Modifying PR21

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Modifying PR21

Postby MiR » Thu Oct 07, 2010 11:29 am

Hi.I want to modify this PR21 circuit into digital multi functional clock.This clock can change it modes just by rotating it (using ADXL 330).It have 4 mode there is clock mode, alarm mode, temperature mode, timer mode or maybe game mode.It can sense temperature of surrounding (using LM35), display date and time using (DS1307 RTC chip).Can u give me some suggestion or guideline for me to complete my hardware design. :?:
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Re: Modifying PR21

Postby kl84 » Thu Oct 07, 2010 1:18 pm

Besides PR21, you may refer to PR11 (Temperature Control System using LM35) and PR12 (Display RTC on LCD).

You'll have to scrutinize the schematics, user's manuals and software programs of these three DIY projects. I believe they are sufficient for you to come out with your circuit and program.
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Re: Modifying PR21

Postby MiR » Thu Oct 07, 2010 3:03 pm

owh...that is what i want to do but im not sure either it is ok or not...seem u suggest me the same way that i though before, i will try to come out the schematic of PR21 that i add LM35 and RTC by refering PR11 and PR12...tq... :D
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Re: Modifying PR21

Postby ober » Mon Oct 11, 2010 10:56 am

MiR, good to hear that! Do share with us when you have prototype. Hope to see the result soon.
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