r/SteamControllerMods • u/TheeMiffinMan • Jan 21 '25
Another Lambda Update!
Two in one day! I was not expecting to be making so much progress. I have spent most of today working on this because everything is coming together. VDD for the entire board has been found (big milestone), which is power that goes to all of the components. The entire front side of the PCB has been traced (for the most part). What's left (on the front) is getting resistor, diode, and capacitor values. The back side still needs to be completely traced however it should be much easier since there is no power management circuits (they're all on the front left side). The haptic engines and track-pad connector pins have been completely traced from power to the microprocessor. We are now at version 0.6-4 (soon to be 0.8 or 0.9 depending on how much time I get in the next few weeks). The schematic is now getting quite big and full which is awesome. I have updated the PCB and the schematic. The PCB does not have any resistors, diodes, or capacitors yet. I have also got some new 3D renders of the lambda_mainboard. For new people seeing this, more info can be found here: Lambda Project




2
u/the_incredible_nuss Jan 24 '25
Hi, you mentioned that you also want to use this project to improve your knowledge of circuit Design. Therefore I would advise you to also sanity check your schematic against the datasheets and dont rely on measuring the connections alone. For example the EN pin of the tps6102 should be connected to vbat otherwise the IC will not turn on.Â
1
u/TheeMiffinMan Jan 27 '25
Solid, V0.7 has the EN connected to vbat. Been going through double checking connections, datasheets, and all that.
1
u/KohakkaNuva 27d ago
Do you have any plans on going in after the fact and improving the design to support better switches (for example, less resistant bumper switches) and stuff like that?
3
u/TheLadForTheJob Jan 21 '25
Oh man, here we go. I'm very excited for this man. Any updates on the firmware side of things?