Author Topic: Open Source Laser Tag project - ARMada  (Read 40633 times)

Pingvin

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Re: Open Source Laser Tag project - ARMada
« Reply #345 on: April 02, 2018, 03:32:28 AM »
I looked at the characteristics of the NJM2073M chip - it is very similar to the TDA2822
Should work, in my opinion.

But why do you have 10 kΩ resistors instead of 0.1 μF capacitors?
« Last Edit: April 02, 2018, 03:37:27 AM by Pingvin »

duaneb

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Re: Open Source Laser Tag project - ARMada
« Reply #346 on: April 02, 2018, 07:35:44 AM »
I thought it would be a drop in replacement too...  maybe I made a mistake on the passive components?  I'll look at the amplifier tonight... maybe I just need to fix my mistakes and it will work.

duaneb

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Re: Open Source Laser Tag project - ARMada
« Reply #347 on: April 02, 2018, 08:22:12 AM »
Just looked at my photo of the board... the "104" components are capacitors.  I think it's ok, but I will put it on the scope tonight to see what's happening.

The SD card doesn't seem to work yet... I tried installing the bootloader too, but I can't get it to pick up the new .hex file from the SD card.  My SD card socket seems backwards too... the ones I received have the correct pinout, but the card inserts from the other end... I have ordered more from alibaba... hope they are the same design as yours.

Still some issues to troubleshoot.

Pingvin

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« Last Edit: April 03, 2018, 03:08:21 AM by Pingvin »