The suggested motor toy circuit which functions an automatic forward reverse actuation employing a sequential delay timer circuit could be visualized in this article diagram:
motor timer with reverse forward circuit for toys
Making reference to the above diagram, the T1, T2 stage together with the connected parts form an astable multivibtator with an oscillator frequency period in accordance with the preferred motor reverse forward timing period.
The TIP127 phase is the latch circuit for allowing a push button start for the circuit.
The IC 4017 implements the forward and the backward pulses for the transistor driver phase consisting of Q1-----Q4.
The transistor driver is designed as a H-bridge for supporting the reverse forward motion of the motor due to the causes provided by the IC 4017 outputs.
The circuit may be recognized with the aid of the following reason:
Whenever the push button is pressed briefly, T3 acquires a short ground pulse by means of the switch which is associated with the transistor turning it ON and providing an optimistic pulse to the circuit.
The initialization trigger brings about a logic low to emerge at pin4 of the IC 4017 which holds and latches T3 into a strong ON position even though the push button is introduced.
At the same time pin15 also acquires a positive pulse resetting the IC such that pin3 starts with a logic high.
With pin3 initially high actuates the H-bridge along with the motor in a particular direction relying upon the polarity of the motor wires across the bridge network.
Now T1 and T2 starts counting and the moment their set time lapses, pin14 acquires a triggering pulse from the collector of T2 which forces pin3 high logic to shift to pin2.
The above condition immediately reverts the H-bridge polarity and leads to the motor to start an opposite course of its motion, until the subsequent pulse at pin14 of the IC occurs.
From the moment the subsequent pulse is felt at pin14 of the IC 4017, the high logic at pin2 of the IC now moves a step ahead and settles at pin4 of the IC.
In spite of this due to the fact pin4 is connected with T3, a high at this pin instantly switches OFF T3, accordingly breaking the latch and switching OFF the power to the whole circuit.
The toy motor circuit now completely switches OFF until the push button is pressed again.
A 0.1uF capacitor ought to be linked in identical with R2 to ensure that at any moment power is turned on T2 generates ON first and allows an appropriate implementation of the system with regards to the set time intervals.
The time intervals may be set or adjusted according to user selection by altering the values of both R2/R3 or C1/C2 or both these pairs.
Even though the circuit is applied as a toy here, it might possess a lot of fascinating industrial functions which enables you to be modified for performing a number of user stipulated programmed machine activations.
motor timer with reverse forward circuit for toys
Making reference to the above diagram, the T1, T2 stage together with the connected parts form an astable multivibtator with an oscillator frequency period in accordance with the preferred motor reverse forward timing period.
The TIP127 phase is the latch circuit for allowing a push button start for the circuit.
The IC 4017 implements the forward and the backward pulses for the transistor driver phase consisting of Q1-----Q4.
The transistor driver is designed as a H-bridge for supporting the reverse forward motion of the motor due to the causes provided by the IC 4017 outputs.
The circuit may be recognized with the aid of the following reason:
Whenever the push button is pressed briefly, T3 acquires a short ground pulse by means of the switch which is associated with the transistor turning it ON and providing an optimistic pulse to the circuit.
The initialization trigger brings about a logic low to emerge at pin4 of the IC 4017 which holds and latches T3 into a strong ON position even though the push button is introduced.
At the same time pin15 also acquires a positive pulse resetting the IC such that pin3 starts with a logic high.
With pin3 initially high actuates the H-bridge along with the motor in a particular direction relying upon the polarity of the motor wires across the bridge network.
Now T1 and T2 starts counting and the moment their set time lapses, pin14 acquires a triggering pulse from the collector of T2 which forces pin3 high logic to shift to pin2.
The above condition immediately reverts the H-bridge polarity and leads to the motor to start an opposite course of its motion, until the subsequent pulse at pin14 of the IC occurs.
From the moment the subsequent pulse is felt at pin14 of the IC 4017, the high logic at pin2 of the IC now moves a step ahead and settles at pin4 of the IC.
In spite of this due to the fact pin4 is connected with T3, a high at this pin instantly switches OFF T3, accordingly breaking the latch and switching OFF the power to the whole circuit.
The toy motor circuit now completely switches OFF until the push button is pressed again.
A 0.1uF capacitor ought to be linked in identical with R2 to ensure that at any moment power is turned on T2 generates ON first and allows an appropriate implementation of the system with regards to the set time intervals.
The time intervals may be set or adjusted according to user selection by altering the values of both R2/R3 or C1/C2 or both these pairs.
Even though the circuit is applied as a toy here, it might possess a lot of fascinating industrial functions which enables you to be modified for performing a number of user stipulated programmed machine activations.
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