For correctly using the 555 time-base circuit, we should know about its main parameters. The TTL type and CMOS type 555 time-base circuits have differe...
555 timer circuits This door minder electronic project is based on a 555 timer circuit and uses an IR beam to monitor door and passage-ways or any othe...
The No.1 Cluster and Warning Lamp Circuit of the Dong Feng Yue Da KIA-Qianlima Car...
As shown on the figure 4-10, the 555 is the core of this circuit. It uses the 555's 6 foot to contact the comparator A1's in-phase and inverted input o...
There are a few 555 timer design software applications that will help you in your projects. Component value calculations for the 555 take into account ...
As shown in the figure 3-9, the vibrator circuit consists of anA/D converter, mirror current source, and a 555 oscillator. The scillation frequency is ...
This article describes the Ultimate 555 timer Design (NE555N). The content is very simple, very helpful. Components in this article can help you unders...
555 timer circuits This tachometer circuit is designed using a 555 timer circuit and common electronic components. An electrical signal taken from the ...
The monostable timing circuit is composed of time base circuit 555 and R1, C1. When the power supply switch SA1, SA2 are connected, C1 is charged by R1...
As shown in the figure 5-13, the astable multivibrator is composed of IC1, Rp1, R6 and C3, and f=1.44/(RP1+2R5)C3. Oscillation frequency of the paramet...
The Vc1 increases linearly when the pull-up resistor RA in the monostable circuit is replaced with constant current source, generating a linear ramp. T...
Band stop filter is a kind of band-stop filter with high Q value (referring to the narrow bandwidth). They are designed to filter out a single frequenc...
As shown in the figure 11-30, the answering device circuit contains 20-way answering device switch and relevant relay control circuit, combined display...
Using the Output of a 555 Timer The output (Pin 3) of the 555 can be in one of two states at any time, which means it is a digital output. It can be co...
In the figure is the sawtooth wave generating circuit of 555. The circuit is a audio sawtooth wave generator which is irrelevant to temperature, whose ...
Screws commonly used in exterior of lighting to adjust headlamp beam, which is very inconvenient. Japan's Lexus sedan (E5300, Lexus LS400) and the Land...
This article briefly describes the 555 Timer Circuit With Variable On / Off Times (1N914). This principle is easy to understand, but also very practica...
This article describes the The 555 Timer Design (NE555N). The content is very simple, very helpful. Components in this article can help you understand ...
The voltage-controlled oscillation circuit has been shown in picture3-19. 555, R1, R2, C1~C3 and VT1 constitute a voltage-controlled multi-vibrator. As...
A schematic diagram of a touch switch circuit is shown below. This circuit consist of timer, one shoot multivibrator and touch terminal. As timer, this...
You can start to set yourSquare Wave Generatorupusing 555 timer ICthrough the circuit shown above. Find it match with the pinout of 555 timer IC. The o...
The chart shows the multi-function refrigerator controller. The controller consists of over voltage, under voltage sampling circuit, delay-start circui...
As shown on the figure 8-42, this circuit is the timing and audio circuit parts of the monitoring device model. It includes 15s~20s periodic pulse wave...
Figure 1 This mini metronome gives a linear scaled output and 40 to 208 beats per minute. 1- Q1 and Q2 transistors provide linear frequency variation o...
Voltage-to-frequency converter (VFC)? circuit is shown in the schematic diagram below. The circuit employs 555 IC as the core of its function. This cir...
As shown in picture 3-11, this oscillator constitutes an astable multi-vibrator along with a 555, R1, R3, C1 and a photosensitive audion, and its oscil...
Description The two circuits below illustrate using the 555 timer to close a relay for a predetermined amount of time by pressing a momentary N/O push ...
Generating sawtooth wave signal can be implemented using several ways, and one of the very popular method is by using constant current source to charge...
Pressing the starting button QA, 12V voltage is added to IC1, IC2, J1 pulls in, the starting ring makes a sound. Once it is added +12V, IC1 is set, whe...
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