Archive for the "electronics" Category

Maple Mini – Serial Programming and Upgrading to Bootloader 2.0

My BAITE BTE14-07 Maple Mini clone came with LeafLabs’ original bootloader. I decided to upgrade to Bootloader 2.0 in order to free up some RAM, and take advantage of some of the new features. The procedure looks pretty straightforward, but I ran into some snags. Perhaps the easiest way to change the bootloader in a Maple […]

BAITE Maple Mini Clone – First Look

Recently, I’ve been searching around for inexpensive higher powered alternatives to AVR-based Arduinos. There are several ARM MCU’s available that give a lot more bang for the buck in terms of RAM, speed, flash, and I/O. While I like PJRC’s Freescale-based Teensy 3.x boards a lot, they’re only available from a single source, and use a […]

SkyRC iMAX B6 80W (Fake?) Battery Charger

After reading about the SkyRC iMax B6 Charger on rcgroups, I decided to buy one. I chose a US-based seller, globalexcellent_ltd on eBay, and paid $17.99. The listing claimed that had a max charge power of 50W, and due to the low price, I figured I was getting a clone. I didn’t mind if it was […]

Installing English Firmware on a FAST FWR171

I recently learned that the FAST FWR171-3G is a lower cost clone of the TP-Link TL-WR703N, the only difference being the case. While browsing AliExpress, I found what I thought was a great deal… the FAST FWR171 for only $16. After waiting over a month to receive it, I noticed that it doesn’t have a USB port. […]

Quickie Hack: Turn Your Bicycle Into A Party Machine

I was looking for a way to play tunes while biking the other day, and was too lazy to get out the CAD program and design something to print on my RepRap. Here’s a dirt cheap & quick hack to get some decent quality sound while riding your bike. All you need is 4 zip ties: […]

TL-WR703N: Attaching USB Serial Adapters – FTDI/CP2102/PL2303/CH340G

Although the TL-WR703N has a built in UART, as I have shown in my previous article, it’s rather difficult to access, and is useful as a serial console in OpenWrt. For the support of your own apps, it is far more convenient to simply plug in a cheap USB to serial adapter — this can be […]

RepRap: Printrboard Surgery

After a hiatus of a couple of years, I’m finally starting to get back into 3D printing. One of my Printrboards got messed up when some wires on my hot end shorted. The hot end temperature was no longer reading correctly. Since my other Printrboards all work correctly, I knew that the problem was not […]

Arduino 1.0.5-r2 for AT90USB1286 and Printrboard

It’s been a few years since I hacked together the copy of Arduino-0022 that’s been floating around the web, which lets you compile and automatically upload Arduino code to an AT90USB1286. This made it a lot easier to develop Arduino code for the AT90USB1286, and in particular to easily modify the Marlin firmware for the […]

How to Update the Firmware on a USBasp V2.0

If you buy a cheap USBasp V2.0 ICSP programmer on eBay, chances are, avrdude will give you the following warning message: avrdude: warning: cannot set sck period. please check for usbasp firmware update. While it’s just a benign warning message which can be ignored with no ill effects, it’s still a constant irritant. To get […]

Interfacing a TFT_320QVT LCD/Touchscreen/SD to a Teensy 3.0

I’m working on a project which needs a touchscreen LCD. After searching eBay for a while, I noticed that many vendors were selling basically the same 3.2″ 320×240 TFT with resistive touchscreen and SD card reader. Though there were slight variations in the silkscreens, they all had the same model number – TFT_320QVT. I bought […]