Hi,
I was looking to connect a motor to an alarm clock so that it would start and stop at a certain time.
I found this thread, which was very helpful, on this site: https://forum.allaboutcircuits.com/threads/replace-speaker-of-alarm-clock-with-dc-motor.101453/. It discusses how to do just that, replace the speaker of an alarm clock with a dc motor.
I didn't want to go into an alarm clock and try to work with the internal components, since I am pretty inexperienced, so instead I bought an alarm clock that has an external vibration disk. The disk is meant to go beneath your bed or pillow and shake to wake you up. It connects to the alarm clock via a detachable cord. Anyways, I thought that instead of going into the clock I could just use this external wire to pretty much do the same thing.
Here is a link to the product for reference:
https://www.amazon.com/dp/B000OOWZUK/ref=cm_sw_em_r_mt_dp_F0CJBA2E2CHGQTVT6GFP?_encoding=UTF8&psc=1
I cut off the vibration disk and stripped the wire. I measured the current with a multimeter, and found that the voltage running through the wires jumped around from 0 to 5 to 8 or 9 volts as the alarm went off.
This differed significantly from the voltage discussed in the previous thread, which was a 1.5 volt alarm clock, with the current running to the speakers only going up to 0.8 max.
Currently, I am trying to create the circuit design created in the thread mentioned previously, which to my knowledge was thought up by @Rich2 and drawn up by @absf . However, I wanted to hold off on ordering components until I found out if the design would need to be modified in any way as a result of the higher voltage.
Here is the design. As I understand it, the general idea behind the design is to sense if a current is being sent, and if it is, to activate a second circuit, which has its own battery power source, thus solving the issue of fluctuating or incompatible power coming from the alarm.
Thanks in advance for your help!
I was looking to connect a motor to an alarm clock so that it would start and stop at a certain time.
I found this thread, which was very helpful, on this site: https://forum.allaboutcircuits.com/threads/replace-speaker-of-alarm-clock-with-dc-motor.101453/. It discusses how to do just that, replace the speaker of an alarm clock with a dc motor.
I didn't want to go into an alarm clock and try to work with the internal components, since I am pretty inexperienced, so instead I bought an alarm clock that has an external vibration disk. The disk is meant to go beneath your bed or pillow and shake to wake you up. It connects to the alarm clock via a detachable cord. Anyways, I thought that instead of going into the clock I could just use this external wire to pretty much do the same thing.
Here is a link to the product for reference:
https://www.amazon.com/dp/B000OOWZUK/ref=cm_sw_em_r_mt_dp_F0CJBA2E2CHGQTVT6GFP?_encoding=UTF8&psc=1
I cut off the vibration disk and stripped the wire. I measured the current with a multimeter, and found that the voltage running through the wires jumped around from 0 to 5 to 8 or 9 volts as the alarm went off.
This differed significantly from the voltage discussed in the previous thread, which was a 1.5 volt alarm clock, with the current running to the speakers only going up to 0.8 max.
Currently, I am trying to create the circuit design created in the thread mentioned previously, which to my knowledge was thought up by @Rich2 and drawn up by @absf . However, I wanted to hold off on ordering components until I found out if the design would need to be modified in any way as a result of the higher voltage.
Here is the design. As I understand it, the general idea behind the design is to sense if a current is being sent, and if it is, to activate a second circuit, which has its own battery power source, thus solving the issue of fluctuating or incompatible power coming from the alarm.
Thanks in advance for your help!
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