Electronics Projects, Circuit Diagrams

Electronic Circuits Design of Electronics Projects

Circuite electronice, scheme si montaje

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Power Supply / Re: medium length haircuts
« Last post by Lubunut on January 06, 2018, 09:29:44 AM »
Thank you very much for the link. It is very helpful to me. It helped me a lot.
Decode mobile phones , car radio or other devices / Re: Radio code
« Last post by Lubunut on January 06, 2018, 09:20:10 AM »
Thank you very much for the code. It is very helpful to me. It helped me a lot.
Projects ideas / Re: DIY Hexapod4 Spider Robot
« Last post by Mowichanee on December 12, 2017, 09:56:03 AM »
After I read this. It made me realize something even more.
Robotics / Re: How to make a remote control tester?
« Last post by Blake13 on October 23, 2017, 05:21:51 PM »
Other / Cum sa alegi o baterie externa?
« Last post by kgb13 on September 15, 2017, 10:04:00 AM »
Vreau sa imi cumpar o baterie externa si nu stiu ce sa aleg. Am vazut multe modele interesante pe https://www.gadgetworld.ro/ (5000 mAh - 20.000 mAH).
Eu ma gandeam la o baterie de 10.000 mAh maxim pentru 3 incarcari (din cate stiu, bateriile externe se incarca 70%-80% din capacitatea acumulatorului).

Voi cum alegeti o baterie externa?
Vanzari / Re: TV Daewoo ecran plat, diagonala 70 cm, aproape nou
« Last post by ronexprim on September 06, 2017, 03:26:58 PM »
cat de greu e ????
Other / Re: Lanterna cu LED
« Last post by ronexprim on September 06, 2017, 03:25:42 PM »
Cam greu tot procesul, nu vad de ce te-ai preocupa de asta.. oricum, succes!
Other / Instrumente portabile de analiza a uleiurilor
« Last post by ronexprim on September 06, 2017, 03:23:46 PM »
Ronexprim va semnaleaza o gama noua de echipamente portabile pentru testarea uleiurilor aflate in exploatare, produse de SpectroScientific, care va vor ajuta sa reduceti costurile de intretinere a motoarelor, generatoarelor, etc si sa cresteti siguranta in exploatarea lor. Pentru mai multe informatii, accesati:

Projects ideas / Make an Experiment about Amplifier
« Last post by Danmtang on August 25, 2017, 09:35:36 AM »
Good afternoon~
I am a student and I love to make some electronic experiments, Now I am doing a project about car audio amplifier using TDA2040. TDA2040 is a monolithic integrated audio amplifier that operates in Class AB mode. The IC has built in circuitry for short circuit protection and thermal shut down and more over it can be operated from a single supply too. The amplifier can deliver 12 watts into to a 8 ohm speaker.
The circuit diagram is given below as an attachment.

As the circuit shows, IC is wired in order to operate from the cars 12V line. Capacitor C7 is the input DC decoupling capacitor and R4 provides feedback. Network consisting of resistor R5 and capacitor C5 provides high frequency stability and prevents any chance of oscillation. Capacitor C6 couples the ICs output to the speaker. C2 and C1 are power supply filters.
I designed it but the output was very poor. It has humming sound and does not have bass at all. Well.it doesn’t produce a clear sound. Please I need someone help before tuesday, it’s a project I would like to submit as my electronic work as soon as possible.
Thanks in advance.
Decode mobile phones , car radio or other devices / Re: Car Radio Code ( decode )
« Last post by apester on August 12, 2017, 05:53:40 AM »
After battery replacement in X-Trail, need code for radio:


Model No. AGC-0071RF-B
Part No.    281853UP0B
Serial:      DW34N07300063UP0B
Date:       04.06.2013

Help most appreciated  :)
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