ESP8266 ESP-12 minimal stabilized circuit schematic and PCB
With breadboard friendly headers and Wemos D1 mini pin numbers
Designed for battery operation:
MCP1700 or MCP1702 (250mA, 4uA quiescent current)
MCP1825 (500mA, 220uA quiescent current)
VIN: max. 6V
It will also work without the capacitors, but the voltage regulator will be less stable.
You can also solder a...
Some time ago I was searching for a circuit where the **short** push of a button switches on the power to the MCU, and the MCU was able to turn off the power itself.
Because I don't like waiting for the bootloader to power up the MCU to hold the power on.
It's hard to find such a circuit, so I've created this one for educational purposes.
It's similar to the "Mini Pushbutton Power Switch" prod...
A Mini weather station based on ESP-12. Include a BME280 or BME680 sensor chip on board, one or more DS18B20 onewire sensors. It's powered by a Lithium cell, can be for short time directly charged over present voltage input. A LDO with very low Iq included. Comes with voltage measurement for the connected battery. Hardware jumper for deep-sleep and a programming connector (charge the battery if +5...
same board as rev_3, with new layout and smaler PCB
- LDO changed to AP7361C-33ER SOT-223 (1117-3.3 compatible pinout)
- ESP-01/12 changed to ESP-Goofy (look for TheGoofy 2019 Adapter)
- small improvements
- silkscreen fixed
original designed in EAGLE
- board and schematic attached
PCB will be tested next days, before going in production
A ESP-12 IoT controller for RGB LED Stripe 5-12V.
3+1 channels through MOSFET, PWM and dimming functionality.
The MOSFETs can be replaced by NPN Power transistors (input resistors are as THT parts placed, the 10k pull down's not needed.
The 4th channel is a Logic level up-converter (3.3V->5V). Driven by a 2N7002, can be replaced with BSS138 or similar. Note that it's is a very small power output...
So far I have not found an ESP development module which can be inserted to a socket sideways e.g. to save PCB footprint (for use in smaller enclosures) and to increase module density (e.g. in a HPC application / ESP cluster / multi-ESP configurations).
Here is one design I created (feel free to use/modify/improve/etc).
I wish that some day a manufacturer realizes its potential and creates a produc...
I got sick of wiring up ESP-12 on the simple breakout boards to external devices where you needed extra VCC and GND connections. The nodeMcu version have the built in serial and regulator that are not much good for low power.
So this is my alternative, focused around I2C and mainline I/O with VCC and GND close by, as well as options for configuring the reset pin, for wake up and external