The Raspberry Pi Thread [4]

  1.    #841

    Adafruit order arrived. =) Time to heat up the soldering iron.
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  2. caperjack's Avatar
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       #842

    alphanumeric said: View Post
    Adafruit order arrived. =) Time to heat up the soldering iron.
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  3.    #843

    Power supplies, namely the lack of them, has been an issue for me lately. I bought one of those 5V 4A power supplies with the barrel connector, 5V 4A (4000mA) switching power supply - UL Listed ID: 1466 - $14.95 : Adafruit Industries, Unique fun DIY electronics and kits and a Y splitter, 2-Way 2.1mm DC Barrel Jack Splitter Squid ID: 1351 - $2.95 : Adafruit Industries, Unique fun DIY electronics and kits and a couple of these, 2.1mm DC Barrel Jack to Alligator Clips ID: 1328 - $1.95 : Adafruit Industries, Unique fun DIY electronics and kits I just cut the alligator clips off and soldered the wires to the Proto Zero in my Pirate Radio. I can now run my Pirate Radio and my portable weather clock (recharge the battery) off of the one 4A power supply. I was wanting these, breadboard friendly barrel jacks, Breadboard-friendly 2.1mm DC barrel jack ID: 373 - $0.95 : Adafruit Industries, Unique fun DIY electronics and kits but they were out of stock. And didn't they go back in stock right after I placed my order. I wanted at least one for the Google AIY board. I'll use one of the pigtails until my next order.
    Also bought a 4 way splitter, 4-Way 2.1mm DC Barrel Jack Splitter ID: 1352 - $4.95 : Adafruit Industries, Unique fun DIY electronics and kits My plan is to use that with my 5V 10A power supply to drive up to 4 of my Pi related devices at one time when I'm out on my deck. That's my plan anyway, when I know I'm going out for the evening to relax I'll take my Pirate radio out, and my portable weather clock (no point running on battery when I don't have to), and what ever else I'm tinkering with. Already have the 10A power supply, and so far have only ever used it with my breadboard rig. 10A will drive a lot more than just that. Less stuff to carry in and out of the house and less clutter on my table.
    Didn't order a Pi Zero this time. Ordered some more of the white Pi foundation cases though. I've got 7 or 8 Zero W's now with a couple sitting there doing nothing so I got some cases for them so I can do something with them. Not sure what, but I'll get to them eventually.
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  4.    #844

    Started working on the rovers today. I drilled all the holes I need for mounting stuff. I had to reposition the casters, moving them father forward, makes it less tippy. Some of the pictures show them in the stock position, didn't feel like taking new pictures.
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  5.    #845

    Then I mounted my Pi Zero W's in the new cases. I prefer to drill out the mounting tabs and use nuts and bolts to hold them in. On something like this anyway. I used those black nylon ones that come in that kit Adafruit sells. I have tones so may as well use them for something. More than strong enough for something like this. I used female header going out the bottom. They mate to a 90 male on the mini hack3r board. That puts them facing forward. I can then put a camera in if I want and it will be facing forward. The Proto Zero's will have the PowerBoosts mounted to them and buttons for power and shutdown wired to them. That's for another day I think. Backs getting sore so time to take a break. The batteries will go right at the back behind the Explorer pHat and right over the rear wheels. That will get the weight more over the back wheels and also help it not be so tippy. The occasionally tipping over when they bump into something was why I wanted to go with four wheels instead of two and the caster. They aren't to bad actually on the floor. Useless outside though.
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  6. caperjack's Avatar
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       #846

    you have been busy ...nice
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  7.    #847

    I did most of the soldering last night while chilling out on my deck. Then some of the mechanical stuff this morning. I might tinker with it again latter on. I'm back to wiring and soldering now.
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  8.    #848

    Did a little more soldering today. Mounted the PowerBoost's to the Proto Zero's. And soldered in the barrel jack pigtails. I have two 5V 3A power supplies with barrel jack connectors. They will plug into the pigtails to feed power to the PowerBoost to recharge the battery and supply power to the Pi via the PowerBoost. I'm not all that fussy for using the Micro USB power jack. Especially if I give these to the grand kids. I just know sooner or latter the plug or the jack on the PowerBoost is going to get mangled when they try to plug in the power supply and get the jack upside down. Its a PITA to get at with my setup anyway.
    It may be hard to see but the pigtail exits out the back next to one of the wheels. I have wire ties holding it for now. I couldn't find my small zipties. The Proto Zero is going to be in and out a few more times anyway. I'll ziptie it when its all finished.
    I still have to wire up a switch to the PowerBoost Enable pin so it can be turned off manually. I don't want to leave it running when all I want to do is recharge the battery. I also need to wire up a shutdown button for the Pi. I had some of those little rubber feet for the Pi Zero cases left over. I put two on the bottom of each PowerBoost as they straddle over the explorer phat GPIO contacts. That keeps it nice and level and no worries of it shorting out. I wanted as much free space as possible on the Proto Zeros for wiring up my buttons. Extending the Power Boost out over the end gets me that. It will also make plugging in the battery easier, it moves the JST jack farther towards the back of the rover.
    I'm going to use a black diffuser as a top cover. If I can I may mount my buttons switches up through that? I have to look though my stock to see what switches I have and if it will work. The other option is to lay them down and pointing out the side under the cover. That's for another day though. Taking a break from it for now.
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  9.    #849

    Wired up my shut down button and powerboost disable button. I'll have to make some notches in the diffusors for finger access. They are nice and flush with the Proto Zero and won't catch on anything. No accidentally pressing one either. Was scratching my head for bit when my disable switch didn't turn off the powerboost. I eventually figured out it was because I didn't have the Proto Zero plugged into the GPIO header. The grounds weren't all common (not all connected together0 doah. Also had to modify my battery JST plugs. The keyway on the top was too wide to fit in the jack on the power boost. I just dremelled it flush. Even without it you can't plug them in upside down so no big deal really. I got the blue power boost led when I switched my disable switch to enable. Charge indicator lit up too. Going to let the batteries charge up for now. I have to zip tie the batteries down, getting sore so taking a break.
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  10. caperjack's Avatar
    Posts : 4,182
    insider build 10586.3 win10 pro 64
       #850

    alphanumeric said: View Post
    Wired up my shut down button and powerboost disable button. I'll have to make some notches in the diffusors for finger access. They are nice and flush with the Proto Zero and won't catch on anything. No accidentally pressing one either. Was scratching my head for bit when my disable switch didn't turn off the powerboost. I eventually figured out it was because I didn't have the Proto Zero plugged into the GPIO header. The grounds weren't all common (not all connected together0 doah. Also had to modify my battery JST plugs. The keyway on the top was too wide to fit in the jack on the power boost. I just dremelled it flush. Even without it you can't plug them in upside down so no big deal really. I got the blue power boost led when I switched my disable switch to enable. Charge indicator lit up too. Going to let the batteries charge up for now. I have to zip tie the batteries down, getting sore so taking a break.
      My ComputerSystem Spec


 

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