Search found 43 matches
- Tue Sep 13, 2016 7:26 am
- Forum: Hardware Help
- Topic: Pi in a PSP
- Replies: 99
- Views: 107743
Re: Pi in a PSP
@othermod I'm not sure to be honest. The trouble I'm having is how to add an RC delay to my circuit with the DPDT switch. It should signal a shutdown, but also cut the power after 45 seconds for example. I'm not too great with capacitors, but I understand the general idea behind RC timers. @Camble ...
- Tue Sep 13, 2016 6:12 am
- Forum: Hardware Help
- Topic: Pi in a PSP
- Replies: 99
- Views: 107743
Re: Pi in a PSP
@Camble This circuit might interest you. That's exactly the circuit I based the EveryCircuit design on. So the reason it has 3 FETs is because I am unsure whether the GPIO pin switches to GND when the shutdown completes, or if it is just pulled to GND with the internal 40kohm resistor. If it's switc...
- Tue Sep 13, 2016 6:01 am
- Forum: Hardware Help
- Topic: Pi in a PSP
- Replies: 99
- Views: 107743
Re: Pi in a PSP
I've just started working on a psp as well and for the power button I was thinking about using the hold switch instead of the power switch for the power button since it's the latching kind. I figured it might be a bit more simple to setup that way. That's what I did initially, and it's definitely t...
- Sun Sep 11, 2016 7:38 pm
- Forum: Hardware Help
- Topic: Pi in a PSP
- Replies: 99
- Views: 107743
Re: Pi in a PSP
@Camble @Helder I've been working on an emergency shutdown button for the banggood power supply on/off circuit. At first, I was thinking about just using a second button, but I have a different option. This turns the dual mosfet circuit into a triple mosfet circuit. It's a latching on/off, with a lo...
- Thu Sep 08, 2016 9:39 am
- Forum: Hardware Help
- Topic: Pi in a PSP
- Replies: 99
- Views: 107743
Re: Pi in a PSP
ugh, I'm stoked to see this. especially after watching wermy do his new video building a gbzero with all customer parts no GB actually being used. I've got a psp shell in my amazon cart ready to buy when we have boards ready to go! :D I'm continuing to work on it, getting closer every day. I got a ...
- Sat Sep 03, 2016 1:11 pm
- Forum: Hardware Help
- Topic: Pi in a PSP
- Replies: 99
- Views: 107743
Re: Pi in a PSP
Okay so I built the circuit in EveryCircuit. Instead of the TX pin and a GPIO pin, one GPIO pin is used both for pulling the n MOSFET high and for issuing the shutdown command. The only thing it's missing is an emergency shutdown after a long button press. http://everycircuit.com/circuit/45752390312...
- Thu Sep 01, 2016 8:06 am
- Forum: Hardware Help
- Topic: Pi in a PSP
- Replies: 99
- Views: 107743
Re: Pi in a PSP
I think you're correct, but the UART TX pin seemed to stabilize at 3.3v after 8-10 seconds, whereas a BCM pin with the gpio-poweroff flag set will stabilize after 5 seconds. Again, I'm not sure about reboots. This may be helpful http://sudomod.com/forum/viewtopic.php?f=20&t=97&start=330#p10970 That...
- Wed Aug 31, 2016 7:53 am
- Forum: Hardware Help
- Topic: Pi in a PSP
- Replies: 99
- Views: 107743
Re: Pi in a PSP
@othermod Good question. I'll have to check. Also, you need to add the following line into /boot/config.txt dtoverlay=gpio-poweroff,gpiopin=22,active_low="y" @Camble Okay I've been reading through the posts, trying to wrap my head around everything. Does the config code only make the GPIO pin go lo...
- Wed Aug 31, 2016 5:30 am
- Forum: Hardware Help
- Topic: Pi in a PSP
- Replies: 99
- Views: 107743
Re: Pi in a PSP
@othermod I originally borrowed the UART pin idea from @Popcorn but we decided using a BCM pin was stable in half the time during boot up. The schematic I've designed to go with the banggood supply is essentially the same as your dual MOSFET setup. @Camble How does that pin (I think it's 22 from re...
- Tue Aug 30, 2016 5:39 pm
- Forum: Hardware Help
- Topic: Pi in a PSP
- Replies: 99
- Views: 107743
Re: Pi in a PSP
I have seen your image and wasn't sure where people got their info but the question I have is will that work with that BangGood power supply I saw you used in your original build? Many people on here use this power supply and if there is an easy way (with a board made) to shut it off that would be ...