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Nazzy, the NO JOIN HERE wire is just connected to the board and not connected to anything else? OR connected to the battery power supply?
D
Not trying to put down the Champ Amp. I'm sure it will work just fine, but wanted to share a recent purchase on ebay:
http://cgi.ebay.com/Low-Voltage-Audio-Amplifier-Module-Based-NJM386...
For $8.50 shipped (from Hong Kong) the board came assembled as shown in the picture. It uses the same LM386 Amplifier as the Champ, and includes a volume pot with an on/off switch. All you need to do is add the speaker, power supply (9V battery) and input jack, like Nazzy showed you above. The nice thing is that this board has screw terminals, so you don't have to solder on the board.
Also, you can add an LED, but Nazzy is right about the resistor. Radio Shack sells LED assemblies that have a resistor build in for $2:
http://www.radioshack.com/product/index.jsp?productId=2062569
I love doing soldering/board level projects, but as my eyesight deteriorates with age, I find myself looking to for the easy way out.
Dave, I just bought a NJM386 like you were talking about from eBay. 2 questions: What do you power it with (9v battery?)? And what size speaker (what or how many ohm)?
Dave Onastik said:Not trying to put down the Champ Amp. I'm sure it will work just fine, but wanted to share a recent purchase on ebay:
http://cgi.ebay.com/Low-Voltage-Audio-Amplifier-Module-Based-NJM386...
For $8.50 shipped (from Hong Kong) the board came assembled as shown in the picture. It uses the same LM386 Amplifier as the Champ, and includes a volume pot with an on/off switch. All you need to do is add the speaker, power supply (9V battery) and input jack, like Nazzy showed you above. The nice thing is that this board has screw terminals, so you don't have to solder on the board.
Also, you can add an LED, but Nazzy is right about the resistor. Radio Shack sells LED assemblies that have a resistor build in for $2:
http://www.radioshack.com/product/index.jsp?productId=2062569
I love doing soldering/board level projects, but as my eyesight deteriorates with age, I find myself looking to for the easy way out.
Hi Sod Brother.
That pre-assembled amp on E-Bay interested me, so I followed the URL and either there or thereabouts, I scrolled down the page and came to a scematic and then some more board specs.
The operating power for this amplifier can range from 4 VDC to 12 VDC, with 9VDC being a common option. A 9VDC transistor radio style battery should do the trick.
I did not see a spec on the speaker rating, but the R1 resistor on the output side of the Op Amp is 10 ohms, so it should work with any 8 ohm speaker.
Hope this helps.
-Rand.
sodbrother said:Dave, I just bought a NJM386 like you were talking about from eBay. 2 questions: What do you power it with (9v battery?)? And what size speaker (what or how many ohm)?
Dave Onastik said:Not trying to put down the Champ Amp. I'm sure it will work just fine, but wanted to share a recent purchase on ebay:
http://cgi.ebay.com/Low-Voltage-Audio-Amplifier-Module-Based-NJM386...
For $8.50 shipped (from Hong Kong) the board came assembled as shown in the picture. It uses the same LM386 Amplifier as the Champ, and includes a volume pot with an on/off switch. All you need to do is add the speaker, power supply (9V battery) and input jack, like Nazzy showed you above. The nice thing is that this board has screw terminals, so you don't have to solder on the board.
Also, you can add an LED, but Nazzy is right about the resistor. Radio Shack sells LED assemblies that have a resistor build in for $2:
http://www.radioshack.com/product/index.jsp?productId=2062569
I love doing soldering/board level projects, but as my eyesight deteriorates with age, I find myself looking to for the easy way out.
I did not see a spec on the speaker rating, but the R1 resistor on the output side of the Op Amp is 10 ohms, so it should work with any 8 ohm speaker.
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