It diode 1n4148 datasheet pdf one of the most popular and long-lived switching diodes because of its dependable specifications and low cost. Today manufacturers produce the 1N4148 and sell it as either part number. These device types have an enduring popularity in low-current applications.
Though the original 1N4148 and 1N914 existed only in an axial package, the 1N4148 was later repackaged into various surface-mount packages. Note: Some surface-mount packages are marked with “T4” text. Texas Instruments Incorporated, publication no. This page was last edited on 17 October 2017, at 15:07. It works splendidly, its posses almost all the characteristics of the original Arduino motor shield. It’s almost considered as a clone. It’s controlled using 4 PWM pins.
I’m going to use it for the national SUMOBOT competition. What Is A Motor Shield? It only cost me P363. The prices would decrease to P262. The guide includes the datasheet, schematic diagram, PCB layout, Arduino test files and etc. All you need is an hour and the 6 step instructable.
Everything is cheap here, the links that I gave are only alternative for online purchases. My real price list and spending is a lot different and cheaper. In this step, I will show you the schematic diagrams, datasheets and PCB layouts. Just download the files below.
I used a Photo-postive PCB board instead of the traditional toner transfer. The photo-postive PCB is a bit rare in the U. In making the photo-positive PCB, it’s better to stay in a dark area and have a 10W fluorescent lamp beside you, also use a kitchen timer to set a 5 minute alarm for counting the exposure time. Please pay particular attention to the part placement. The diodes should be soldered with their proper polarity.
The 7806 regulator chip was also bent for the whole circuit to fit in my robot. Since I could not find a heat sink that was thin and small enough for the whole circuit to fit, I made my own heat sink by using a small sheet of metal . Almost everything is uniform in values. The diodes are all the same, and also the resistors.
Anyways, the motor outputs doesn’t have a label of polarity, it’s all about your codes, it has a reverse function, that’s why the output polarity is interchangeable. For the power, the left side of the terminal block is the positive and the right is the negative. There’s no need for connecting a power cable to your Arduino since the 6v regulated power supply of the Motor driver circuit is connected to the “vin” pin of your Arduino board. The power input should now be connected to your Motor Driver circuit instead of the Arduino’s DC Jack.