Are there anyone can help me to give information about transistor DE 9926 and 9915? Could you like to share their datasheet ? I can not find their datasheet in every internet.
This is the transistor that I mean.
DE 9926 and 9915 datasheet
transistors
Related Solutions
It's an MJD31, which is equivalent to a TIP31 (a popular 3A 40V NPN transistor).
To see if it is causing the short you could just unsolder the Emitter lead. Inductor L3 looks like its insulation has broken down, and will also need to be replaced or rewound.
Yes, you can use a relay for direction reversing of a brushed DC motor. It would use a DPDT relay as shown in the diagram below. And yes, at the same time you can use an N-Channel MOSFET transistor to control the speed of the motor by driving the MOSFET with a high speed PWM signal. The duty cycle of the PWM would control the motor speed.
With the proper selection of MOSFET you would be able to drive the MOSFET from the PWM output from your Arduino. The direction relay coil is shown as using the same voltage as that used to power the motor. If the relay coil was a different voltage it could be connected to a separate voltage rail.
Best Answer
They might be MJW16060A NPN high-voltage transistors, the packaging matches. The 9926 and 9915 are date codes most likely.