gsmicro

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2011-11-05T20:46:00.000-07:00

Welcome to GSmicro..................

This site contains a collection of PIC projects which is useful & interesting to many people.

Microchip is the original manufacturers of these PIC micro controllers.
Visit their site http://www.microchip.com

This site more focused on new comers, Students, Hobby Enthusiastics & Engineers to get some ideas & make their own designs to make their life easier.

Copyright

All the projects, diagrams & techniques used in this site was my sole property. Copying & distributing or any other profit making terms will be fully prohibited. If any situation occurs please inform me along with the supporting data.

Author : GPJ Soyza
E mail : gayan1.lk@gmail.com

JDM Programmer

2011-11-04T19:33:00.001-07:00

Free..........

Here is a modified version of the JDM programmer. It works well with newer PIC’s which is MCLR OFF & INRCOSC ON.

I also added an ICSP connector so it can connect to different pin count target boards to program variety of PIC’s.

For the software you can use IC Prog or WinPIC 800 or any other which supports JDM programmer.

Email me to upload PCB drawing in PDF format.

PIC SMS Controller

2009-07-11T22:41:00.000-07:00

This is a very useful full duplex wireless communication system which can control devices miles away. This SMS controller will detect inputs & send SMS’s to the users mobile & also it will receives users SMS’s & turn on separate relay outputs very accurately.

Features

* High Speed Nokia FBUS Ver2 Protocol Implementation

* 4 Channel Sensor Inputs

* 4 Channel Relay Outputs

* SMS Status LEDs

Operation

There are 4 inputs & 4 outputs. You can connect 4 sensors to these inputs ex: PIR sensors, magnetic window sensors etc…..& for the 4 output relays you can connect buzzers or electric door closers etc….

When any of the inputs get triggered then the SMS controller will send a SMS to the users mobile phone (users mobile number will preloaded to the program).ex: “ZONE-1-AL” will send to the users mobile notifying that in the zone1 there’s an input.

When any of the input presents the “Input Presence” LED will light up. After a short while a SMS will sent to the user. If the SMS successfully sent then the “SMS Sent” LED will lights up for a short time. If the “SMS Send Fail” LED lights up then the SMS has not sent by the SMS controller. This happens due to network busy or no signal conditions.

When the user receives any of these SMS messages ex: “ZONE-1-AL”, “ZONE-2-AL”, “ZONE-3-AL”, “ZONE-4-AL” you can send a SMS & control any relay in the SMS controller. If you send a SMS “ZONE-1-RL-ON” the SMS controller will automatically receives this SMS & turn on the Relay1.Likewise you can control all 4 relays in the controller.

When the SMS controller receives a SMS it will indicate in the “New SMS” LED telling that there is a new SMS. But it will take the action by reading the proper message sent by the user.

Schematic

LED Signboard 64 X 8

2009-07-11T22:31:00.000-07:00

This LED Signboard will display preset messages moving all 4 ways with some animations. This is ideal for display advertising items, shop names & airports where the messages need to show electronically with more attractive manner.

The signboard uses 8x8 LED matrix blocks. It has 64 columns & 8 rows. It will display preset messages already saved in its memory. I have included all 4 way scrolling patterns & some basic animations to look the signboard more attractive.

The whole circuit will work from single 5V supply.

Here is a video of the above signboard.
http://www.youtube.com/watch?v=A_0Mpr_M4D8

Digital Temperature Controller

2009-04-26T20:01:00.000-07:00

This is a very useful digital temperature controller where it can control a device within a user define two temperature set points very accurately.

Features

*User define two set points (lower & upper limits)
*0.5C accuracy with a temperature range 00.0C to 99.5C
*Built in software hysteresis for stable operation
*Temperature limit indicators
*Easy menu system for adjust & view temperature

Operation

If the user sets the lower temperature limit to 27.0C & sets the upper temperature limit to 39.5C, the relay will be “ON” if the current temperature is in between these set points. And whenever the current temperature goes above or below of these temperature limits the relay will goes “OFF” & waits until the current temperature comes between the two set points.

How to set the lower & upper limits?

Press the “MENU” button. You will see the lower limit indicator will light & shows the lower temperature. Press the “ADJUST” button to change the lower set point to a desired value.

After setting lower set point press the “MENU” button & it will light the upper limit indicator & displays the upper temperature. As above press “ADJUST” button to change the upper set point.

After adjusting set points pressing the “MENU” button will direct you to come to the normal mode to display current temperature & you will see the decimal point is blinking in this mode & is ready to do the task you have already assigned.

Note: LM35 works well with temperature starting from 2C onwards.Getting below 2C will require additional diodes in the hardware itself.

Schematic

Hour Alarm Clock

2009-04-05T20:08:00.000-07:00

This clock will work extremely accurate as a real time clock & also it will give you an alarm notification on every hour. This clock uses 12 hour clock format.

Features

*High Accurate Timing
*AM/PM Indicator
*Hourly Chime
*Key Press Tone
*Power Sense / Display Off
*Battery Backup

How to Adjust Time

There are two buttons, Hour button & minute button. Press & hold the correspond button & it will automatically increment the display value. When the correct value (time) comes released the button. While pressing you may also hear a key pad tone for a short period time.

Note: when adjust the time it will reset the seconds to zero “00” automatically so you can keep the time to the exact second.

AM/PM Indicator

Every 12 hour the AM/PM led will toggles. You can change the state of this led by adjusting the hour button.

Power Sense / Display Off

There is a separate input for power sense. It will always monitor the external power is present or not.

If the external power is present the clock will work normally with all the features.(Hour Alarm, Key Press, AM/PM etc...)

If the external power is not available it will shift to backup battery & keep the time running without getting switched off. When the clock is running from backup battery, the display will be switched off & all the features will be disabled. So only the internal clock program will run in this mode.

When the external power comes it will give you an alarm notification & start powering from external power mode. Now the display will start displaying the present time & the clock will work with all the other features.

Piezo Diaphragm

You need a piezo diaphragm (without built-in oscillator). Which means it has only diaphragm & requires an AC waveform or pulsed-DC to produce a sound.

The other type piezo is a piezo diaphragm with built-in circuitry which only require dc source to generate the sound.

You need the first type piezo above mentioned.

PIC Clock Timer (8Channel)

2009-03-11T03:10:00.000-07:00

This is one of useful clock timers I have built. You can set different ON & OFF time periods for your home / factory appliances & this clock timer will automatically respond to that times daily basis very accurately.

Features

*24 hour clock format
*8 separate channels
*8 separate channels with ON/OFF time indicators
*continuous mode operation
*User friendly adjust menu system

There are four buttons - HOUR, MINUTE, MENU, SHIFT

Adjusting Clock Time

When power up all 8channels will be turned off (you can see all LED indicators are off) & you can see the clock is running (clocks two dots will blink).You can adjust the time by pressing HOUR or MINUTE buttons.

Setting Alarm Channels

While clock is running if you press the MENU button it will direct you to the 1st alarm channel & the 1st channel indicator will lights up to confirm you. If you again press the MENU button it will go to next channel that is channel2 likewise it will increment on each press.

The ON TIME & OFF TIME LED’s will show you whether you are going to set the ON TIME or OFF TIME in the particular channel. To set the required time just use HOUR or MINUTE buttons.

Pressing the SHIFT button will shift the set times between ON TIME or OFF TIME in the particular channel. The ON TIME & OFF TIME LED’s will confirms this to you.

Press the MENU buttons until you passes the last alarm channel. So you can come to standby Time mode. Now you can see some of your LED alarm indicators will lights up notifying that you have already set an alarm in the particular channel or channels.

Alarm set has been completed & it will automatically do the timings for you.

Output channels working condition

The particular channel will wait until its ON time comes & when the time equals it will turn on the relay & after it will wait until its OFF time comes & when the time equals it will switch off the relay output & waits until ON time comes again.

Turn OFF a particular channel

To off a particular channel just equal the ON TIME & OFF TIME values (it can be any value).

Mini Signboard

2008-12-16T02:07:00.000-08:00

Mini signboard allows you to scroll a message which you have already saved in its memory.

Features

*Custom message setting (String length = 50 letters including spaces)
*50 different characters = A-Z, 0-9 & special characters
*Battery power operation 3.6V-4.8V

Operation

Mini signboard design under a PIC16F628A micro controller. Use high efficiency LED matrix's so it allows battery life to work longer.
When power up it will scroll the message that is in the memory. Even though after a power failure, last saved message is still there. If you need to change your message just follow the steps in “Saving your own message” section.

Supporting characters

A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z,__,1,2,3,4,5,6,7,8,9,
<, > , / , % , ” , . , : , = , - , HEART,FACE

Saving your own message

Press & hold the select button & the display will get blanked.

When you see the blank display, release the button.

After you can see the letter “A” will display on the display. At each press on the select button will increment the character by one. A, B, C …..1,2,3,4,5,6,7,8,9 /> etc…….

When it displays the required character press the save button & it will mark the character in the memory. Likewise make the whole message by those two buttons.

After finish marking all the characters press & hold the save button for 4 seconds & it will save the whole string into the memory that you have marked already.

If you have successfully saved then a sign may appear on the display & after releasing the save button you can see your message is scrolling nicely.

Notes

When saving the entire string (press & hold the save button) the displayed character will be saved last.

Space or blank character is next to character “Z”

Two Channel AC Lamp Fader

2008-11-18T22:41:00.001-08:00

This is a 2 channel AC lamp fader.The project can apply where it needs to fade an Incandescent AC Bulbs.

Operation

This circuit will fade out two 230V AC bulbs accordingly which means when one bulb starts to fade from dim to full brightness the other bulb will fade from full brightness to dim at the same time.

Speed Adjust

To change the fading rate (speed) adjust the preset value at any time.

Time Limits

There are some time limits in this circuit because the whole time base is running under 50Hz frequency.

Minimum fade time from fully dim to fully bright = 2.5Seconds
Maximum fade time from fully dim to fully bright= 25Seconds

After power up the whole circuit affected by the AC mains. So be careful when powering the circuit.

Schematic

Infrared Remote Switch

2008-11-16T18:27:00.000-08:00

This project allows you to control a relay with an ordinary Phillips remote control button which you have already assigned.

Features

User define button assignment
Selectable two output modes
IR Signal indicator

Operation

In a remote controller there are so many buttons. You can assign a button for this project that is rarely used & with that button you will allow to control your output.

The circuit use RC5X protocol to transfer the data. It can use with any RC5X supported Phillips remote controllers. Ex: Phillips TV, DVD, VCR, Home theatre etc…..

Two output modes

GP0 output:-

When it received a valid IR code this output will toggle.

Gp1 output:-

When it received a valid IR code this output stays on until you released the remote controller’s button.

These two output modes can be selected by the SW2 switch.

User define button assignment

You can select any button in your RC5X Phillips remote controller to work out.

Press & hold the SW1 button & it will light up the indicator LED. Within this period you press one of your remote controller’s button. You can see the indicator LED will blink couple of times notifying you that successfully saved your button. When you see the LED is blinking release the SW1 button.

Digital Key Lock

2008-11-09T19:22:00.000-08:00

The project allows you to switch on a relay output by entering a secret code.
The application can use as an access control system, or can used in safety cupboards which can only operate by authorized persons.

Features

*6 digit secret code with code change option
*code length indicator & key press indicator
*separate input for auto door lock
*manual operation

Installing the system

To get the full use of the system you must install it in the correct way.
Door is holds by the Solenoid & the solenoid driven by the output relay which needs a code to operate.

You must place manual button in the same side. This is the button allows to open the door who’s inside.

The reed switch input must place in the door frame & the magnet must fix in the door align with the reed. So when the door is closed the reed signal send as logic “low” & when door open reed signal send as logic “high”

Code length indicator & key press indicator

When you press a key in the key pad the length indicator will light up & also within the press & hold time the key press indicator will also light up. The length indicator will light up until you enter 6 digits. After entering 6 digits it will switch off notifying you that the secret code length has filled.

If the code is correct then the output relay will be switched on. If the code is incorrect then again start entering. The length indicator will light up & it will wait until all 6 digits filled.

Changing the Password

Enter the previous password. So the output LED will light up & the relay will be switched on. Length indicator will also switch off at this time. Now enter the new secret code (6 digits) & press & hold the # key for 4 seconds. If you see the key press indicator blinks two times then you have successfully entered the new secret code.

Manual button operation

When the door is closed if you enter the manual button it will toggle the lock. When the door is open if you press the manual button it will not operate.

Separate input for auto door lock

This signal coming from the REED switch. From this signal the output relay will be switch off after the door is closed back & aligned with the door frame.

Note that there is a small time delay like 5seconds to turn the relay off (solenoid off) after aligning with the reed switch signal. This is just to ensure that the door is completely aligned with the frame.

Automatic Night Light Timer

2008-10-16T22:05:00.001-07:00

The circuit allows to operate an light bulb with a pre defined time period on daily basis automatically.

Ex: Assume a garden light needs to switch on 8.00 pm and needs to switch off 11.00pm daily basis. The solution is a predefined timer to switch on & off the bulb. So here is the solution & it will do the job on daily basis automatically.

Features

* User define hour adjustments
* Remaining hour’s indicator
* Timer ON /OFF function
* Manual lamp ON / OFF function

The circuit has two buttons & one indicator.

Button1 = mode (turns on & off timer/edit mode)
Button2 = adjust (manual on & off/adjust hour counts)
LED = indicator

Led on = stand by
Led blinking = timer running

Manual lamp ON / OFF function

In standby mode pressing the adjust button will allow to switch on & off the lamp

Timer ON /OFF function

Press the mode button it will turn on or off the timer.

Led on = stand by (Timer Off)
Led blinking = timer running

Remaining hour’s indicator

If the lamp on if it blinks 8 times followed by a long gap it says the lamp will off in another 8 hours.

If the lamp off if it blinks 4 times followed by a long gap it says the lamp will on in another 4 hours.

User define hour adjustments

Press & hold the mode button for 4 seconds & it will go to the edit mode (The LED will go off in the edit mode). Now press the adjust button to the required hours (LED will flash on every press). Ex - If need to turn off the lamp in 6 hours then press the adjust button 6 times. Press the mode button & it will save the newer value & will start the timer.

Operation

When power up or after a power failure the circuit in standby mode (Led on continuously) & the lamp is in off state.

To turn on or off the lamp manually (without a timer) just press adjust button & it will toggle the output lamp.

If you need to turn on the timer then press the mode button once & it will starts the timer running (Led blinking).It will control the lamp automatically with the pre defined time periods.

To turn off the timer just press the mode button.

Schematic

Digital Thermometer

2008-10-12T19:37:00.000-07:00

Here is an accurate three & half digit thermometer designed by limited parts.

Features

*Temperature range -55.0C to 125.0C (0.1 degree resolution)
*Both Celsius & Fahrenheit temperature formats
*4 bit LCD mode

The design has used 1 wire protocol for DS18S20 temperature sensor by maxim.

The temperature result format by DS18S20 was extended to 12 bit format. From this 12bit format one decimal point has been calculated.

Hardware

DS18S20 sensor configured as an external power supply mode & LCD configured as 4 bit mode to minimize the wirings. The whole circuit can work from a 5V source smoothly.

Real Knight Rider Effect Circuit

2008-08-10T19:13:00.000-07:00

Starting from a fully bright LED followed by a tail of different brightness LEDs shifting left & right with a calculated speed is the real effect of knight rider running lights.

The trail consists of six brightness levels & it has maximum length of 12 channels to move both sides.

Duty cycles in the fade trail.
1% = Very dim
5% = Dim
10% = Dim average
25% = Less bright
50% = Medium bright
100% = Full bright

The circuit contains with a minimum of parts & can be add more LEDs to make it wider length by using an external driving transistor per each channel.

Schematic

RS232 Phone Dialer

2008-07-21T20:00:00.000-07:00

This is a RS232 phone dialer. Which means you can dial & control a telephone call via the PC software.

Operation

The whole concept based on pulse dialing which in many modems used. The circuit has two output relays.

Relay2 = pulse dialing
Relay1 = control output (connects an external record playback unit)

Software

Software consists of two parts. Dialing and the Sound Source.

Dialing

If you enter a telephone number in the “Telephone Number” text box & press dial it will automatically dial the corresponding number. After dialing completed it will automatically turn on the “Sound Output”

Sound source

*External record unit – can connect an external record/ playback unit.
*Sound card – can use mp3 music from your pc without taking any external playback units.

If you have selected “External record unit" then after dialing completed it will turn on “Sound Output” & relay1.when you press “sound output” it will toggle the relay1 which helps to turn on or off the external record units sound.

If you have selected “Sound card” you can select an mp3 from your PC & playback to the phone. After dialing completed it will turn on “sound output” & plays the selected song. When you press “sound output” it will pause the playback & when you again press it will play the music back.

Note: If you selected “Sound card” then the relay1 will be permanently turned on. It won’t toggle the relay1 like in the “External record unit” mode.

If you want to answer the phone just press & turn off the “Sound Output” & answer the phone. If you need again to play the audio track just press the “Sound Output” again.

If you need to cancel a call press the “cancel” button at any time & it will ready to accept a new telephone number to dial.

Schematic

LED Strobe Light Flasher

2008-07-16T00:55:00.001-07:00

This is a two channel LED strobe light flasher. The project can apply in many Vehicles, Discos & Lighting shows etc where the strobing effect is require.

Operation

It will flash the channel one number of times & same repeating to the channel two one after the other.

Features

*User defined number of flashes (1 to 20 flashes)
*User defined channel shifting speed.
*Mode select - strobe mode or single mode

What are the two modes?

Strobe mode - Flashing channels separately one after the other.
Single mode - Flash both channels at once continuously.

How to select mode?

When you power up it will work as strobe mode. When you press the switch it will shift to single mode. When you again press it will shift to strobe mode likewise when you press the switch it will switch between two modes.

How to edit number of flashes?

If you are in strobe mode if you press & hold the switch for 4 seconds it will automatically go to edit mode then you can see both channels will lights up. Now release the button. If you need 3 strobe pulses you press the button 3 times.For a visual indication the both channels will light up for each press.After automatically it will save the pulses & return to the strobe mode & you can see it will work with the newly saved values.

How adjust shifting speed?

At any time adjust the preset & it will vary the shifting speed of the two channels.

Note:
In single mode adjusting the preset value will cause the flashing rate.