255k views

### Reducing voltage with resistors

I have been looking around for an easy way to convert 12V to 5V. I have seen some people saying that a simple resistor is all that is needed. $$Volts = Ohms \cdot Amps$$  Amps = \frac{Volts}{...
12k views

### L293, L298 and SN754410 H-bridge drivers on low voltage power supply

This question is about the following three integrated H-bridge drivers: - L293 or L293D (D = protection diodes added) SN754410 (protection diodes included) L298 (no protection diodes) Time after ...
665 views

### Why is my PWM efficiency about 50%?

I'm using a BTS7960 module with an Arduino to adjust the voltage for my DC motor. When I check efficiency there is a problem. PWM efficiency is supposedly about 90% but mine is only about 50%. I ...
2k views

### 3V power rail from 5V

I've mistakenly ordered some 3V PIC18 L F14K22 instead of the 5V 18F14K22. 3V output is fine for the designed circuit but I need to make a 3V power rail from the available 5V rail. Since only a ...
4k views

### Correct PWM frequency for motor [duplicate]

I am using 4500 RPM motor.To be specific,this is the motor I am using https://www.robomart.com/4500-rpm-high-torque-dc-motor. I am using Cytron MD10C motor driver to drive it.The PWM source is ...
1k views

### How to troubleshoot a DRV8833 motor driver module problem?

I am trying to control a DC Motor with a DRV8833. To be precise, I have this module from MJKDZ (which, I believe, is not the original one from TI). I measure the voltage on the input pins, they are as ...
541 views

### Anything wrong with connecting L298Ns in parallel?

Although L298Ns are very inefficient, they're very cheap. I have two motors that require 4A+ current at load combined. Can I connect multiple L298Ns in parallel in this way to increase the overall ...
224 views

### How does this modified H-bridge circuit work?

I am trying to design a circuit which will have as an input a single microcontroller pulse which will cause a circuit with two 555 timers to output two consecutive pulses which are able to have their ...
606 views

### INA219 current sensor not working properly with DC motor

I use INA219 module to read DC motor current for control propose. I connect INA219 in series with motor as shown in schematic. simulate this circuit – Schematic created using CircuitLab The ...
281 views

### Difference between h-bridge, dual half bridge and quad half bridge

Note: I am beginner. I'm looking at motor drivers on this website Various motor drivers have different specification for output configuration, i.e. :h-bridge, half bridge, quad half bridge and PWM. I ...
200 views

### Motor Driver keeps dying/frying driving a worm gear motor

I am looking for some consultation about controlling a24VDC worm gear moto. I have blown 4 h bridge motor drivers thus far and while I have been trying to keep my project price tag low I may need to ...
593 views

### Is it necessary to use a pull down resistor with this BTS7960?

I have an Arduino Nano controlling a BTS7960 that is 10 meters away. I have one 24V power supply. Both the Arduino and the BTS7960 get 5V through a an LM2596 step down converter. The BTS7960 "...
186 views

### DC Motor, Torque vs RPM

I am making a pulley system (for an electric bike) that requires about 300rpm and 40lb-inch torque. The motor that I am looking at is a 24V DC Permanent Magnet Electric Motor Generator 250W 2750RPM ...