ESP8266 datasheet What to connect where to get a similar experience to programming an Arduino – with automatic boot selection of the ESP8266 chip to enable flashing and then re-booting into run mode after programming when using a USB-Serial adapter such as FTDI, CH340, CP210x, FT232RL etc. Note that some adapters have a selectable 3v3/5v …
Datasheet Just notes to ensure I know it can be triggered simply with 5V and doesn’t need any external circuitry to make it work.
How to use GPIO2 for input (with a signal that is high by default or low by default while the chip is booting) or output (whether the output is driven high or low to trigger). Booting requires GPIO2 to be high but pulling-up disables it for various uses – especially detecting a high input signal …
NPN – eg 2n3904, 10k on base, 1k on collector Use when the IO-pin has to be up by default PNP – eg 2n3906, 1k on collector Use when the IO-pin has to be down by default, eg IO2 on ESP8266 for boot conditions Make some notes about what happens, and some code for an …
My USB-C charging and headphone socket had become unreliable. I look after my phones and have never broken, loosened or otherwise adversely affected a charging socket before but had to assume that’s what had happened because it was difficult to charge (long leads that put a bit of weight on the connection would fail part …
Priority Symbol 1 ++ 1 — 1 () 2 ! 2 (typecast) 3 * 3 / 3 % 4 + 4 – 5 <, <= 5 >, >= 6 ==, != 7 && 8 || 9 all assignment operators One restriction on the switch expression is that it must evaluate to an integral type (int, char, short, long, long …
Is it just me or are resistors (especially 5-band variety) hard to orientate (left-to-right) so that reading the right code is straightforward? For years I’ve been throwing resistors into a pot on my bench when I remove them from a breadboard because, at the price, it’s easier to take a known value from a drawer …
Make a board as per these PDFs Make aluminium bits to secure PSU. Mount the PSU in the wooden board. 3D Print fuse holders as per this STL Mark copper strips as per this DWG and these photos Drill 1.5mm holes from the marked side Drill 3mm holes in the 12mm pieces – slowly so …
A light switch that can be incorporated into a 2-way household switching circuit to add WiFi control while leaving the existing switching working in a way that requires the user to have no knowledge of the WiFi switch and allows installation using wiring conventions that are recognisable to anyone familiar with traditional 2-way switches. Troubleshooting …
The adapter I used was one of these Start by removing the side panels from either side of the radio. Insert a pry tool and pull towards yourself as it goes in The panel will pop off forwards Then unscrew two side screws from within the plastic mount for the radio unit And the same …