![]() Specific Questions Only Only ask specific questions regarding a project you are currently working on. Most answers can be found within a few minutes of searching online. Before asking a question - do research on the matter. Questions, help requests, and discussion must be a text postĭo Your Research r/raspberry_pi is not your personal search engine. Other subreddits that may be helpful: r/AskElectronics, r/AskProgramming, r/LearnPython, r/RetroPie Remember that there's a tell part to Show-and-Tell! Don't post pictures of a Pi that don't clearly demonstrate what it's doing or post pictures without any details about your project, you also need let people know what it is, what it does, how you made it, and also answer questions people may have.Īre you looking for ideas? There's a huge list right here!†ĭo you have boot problems, network problems, power problems, stability problems, or your monitor isn't working right? Please click this link and go to the stickied helpdesk thread.†ĭo you have networking problems or you're trying to make your Pi into a router, bridge, or WiFi AP? Try r/HomeNetworking or r/LinuxQuestions ![]() Please, no pictures of unused Pis - do a project! I think this means I’m all good to proceed with the plan.Hi Worglorglestein, here is some information and links that you might find useful! Since that technology is also designed to provide isolation, there’s no connection to an actual earth ground (or even a shared logic ground with the network switch) present. To make things more fun, I’ve decided to power the Pi boards using the PoE ‘hat’ boards from Element14 (same as the ones from the Raspberry Pi Foundation), so the ‘other’ power supply doesn’t have an earth ground either it is also fed from transformer taps, which pull power from the Ethernet cable. Yes, I’m referring to ‘earth ground’, and now I understand that there shouldn’t be any expectation that either of the leads from the transformer would be equivalent to ‘earth ground’ it’s why some transformers have three pins and connect the *actual* earth ground to a third lead, used for safety ground and not logic ground. You are certainly right, out of an abundance of caution (to avoid frying the boards!) I’m being extra-careful □ Is powering the OSPi board in a ‘split’ fashion like this actually safe to do? I’m concerned now that if I plug in a 24VAC power supply and the ‘GND’ lead from that supply is not actually at ground potential, there will be a current flow between that transformer and the USB power supply which is providing its own GND. However, after reviewing the schematic for the 1.43 board, I see that the GND connection from the 24VAC terminal is connected to the single ground net on the board, it’s not isolated from the Pi’s GND net. ![]() I’ve powered up both boards using normal 5V USB power supplies and they boot fine, and the OSPi board LED comes on, so I’m fairly certain all the power connections are in order. ![]() I removed the PTC fuses from both boards (on the newer one it was actually a zerohm resistor, not a fuse), and on the 1.42 board I also removed the adjacent diode and resistor (which were not populated on the 1.43 board), so that the feed back from the Pi’s power supply is not affected by them. The boards work fine off of 5V power supplies independent of the OSPi boards, so I’m pretty sure this the ‘insufficient current’ issue Ray has mentioned on the forum multiple times. I’ve run into the well-known problem that the OSPi board’s 5V power supply is insufficient for these boards they often crash if I push the CPUs hard. Opensprinkler power raspberry pi upgrade#I run other software on the Pis these boards are plugged into, and as a result I want to upgrade them to 3B+ boards for better performance. Both of them have been working fine with the 24VAC transformers that were supplied with them. I have two OSPi boards (one is 1.42, the other is 1.43 or 1.43+, I didn’t check closely). ![]()
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