temperature sensor generates a voltage proportional to the ambient temperature. This voltage then drives an....
New Circuits
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This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of.... -
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.... -
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.... -
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.... -
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.... -
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,.... -
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.... -
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.... -
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.....
Popular Circuits
A flashing LED signals the necessity to water a plant Very low current consumption - 3V powered...
C ircuit of a new type of remote control switch is described here. This circuit functions with...
The 4047 is configured as a free-running, astable- multivibrator (oscillator) circuit. That...
The SillOO series circuit input is connected to a capacitive field sensor-possibly a piece of...
This TMOS VCO operates in push-pull to produce 4 Wot 70 MHz. It consists of two MFE930 TMOS...
This project has been developed together with some other OMs (in particular Marco IW1DGG) in our...
Here is a circuit of a LED sequencer / chaser using CD 4017 and NE555 IC. CD 4017 is a CMOS...
Colpitts oscillator. Its frequency depends on the capacitance of the vary cap diode. The center...
Version V2. 9 supports also GPS-receiver with ANTARIS chipset and simultaneously using of...
Although it does not have the same charm as real mercury barometers with long glass tubes on...
Light onphototransistorQ1 (Radio Shack 276-130) produces voltage change across R2 for...
Circuit is shown, which consists of a DC voltage regulator circuit, the delay circuit,...
Electric thermos temperature detection control circuit Electric thermos shows the temperature...