Electronic Control

8 channel LCD Temperature meter RS232 – AT90S2313

This is the fully featured, jammed packed temperature readout unit. I can measure temperature from up at 8 DS1820 digital temperature sensors all on the same 1-wire bus. That’s right only 3 wires are needed to go to all the temperature sensors, GND, VCC and 1-wire data. All sensors will connect to the same cable! Anyone who has used the DS1820′s will know that each DS1820 sensor will have a 48bit serial number that is used to address the sensors. With this unit the microcontroller will search the bus automatically for all present DS1820′s and record thier serial numbers in memory. You just connect the sensors and go. You dont have to program in serial numbers of each device.
And to add to the all the features, this unit can display two temperatures on the screen and display 8 temperatures on it’s RS232 serial port. There are a few catches. 1 – You can’t yet pick the two sensors you wish to display on the screen. I only use the unit to display inside and outside temperature so there is no insentive for me to this as an option. The first two serial numbers found on the bus are displayed on the unit. The second catch, you need a PC or terminal monitoring the serial port to display greater that 2 temperatures. No time nor date is displayed on the serial port. This can be very easily added if required. A standard terminal program can be used for logging the temperature from the Readout Unit. The comm settings are 9600bps, 8 data bits, No parity with no handshaking. The RS232 frame shows the serial numbers of all devices connected to the display unit. More than eight DS1820′s can be connected, however only the first 8 devices found are shown. After the serial numbers are dump, the temperature of these devices are then dumped to the terminal in real values. This way no conversion is required on the PC side making life easy! Below is a screen dump of 7 frames from my Readout Unit. Specifications High 0.02deg C Resolution Readouts Up to 8 sensors can be connected on the one bus with automatic search of ROM codes Displays up to 2 temperatures on the LCD panel Backlit LCD with on/off control RS232 Port for logging all 8 sensors on a PC DS1302… http://www.embedtronics.com/avr/tempavr.html

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12v dc motor controller circuit

Often we need to use DC Motor 12V. But it is not easy to control. We see the deployment, a wide range of speed control, turn on-off, etc.

DC Motor drive
DC motor controller
DC motor controller diagram

12V DC Motor Speed Controller by IC 4011 This is circuit 12V DC Motor Speed Controller by IC 4011..It is easy circuit and easy to build Low cost too.VR1 for control speed DC motor 12V. …..

Simple DC Motor Control circuit was built to operate a small motor used for opening and closing a pair of curtains. As an advantage over automatic closing and opening systems, you have control of how much, or how little light to let into a room…..

12V DC motor for Cassette tape speed controlReverse engineered circuit diagram of a motor speed regulator out of a line powered Cassette dictation machine containing a single heafty motor for all functions. This circuit works amazingly well, keeping the motor speed constant regardless of shaft load.
Unmarked didoe are silicon so use 1N4148…..

PWM 12V DC motor speed regulator Reverse engineered circuit diagram of a PWM motor speed regulator out of an oral irrigator water pump. This circuit works quite well, keeping the speed of the small PM motor fairly constant regardless of load. No transistor heatsink is required since this is a switching regulator. The efficiency under high load would be a improved if the output transistor was made to switch faster. …

Pulse Width Modulation DC Motor Control by 4011 Often, people attempt to control DC motors with a variable resistor or variable resistor connected to a transistor. While the latter approach works well, it generates heat and hence wastes power. This simple pulse width modulation DC motor control eliminates these problems. It controls the motor speed by driving the motor with short pulses.,….

DC Motor Control with TIP31 Here, S1 and S2 are normally open , push to close, press button switches. The diodes can be red or green and are there only to indicate direction. You may need to alter the TIP31 transistors depending on the motor being used. Remember, running under load draws more current. This circuit was built to operate a small motor used for opening and closing a pair of curtains. ….

PWM Control Speed Motor 12V By TL494 This is circuit PWM Control Speed Motor 12V with IC TL494. I See from Idea Circuit by joe (aircraftdesigner) Good Elecronics user. Thank you very much……

DC motor controller diagram with SCR and cmos ic This is speed controller circuit of 12Volt DC motor.You can adjust the speed of rotation of the spindle motor from 5-60 cycles per minute. The work of circuit, The IC1 is nand gate ic type,It accepts the voltage from the bridge diode BD1. But there is no filter to smooth current.The other in the pin 2.The VR1, C1 and R1 is a phase shift or time delay to slow down,voltage from pin 3 to triggers pin the gate of SCR1 to work.Or conductors to the motor, causing it to rotate. Speed of the motor, can be achieved by adjusting VR1. …..

Basic 12v Motor Speed Controllers using 2N3055 In this circuit a LM339 quad voltage comparator is used to generate a time delay and control a high current output at low voltage. Approximatey 5 amps of current can be obtained using a couple fresh alkaline …..

Pwm controller ic motor control circuit

I think about Pwm controller ic motor control circuit with a lot, so it is not easy to find.
I created the following link.

PWM Control Speed Motor 12V By TL494 This is circuit PWM Control Speed Motor 12V with IC TL494. I See from Idea Circuit by joe (aircraftdesigner) Good Elecronics user. Thank you very much.[...]

PWM Speed Motor Controller By IC 555This 555 timer based PWM controller features almost 0..100% This 555 timer based PWM controller features almost 0..100% pulse width regulation using R1,
while keeping the oscillator frequency relatively stable. The frequency is dependent on values of R1 and C1,values shown will give a frequency range from about 170 to 200 Hz. Any 555 chip will do, CMOS is fine as well.[...]

PWM Motor Speed Controller – DC Light Dimmer by IC LM324 A pulse width modulator (PWM) is a device that may be used as an efficient light dimmer or DC motor speed controller. The circuit described here is for a general purpose device that can control DC devices which draw up to a few amps of current. The circuit may be used in either 12 or 24 Volt systems with only a few minor wiring changes.[...]

Servo pulse to PWM converter by LM324 The circuit presented on this page attemps to be an interface to convert pulses such as provided by a Basic Stamp or R/C receiver to a dual PWM(Pulse Width Modulation) signal required by an H-bridge. The simplest circuit would use a small microcontroller like a PIC. [...]