DOUBLE VARIABLE TIMER FOR MOTORS

TODAY WE WILL MAKE A TIME MOTOR CONTROL SYSTEM, THAT IS, A MONOSTABLE BUT DOUBLE CIRCUIT FOR 2 MOTOR CONTROLS

GERBER PCB:

https://mega.nz/file/aRAUwKKB#hxco6ObedaYGLdWVcxRbSsfrnVD4y1qaLWK5pg33HHI

Here we will see the schematic diagram made in the easyeda software with all the electronic components and their respective values.

MONOSTABLE.

The monostable is a multivibrator circuit that performs a sequential function consisting in that when it receives an external excitation, it changes state and remains in it for a period that is determined by a time constant. After this period of time, the output of the monostable returns to its original state. Therefore, it has a steady state (hence its name) and a quasi-steady state.

Integrated monostables are found in various logic families, both TTL (9601, 74121 and others) and CMOS (4047, 4528, ...). They are circuits that comprise an analog part, which is the generation of the pulse, and a digital part, which provides various logic functions between the digital inputs and outputs.

The timing accuracy depends on the analog part, which usually consists of a current generator charging a capacitor C (external) and a voltage comparator. Many times the current generator is only a resistor R (external or internal) connected to Vcc. Pulse duration is a function of HR, although the exact dependency depends on the model. Then, the tolerances of R and C appear directly as errors in the pulse duration, as well as their variations with temperature. It is also the part most sensitive to noise.

The digital part adds different features, producing different types of monostables:

Resettable or resettable: A reset input allows the pulse to be interrupted at any time, leaving the device ready for a new shot.

Retriggerable (retriggerable): Allows you to restart the pulse with a new shot before completing the timing. Let's say that there is a 4 ms timer, but 2 ms after the start of the pulse a new shot is made; the duration obtained is 2 + 4 = 6 ms. Non-retriggerable monostables only allow tripping when there is no timing in progress. That is, in the example above, you would ignore the second trigger and only get a 4 ms pulse.

Monostable-Multivibrator: They are double monostables (two, normally independent) in the same capsule that allow their connection so that the end of the pulse generated by one of them triggers the other. They allow precise and independent control of the high and low times of the output signal.

For long timings, counters are added to a multivibrator that lengthen the duration of the pulse

• VIN 24VDC
• I MAX 100mA
• DOUBLE CONTROL OF INDEPENDENT TIMES
• TIME CONTROL UP TO 2 MINUTES
• OUTPUT CONTROL UP TO 2 DC 24V MOTORS

This project was made in the Easyeda software as we can see the tracks and the 3D image of the project working perfectly are no difficulty

PCBWAY has 10 years in the electronics industry manufacturing professional PCBs, assembling PCBs managing to satisfy the demands of all parts of the world, in addition to meeting the highest quality and delivery time standards. PCBWAY allows the manufacture of your PCBs from 5 units.

This project was carried out thanks to PCBWAY, a company dedicated to the manufacture of prototypes and professional PCBs, in addition to offering you a ready assembly service with all the components in your PCBS, complying with the established quality and delivery time standards.

We thank PCBWAY, a leading company for manufacturing and assembling professional PCBs with the highest quality, PCBWAY has fair reasonable prices, punctual shipping time and 24-hour customer service, it also offers you the option of quoting all its services in his web page. Do not think twice and start manufacturing your professional PCBs from 5 units safely.

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We thank PCBWAY for the professional pcb they provide us for this project.

GERBER PCB:

https://mega.nz/file/aRAUwKKB#hxco6ObedaYGLdWVcxRbSsfrnVD4y1qaLWK5pg33HHI