A4988 Stepper motor RaspberryPi
We’re using a 42shd0034-20B Geetech stepping motor taken from a 3d printer: We’ll be driving it with an A4988 stepper motor controller. You can pick up five packs of…
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Change i2c address of ina219
Hi everyone, I wanted to use ina219 with pca9685 but they shared the same i2c address 0x4: 0. Luckily, there’s a fairly easy fix for this. All we need to do is solder…
Read postUnable to find a dom node for 19 - Slate.js
Hi everyone, I ran into the following error while attempting to add an image to a slate.js editor today: slate.js unable to find dom node for 19 The solution was to…
Read postString to Color - Avatar Helpers
Hi everyone, A quick post on a helper function I came across for generating avatars. This function generates a random color for the specified string: Thanks to…
Read postAccess to fetch from origin has been blocked by CORS policy - AWS SAM Local
Hi everyone, I’ve been using AWS SAM local lately and ran into a bit of an issue with CORS. It took a looong time to find a solution that worked for all of my local…
Read postAWS SAM Request Extremely Slow - Fix
Hi everyone, I’m currently using AWS SAM CLI with NodeJS and was surprised to find that the requests were significantly slower when run locally. Luckily, I came…
Read postMove Selection to Single Line - Visual Code
Hi everyone, A quick post on how to merge a multiline block into a single line using Visual Studio Code: Simply highlight your code block, press F1, and then type…
Read postthis.query is not a function - error when using promisify with mysql
Hi everyone, I ran into the following error while attempting to promisify my node.js mysql transactions: This took a while to track down but it turns out that I…
Read postOverriding Global Variables - AWS SAM Local
Hi everyone, Today I’ve added local overrides to the global variables in my template.yml file. This was pretty finicky – a lot of conflicting suggestions out there…
Read postGet User Id in Lambda node.js
Hi everyone, A quick post on where to find the user id (sub) in a lambda requested that has been authenticated with a congito authorizer. You’ll be able to find…
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