How can I use a 9 volt d.c. supply to power a 4.5 volt d.c. radio transceiver without ruining the radio?.
Is it correct that its too many amps that burn things out ,not too many volts?.
So if I can keep the amps down using a resistor then will it be ok?.
Thanks in advance,Ray.
Voltage mismatch
Moderator: Mike Everman
-
- Posts: 72
- Joined: Thu Oct 30, 2003 1:32 pm
- Antipspambot question: 0
- Location: Nottingham
-
- Posts: 100
- Joined: Mon Oct 06, 2003 3:45 am
- Antipspambot question: 0
- Location: Alberta Canada
- Contact:
Info
I made a simple power supply circuit that I attached to an electronics tutorial I made, it's based on the LM317T and can be seen at the bottom of this page:
http://www.rescyou.com/atom/part2.htm
You will be able to "tune" in the voltage to make 4.5 volts exactly if you like with the potentiometer.
For those interested I won't be finishing the Atom tutorial any longer as my Atom blew up the other day whilst attached to one of my turbine devices that autodestructed when I forgot to hook up the fuel shut of leads.. Was rather messy to say the least after it puked at about 120k rpm and litered the area with little pieces of my freaken compressor that I just finished about 200hrs of machining on. A case of beer, or two was drank in it's memory. I'm using PIC's now for all my controls, much faster ;)
If all you need is 4.5 volts though, a 7805, as previously suggested, would probably work ok. Do a search for 7805 or LM7805 on google and there will be many pages devoted to it. I believe you only need 1 or 2 capacitors to make it run effectively.
S.
http://www.rescyou.com/atom/part2.htm
You will be able to "tune" in the voltage to make 4.5 volts exactly if you like with the potentiometer.
For those interested I won't be finishing the Atom tutorial any longer as my Atom blew up the other day whilst attached to one of my turbine devices that autodestructed when I forgot to hook up the fuel shut of leads.. Was rather messy to say the least after it puked at about 120k rpm and litered the area with little pieces of my freaken compressor that I just finished about 200hrs of machining on. A case of beer, or two was drank in it's memory. I'm using PIC's now for all my controls, much faster ;)
If all you need is 4.5 volts though, a 7805, as previously suggested, would probably work ok. Do a search for 7805 or LM7805 on google and there will be many pages devoted to it. I believe you only need 1 or 2 capacitors to make it run effectively.
S.
The mind of a man is the man himself.
-
- Posts: 328
- Joined: Mon Oct 06, 2003 6:51 pm
- Antipspambot question: 125
- Location: New Zealand
Re: Info
200 hours... you poor man... i deserve more then 2 beer for that!!Rescyou wrote:For those interested I won't be finishing the Atom tutorial any longer as my Atom blew up the other day whilst attached to one of my turbine devices that autodestructed when I forgot to hook up the fuel shut of leads.. Was rather messy to say the least after it puked at about 120k rpm and litered the area with little pieces of my freaken compressor that I just finished about 200hrs of machining on. A case of beer, or two was drank in it's memory. I'm using PIC's now for all my controls, much faster ;)S.
Stephen
-
- Posts: 100
- Joined: Mon Oct 06, 2003 3:45 am
- Antipspambot question: 0
- Location: Alberta Canada
- Contact:
Cases
I do believe I lost count somewhere around beer #19. And not only did I feel bad about blowing my work up, I now had a killer hangover to make matters that much worse. Gotta love industrial strength Canadian beer.
s.
s.
The mind of a man is the man himself.
-
- Posts: 5007
- Joined: Fri Oct 31, 2003 7:25 am
- Antipspambot question: 0
- Location: santa barbara, CA
- Contact:
-
- Posts: 72
- Joined: Thu Oct 30, 2003 1:32 pm
- Antipspambot question: 0
- Location: Nottingham
thanks
thanks for the info, you two.
Ray.
Ray.