- #1
Harsh Bhardwaj
- 17
- 3
I am carrying out a physics experiment to measure g by free fall using an Arduino. This experiment requires accurate time measurements of upto a millisecond. I am using a relay to turn on/off an electromagnet and there is a maximum lag of 10ms due to the relay. I am a complete beginner. Please suggest alternative mechanisms to switch the electromagnet and save those precious milliseconds. P.S. - the magnet is driven by 12V 2.5A DC.
UPDATE
I tried something like this using an NPN 2N2222A transistor. This transistor couldn't hold the required current for the electromagnet and a lower power supply was not strong enough.
UPDATE
I tried something like this using an NPN 2N2222A transistor. This transistor couldn't hold the required current for the electromagnet and a lower power supply was not strong enough.