| Index > teleproject > v3 of the PCB | |
|---|---|
| Author/Date | v3 of the PCB |
| memecode 29/07/2024 11:11am | I realized that v2 of the PCB had run out of pins for the pickup/keyboard switch and an LED for status. So back to the drawing board. To get more pins I'd have to change the muxing from 2 x 16 to 4 x 8. Fortunately there are 4:1 mux chips so I redid the schematic and rerouted a new PCB:
 So that's been fabbed and shipped, along with an order for the new 4:1 mux chips. This board also has a 2x4 header for the NRF wireless board and it's also a little smaller to actually fit into the guitar body's battery box slot. I should really get back to the woodworking side of things. |
| memecode 06/08/2024 8:15pm | The v3 PCB's arrived and here's a size comparison against v1:
 The chips on the right are the new 4:1 muxers that I need for this new design. Ie U1-U4. This new board also adds NRF wireless support, a RGB LED and a switch input. |
| memecode 12/08/2024 9:35am | Last week I assembled one of the new v3 PCB's and put all the headers on it. Then started testing the functionality. So far I've got the LED working. Although I can't use all the available colours. Like white doesn't work and yellow (red + green). I think because the way I've setup the circuit doesn't allow enough current to flow. Maybe I should have 1 resistor per component? Anyway, red, green, blue and teal (green + blue) work so that's something.
And this morning I also tested analog input and bank switching. And while it had some problems initially, it is now working correctly. The last part of the testing and verification is the NRF wireless support. Should just be a matter of bringing in the existing code that worked before. But seeing as the circuit is now part of the PCB, I'll need to check all the pinout values and just make sure it IS working. The goal being to read the analog values, put them in a wireless packet, send it over to the receiver and have them available on the PC side. |
| Reply | |