Fun with IKEA lamp

Step 6 Engine.

My little boy PIC12F683 does all job.

Basically this device is programmed as three channel PWM oscillator.
Output of each channel can be connected directly to LED or to power transistor which drives chain of LEDs.
Channels corresponds to Red, Green and Blue colors.
PWM duty determines brightness of LED.
Duty value is randomly calculated and current data is stored in internal EEPROM

There are four different working modes
- slow fading;
- slow switching;
- fast fading;
- fast switching.

Device continuously cycling through modes.
Upon powering up last stored data is used to calculate new duty values so color sequence is always new.

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Preprogrammed chip available upon request.
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Comments

[Valence_4]

Hi... You made your 12F683 work as a 3 channel PWM.... I know the 683 has a CCP module with one PWM output. Did you create three PWM's in software ? because i don't get it. PIC12F683's CCP's PWM output is on pin 5 and you use pins 5-6-7 !

[AP Digital light]

Yes, PWM is implemented in software so I can easy add channels and any pin can be used as output.