Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [l293d]

For questions about the L293D quadruple half-H driver integrated circuit.

For questions about the L293D quadruple half-H driver integrated circuit.

See the L293x datasheet for more information.

52 questions
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Problems with L293, L298 and SN754410 H-bridge drivers on a low voltage 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 time the same question keeps coming up - someone is…
Andy aka
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Why do we use capacitors in parallel with DC motors?

Below is the circuit diagram of an L293D motor driver IC driving 2 12V DC motors. What I don't understand is the use of the capacitors marked 104 in parallel with the motors.
Bhavik Khatri
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L293D 2 Phase Bipolar Stepper Motor

I have an M35SP-11NK stepper motor that I would like to be able to drive with an L293D driver chip. The circuit below is how I've got it wired up so far. I've derived this from numerous sources on the internet and referring to the datasheets linked…
OdinX
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Can't get L293D to work with Raspberry Pi Zero W

I have the following When i turn GPIO 17: high GPIO 22: high GPIO 27: low or GPIO 17: low GPIO 22: high GPIO 27: high nothing happens, what have i done wrong? I have verified that all GPIO 17, 22 and 27 work by connecting them to a Diode and a…
Peter
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Circuit power issues causing LCD to change brightness when motor operates

My apologies I'm still getting to grips with the more advanced aspects of electronics, so apologies if this is a stupid question! I'm building a sensor device with a Raspberry Pi, and have got multiple devices connected to it using a breadboard. I'm…
Jack Pollock
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Two 9 V batteries in parallel

I don't know where else to ask this question and I think this is the best place so I'll ask here. I'm making a remote controlled boat that uses two DC motor controlled by a L293D motor driver chip. It takes power for driving the motors from 4.5 to…
vastqud
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L293D and PWM on enable pin: TTL voltage drops to 4 Volts

I'm building a simple motor shield for Arduino based on the L293D bridge driver. I'm doing some tests on a breadboard everything is fine as long as I drive the motor at full throttle with DC inputs (enable HIGH, inputs HIGH and LOW to spin…
dodod
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What type of diode?

I'm using raspberry pi 2 for driving a motor,, using motor driver L293d, through gpio pins of RPI. My question is,if some short circuit happens between input and output of L293d,,12v goes to RPI,and it may burn it. How can we prevent that loss? If…
sarfaraaz
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Pin with no driver - Kicad

I'm new to Kicad and I'm having some problems using Eeschema. Every time I connect a power source to an IC pin, in this case the L293D, I get the following error: ErrType(3):Pin connected to some other pins but no pin to drive it I'm just…
tulians
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ESP8266 WeMos L293D explode

I tried to use an L293D to drive 24 V passive buzzer using WeMos ESP8266. But for an unknown reason the L293D explodes or burns even without any load. I'm using 24 V power supply and an MP1584 step down to 5 V to power the WeMos. The connections are…
rev
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Motor rotates well in one direction but runs slower in other with L298N and L293D

I connected two motors with an L293N driver. When I control it with my joystick, one motor works fine (Out 1 and 2 of driver). It rotates in one direction and the other very smoothly. The problem occurs with the second motor (Out 3 and 4 of driver).…
HexaTech
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Can L293D be used for this motor?

Specs for the motors: At 3VDC we measured 150mA @ 120 RPM no-load, and 1.1 Amps when stalled. At 4.5VDC we measured 155mA @ 185 RPM no-load, and 1.2 Amps when stalled At 6VDC we measured 160mA @ 250 RPM no-load, and 1.5 Amps when stalled. I…
Hao C.
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L293D and PWM speed control

I'm using L293D to control a motor. The motor input pin of L293D is controlled by output pins of HT12D IC. To control the speed of the motor I have a PWM signal from Arduino, but to which pin of L293D should I connect. I think it should be pin 8,…
knight
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Connecting different DC grounds to a single motor driver IC

I'm building a simple robot and have a L293D motor controller (details here and diagram below on the left). It takes two positive input voltages - one for powering the IC and one for driving the motors (in my case it will be +5V and +9V). However,…
g491
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Why ACS712 is abruptly dropping its voltage output?

I have built a board as shown in the images and the schematic below. I know that according to the datasheet when no current is flowing through the ACS712 it should output something around 2.5V always. However, the sensor is presenting a weird…
Athus Vieira
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