Hi,
I've built this project in a wiring board and it works, so I'm studying the whole ciruit now... but i wonder what function the diode D1 together with R2 has ???
And if i want to increase the frequency of the (piezo sounder and the LED), i can easily decrease the resistance (R3) or the...
Hi,
I'm trying to build this circuit in CirCad (all components are SM), it's almost imposible to get the PCB without errors ... it has to be short somewhere. My question: is there any automatic way to build the PCB in that program (CirCad)?
Any suggestions please!
Thanks in advance
Hello,
Can i use surface mounted capacitors instead of the two capacitors in this curcuit?
http://www.electronics-lab.com/projects/oscillators_timers/008/index.html
And what's the value of C2 ? is it nano, piko ...? and can i use a LED instead of the piezo sounder (just to indicate).
Thanks to inform me about the 7447, i didn't find 4543 in multisim so i used 4511 instead (but changed the display to "commen cathode" instead) and finally it's working now ... Thanks again
Hello,
I tried to simulate this circuit http://www.electronics-lab.com/projects/misc/012/index.html in Multisim, should pin 14 (count in) be connected to a 5V or GND or ...?
Can you help me please ;D
Hi Audioguru,
Yeah, i saw it. It's so cool, amazing products... they are the leader in automotive audio systems. ;D ( speakers, amps, navigators ... in best cars Lexus , Porsche & Chrysler ... ;D)
Hi Mr. Audioguru,
Thanks for the explanation of the "fake" power of the car stereo ;D
Yes im sorry i forgot to say how the speakers were wired. I chose 8ohm each to get 4ohm in parallel connection.
Thanks in advance
Hi,
Fig. A is a normal connenction of car stereo which has 4-channels. Can i connect like fig. B? What are the consequences, if there are? Can the stereo be overlaoded?
Thanks in advance.
Hi,
I've a digital sattelite reciever (samsung) which doesn't detect any signal... I'm sure that the dish is in right position (my other reciever is detecting signal and working normally at the same position of the dish). Do you think it's a physical wrong for eg (module or something like that)...
Ok, i will change the board ... do you think this board is good (attachment)?
Sorry they were Tantalum capacitors which i used not ceramic, should i change them too, to electrolytic?
I didn't use the pcb layout on the datasheet.
The IC doesn't get hot when in use ...
I used ceramic capacitors (polarized) C1, C2 ? they don't need to be elctrolytic, right?
I've tried to connect it directly to the car battery, but it's still the same problem ...
I've checked out another web-shop to be sure about the differences between these ICs and it looked like this attachment: they are two different ICs.
The DC voltage between pin 8 and 10 is about 1,6V.
Impedance 4 ohm
I use headphones output as an input to the power amp.
I've tried with 14V power supply,