A small oled display is also used to show the date and time on the control box.
Wall clock stepper motor.
For the time being ignore the section of the schematic labeled ir circuitry.
To adjust the timekeeping you might have to tweak the delay time a little according to the motor variability.
The stepper motor 28byi 48 is driven by a small controller board uln2003.
For those familiar with arduino programming and shields you can find help programming stepper motors here.
Include hands quartz diy wall clock movement mechanism battery operated diy repair parts replacement.
In that project a microcontroller nxp lpc845 arm cortex m0 is driving 8 stepper motors one clock uses two motors each individually controlled.
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The only changes necessary in the stepper motor control files is to change the delay time in the loop function.
Although the stepper claimed to have a 1 64 reduction gear the actual ratio wasn t that precise.
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Owing to bad stepper mode specs the original version of the clock was gaining time overnight.
You can drive a clock with a stepping motor prank to somebody.
Clock component running by stepping motor.
For the minute motor start with a delay of about 1800 and for the hour motor use a delay of about 21600.
The 28byj48 produces 32 steps per full motor revolution.
Stepping motor is 2 phase ac generator.
Finally 6 push buttons can be used to adjust the rtc and run the mechanical clock fast forward or fast reverse.
Its output shaft is geared to yield 512 or 513 depending on source steps per revolution.
Using a serial connection the clock can be configured.
My clock uses two 28byj48 steppers to turn its minute and hour hands.