Simple 3D-printed NRF remote - Arduino controlled

Lol well usb power is the only thing left to try :grin:

How would I even do that? Iā€™m gonna try pulling VCC from UART next bc why not

Checking in case has even had the same problem.

Got 3 OLEDā€™s for this, two out of the three canā€™t make them work. Tried all found codes and example and nothing. Using eh arduino i2c scanner for bothā€™s he find them at their address 0x03c but they never work. :expressionless:

Anyone had similar problem?

I had an OLED inexplicably die. Apparently theyā€™re just really sensitive

Iā€™ve used the 168x64 for other projects and they can take some abuse. But seems like that is the answerā€¦ those things just go bad quite easily.

So I spliced the power lead to just behind the micro USB port to feed it power there, and still doesnā€™t boot up properly. I tried it with power from both PPM and UART. Iā€™m at a lost rn. I donā€™t understand why it wonā€™t start up properly

Damn I was hoping for usb to solve this issue :confused:

Take a look at here, seems like they have the same problem https://forum.arduino.cc/index.php?topic=256771.0

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Looks like post #37 has a solution: https://forum.arduino.cc/index.php?topic=256771.msg2359179#msg2359179

a 10uF cap and 470 ohm resistor in series form the reset pin to ground

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Fingers crossed for the method

damn, the electrical engineering parts room just closed :frowning: Iā€™ll have to wait till tomorrow to buy those parts to try it

just hope it works, as soon I get back home I need to try those possible solutions :slight_smile:

So I was bored and I may have found a solution that someone needs to tell me is a bad idea. But bridging the RST and GND pins with my cheap 220uF cap, I get proper startup on some example sketches all of the time. Iā€™ve also got the LC filter wired up to keep some of the noise on the power lines at bay. Can someone tell me why this is a bad idea? :joy: Iā€™ve ordered a bunch of low ESR caps, but Iā€™m curious if this is a viable option too.

ā€œThe benefit of a capacitor between RESET and Gnd is that it will keep the chip in reset mode for a brief period - and hence help with any contact bounce on the power supply.ā€ http://www.societyofrobots.com/robotforum/index.php?topic=3903.0

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That was what I was planning to do as wellā€¦

Edit: tried it on my remoteā€¦ Works!! I used a 100uF 10V cap soldered directly to the pinsā€¦

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Just to add on in case you guys donā€™t read my other threadā€¦

I added an LC filter and a large 1000uF cap to the receiver 5V supply. LC filter smooths out the noise, cap prevents brownouts. The latter I was getting when I tried to ride slowly upslope, I would lose connection (and brakes!!!) and it wouldnā€™t come back till I stopped for a few seconds.

Hmmmm thatā€™s good to know. Iā€™m at my Electrical engineering stockroom right now trying out different capacitors to bridge the Reset and GND pins with. I had success with some .022uF ceramic caps that are absolutely TINY and perfect for size constrained areas like my enclosure. These were the specific ones I plan on using.

https://www.digikey.com/product-detail/en/kemet/C320C223K1R5TA/399-4284-ND/818060

Iā€™m gonna leave my LC filter on the power line too and probably put the 22ouF cap on it just in case after hearing about that.

Where are you shipping from (or ā€˜what are the costs of shipping to the Netherlandsā€™)? Also, what material and color did you print?

IĀ“m shipping from Austria (shipping would cost about 3ā‚¬) :smiley: Its printed in pla and the colour is black. :smiley:

Gotta try and see if a lower uF cap will work. Online it seems mostly 100 to 220uF is used for this.

The .022 uF ceramic cap works perfectly. Itā€™s absolutely TINY and out of the way. now Iā€™ve just gotta fix my remote connection issues again :frowning: