Thanks Dee2eR for a great product! Worked straight out of the box for me! Now for the enjoyment of adding ROMs to my SD Card lol... When I get some more money saved up, I will buy another one for my vertical cabinet!
One little thing that I've noticed. Upon boot up, I will get a yellow lightning bolt appear on the screen. I've checked the voltage coming out of my psu and it's reading 5v, my guess is my psu might not be supplying enough amperage. I'm thinking that I might just power the Pi with the micro USB adapter I have. Any ideas?
Loving my new RaspberryJamma!
Moderator: dee2eR
Re: Loving my new RaspberryJamma!
Hi Guyton, glad you're enjoying it.
If you have a Pi3 you'l probably want to run you r5v at 5.1v to 5.2v as the Pi3 is 5v greedy (official power supply for Pi3 is 5.1v). It's best to measure it at the jamma edge rather than at the power supply to account for drop over the wiring. If you only see the lightning bolt very occationally it is probably fine but if you're seeing it all the time it will effect the performance of games, although depending on what you play it may not be too noticable. Any arcade power supply should have plenty of power to run a Pi3, most are rated at at least 10A on the 5v, Pi3 is rated at 2.5A but in actual use will rarely need more than 1A unless a lot of USB devices are used.
If you find you cannot get adequate current the likely problem will be your wiring, a lot of very cheap modern JAMMA looms have inadequate power wires (and grounds) which appear thicker than the other wires only due to a thicker insulation and not due to more wire. If this is the case you can fix it by adding more wires for 5v and ground to your JAMMA loom.
Do not power the pi from a sepperate power supply while running it in a JAMMA cab unless you remove the fuse from the RaspberryJAMMA to stop the 2 different power supplies potentially causing issues.
If you have a Pi3 you'l probably want to run you r5v at 5.1v to 5.2v as the Pi3 is 5v greedy (official power supply for Pi3 is 5.1v). It's best to measure it at the jamma edge rather than at the power supply to account for drop over the wiring. If you only see the lightning bolt very occationally it is probably fine but if you're seeing it all the time it will effect the performance of games, although depending on what you play it may not be too noticable. Any arcade power supply should have plenty of power to run a Pi3, most are rated at at least 10A on the 5v, Pi3 is rated at 2.5A but in actual use will rarely need more than 1A unless a lot of USB devices are used.
If you find you cannot get adequate current the likely problem will be your wiring, a lot of very cheap modern JAMMA looms have inadequate power wires (and grounds) which appear thicker than the other wires only due to a thicker insulation and not due to more wire. If this is the case you can fix it by adding more wires for 5v and ground to your JAMMA loom.
Do not power the pi from a sepperate power supply while running it in a JAMMA cab unless you remove the fuse from the RaspberryJAMMA to stop the 2 different power supplies potentially causing issues.
Re: Loving my new RaspberryJamma!
Hey, just wanted to give you an update and help grow this forum.
Yes, the wiring seems small. I was going to wire it all up again with a new Jamma harness, but then I thought to myself... maybe I should check the voltage at the board instead of at the power supply?
So with my trusty multimeter, I checked the voltage and it was lower than the reading at the power supply (probably because of the smaller wiring) so with my meter on the board at the jamma connector, I cranked up the voltage to 5.2v and problem is gone!
Yes, the wiring seems small. I was going to wire it all up again with a new Jamma harness, but then I thought to myself... maybe I should check the voltage at the board instead of at the power supply?
So with my trusty multimeter, I checked the voltage and it was lower than the reading at the power supply (probably because of the smaller wiring) so with my meter on the board at the jamma connector, I cranked up the voltage to 5.2v and problem is gone!
