Abraxalito, thank for your answer. If the problem is the long work, I´m on school recess (I´m 16), so I have plenty of time to spare. Also, that chinese manufacturer, is the one you lis on many gerbers in a .txt file?
Then, laserscrape, thank for the advice. Could you link an example circuit please?
Then, laserscrape, thank for the advice. Could you link an example circuit please?
Using OPA1622, this would be one channel:
Vin being signal from DAC
Vout would go to the headphones
refer to the pinout of the op amp and wire it up on some perfboard:
For the power supply you need dual polarity supply (V+ and V-) ,
like this:
You would use 9+9VAC or 12+12VAC transformer and 4700uf filter caps
I wouldnt even bother regulating it, crappy old fixed regs like 7812 only end up making it sound worse than better IME.
An easier and possibly cheaper option is to get 2 AC/DC adapter, from 9V to 15V.
For the negative rail you would connect one of the adapter's ground to V- on op amp, and then that adapter's V+ output to the circuit ground.
You could even make a fully balanced amp too if you wanted, all you'd need is another OPA1622.
The only thing is this may be too simple to satisfy your DIY appetite...
Vin being signal from DAC
Vout would go to the headphones
refer to the pinout of the op amp and wire it up on some perfboard:
For the power supply you need dual polarity supply (V+ and V-) ,
like this:
You would use 9+9VAC or 12+12VAC transformer and 4700uf filter caps
I wouldnt even bother regulating it, crappy old fixed regs like 7812 only end up making it sound worse than better IME.
An easier and possibly cheaper option is to get 2 AC/DC adapter, from 9V to 15V.
For the negative rail you would connect one of the adapter's ground to V- on op amp, and then that adapter's V+ output to the circuit ground.
You could even make a fully balanced amp too if you wanted, all you'd need is another OPA1622.
The only thing is this may be too simple to satisfy your DIY appetite...
Last edited:
If you don't mind the hours you'll spend soldering short pieces of wire at both ends then there's no problem at all with making your own vias.
Sorry I can't catch your question at the end - do you ask the name of the manufacturer?
The particular manufacturer I used was found via Taobao and I don't think they're serving international customers. You can try these guys instead, they have service in many languages : China PCB Prototype & Fabrication Manufacturer - PCB Prototype the Easy Way
A bass booster might just be a high-pass filter with a high-ish Q. Meaning it peaks before rolling off the response at lower frequencies. But this kind of circuit will only boost bass at a fairly narrow range of frequencies. If that's what you want it can be built using a Sallen-Key topology with a single opamp.
Here's an example online calculator - Sallen-Key High-pass Filter Design Tool
If you want a broad range of bass frequencies boosted then perhaps you want a shelving filter.
Here's an example online calculator - Sallen-Key High-pass Filter Design Tool
If you want a broad range of bass frequencies boosted then perhaps you want a shelving filter.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.