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Control
Circuits Page 2
Control Circuits:
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Last Updated on:
Monday, October 03, 2011 06:07 PM |
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Circuits Designed by Dave Johnson, P.E. : |
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DC Motor Brake
When the power switch is closed, the gate voltage of Q1 turns Q1 on. The
drain of Q1 swings low, turning off Q2. Current flows freely into the DC motor
with only one diode drop from D2. When the power switch is open. The
gate voltage of Q1 swings low, causing the drain of Q1 to swing high. This turns
on the transistor Q2. With Q2 on, the resistor R3 is switched in parallel
with the motor, producing a braking action.
The value of R3 can be selected for the desired
braking action. A zero ohm resistance will produce the fastest slow down
of the motor. The circuit below is good for about 500ma of motor current.
A Q2 transistor with a lower on resistance would be needed for bigger motors.
Also, D2 would need to increase in size
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Links to electronic
circuits, electronic schematics, designs for engineers, hobbyists, students &
inventors:
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Dark-Activated 230V Lamp - Compact circuitry using
small-size parts only. Can be wired in parallel to existing
switches. (added 6/06) |
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DC Motor Brake - When the power switch is closed, the gate
voltage of Q1 turns Q1 on. The drain of Q1 swings low, turning
off Q2. Current flows freely into the DC motor…. [Designed by David A.
Johnson] |
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DC Motor Control Circuit - This circuit uses solid state
switching (transistors) to control direction of a DC motor. You have
precise control of the movement of the motor, and an indication of
direction provided by LED's….(circuit / schematic design added 6/06)
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DC Motor Control using a Single Switch - (electronic Circuit
/ Schematic added 10/04) |
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DC Motor Controller (jcmiras.net) - This DC Motor Controller
circuit will control a 12V dc motor. The system will have three
pushbuttons: a START button, a REVERSE button and a STOP button.
Initially, the motor must not be running. When the START button is
pressed, the motor will run in one direction. (added 6/06)
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DC Motor Driver with L6203 - The L6203 is a DMOS full bridge driver,
which can handle the high peak current up to 5A and supply voltage up to 48V
with RDS (ON) of just 0.3 ohm. The chip can run the motor at 4A continuous
with proper heat sinking…..(electronic circuit added 4/05) |
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DC Motor Model - Although SPICE does not provide explicit models for
electro-mechanical devices, like a DC motor, creating one is fairly
straightforward. You just need to remember that most physical behaviors,
whether mechanical or electrical, can be described by a set of equations. So
for a desired....(spice design added 02/09) |
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DC Motor Pulse Width Modulation Speed Control - This is a circuit
for controlling the speed of small DC motors, it works nicely as a speed
controller for an HO or N gauge model railroad. (electronic diagram added
10/06) |
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DC Motor Reversing Circuit (Christian Sanchez) - A DC motor
reversing circuit using non latching push button switches. Relays control
forward, stop and reverse action, and the motor cannot be switched from
forward to reverse unless the stop switch is pressed first. (added 4/02)
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DC Motor speed Controller - Scroll down to find link to circuit
drawing and circuit explanation….(electronic schematic added 09/06)
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DC Motor-Driver H-Bridge Circuit - Physical motion of some form
helps differentiate a robot from a computer. It would be nice if a motor could
be attached directly to a chip that controlled the movement. But, most chips
can't pass enough current or voltage to spin a motor. Also, motors tend to be
electrically noisy (spikes) and can slam power back.... [David Cook] |
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DC Motor-Driver H-Bridge Circuit circuitdb - Physical motion of some
form helps differentiate a.... (added 2/07)t from a computer. It would be nice
if a motor could be attached directly to a chip that controlled the movement.
But, most chips can't pass.... |
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DC Push Button Motor Control - This circuit uses solid state
switching (transistors) to control direction of a DC motor. You have precise
control of the movement of the motor, and an indication of direction provided
by LED's…. [Andy Collison] |
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DC servo Motor driver - site is currently under construction [Site
is under construction right now] |
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DC Servomotor Controller - An experiment on the DC servomotor
control system. It is controlled with only an AVR. (added 6/06)
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DC/DC Converter operates from Phone Line - 15-Jan-98 Issue of EDN
DC/DC converters for use inside the telephone handset require operation from
the high-source-impedance phone line. Additionally, the CCITT specifications
call for maximum on-hook power consumption of 25 mA. The dc/dc converter in
Figure 1 is 70%-efficient at an input power of 25 mA, providing 5V at 3.4 mA.
Controlled, low-peak switch.... [Design Idea by Gary Shockey, Linear
Technology Corp, Milpitas, CA] |
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Debugging an MCU-based CCD camera Controller - Agilent Application
Note (app note added 6/06) |
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Decoding Infrared Remote Controls - The origin of this posting was
the question what to do with an old TV. I suggested to use the infrared remote
control as an input keyboard for a microcontroller board and mentioned a piece
of code I had written for the 8052 microcontroller. I was asked by some people
to share my information about remote controls... [from Juergen Putzger] |
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Delayed shutter control for Kodak DC-20 - (circuit added 1/07)
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Desktop Power Supply - (application / block diagram added 6/07)
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Desktop Power Supply Clone Market - (application / block diagram
added 6/07) |
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Device Control using DTMF - Controlling devices using switches are
common. From a few decades controlling devices using remote control switches
like infrared remote control switch, wireless remote control switches, light
activated switches are becoming popular. But these technologies have their own
limitations. Laser beams are harmful to mankind. ….(Circuit design added
11/08) |
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Control Circuits next page D-G's |
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Control Circuits:
#-B
C
D-G
H-I
J-O
P-Q
R
S
T
U-V
W-Z |
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