iM881A-XL Breakout Board
Not tested yet, waiting for delivery
Prototyping Board designed for Attiny10 and ADCs. Low power applications.License: Public Domain
Breakout for rfm95 to fit on breadboard for prototypingLicense: CC-BY 4.0
nRFMicro 1.3License: CC-BY 4.0
A prototyping board to fit within a 100 x 68 mm enclosure, including 18650 and 14500 battery enclosure mounting points and solder-jumper isolation from GND + Vcc planes.License: CC BY-NC-SA 2.5 AU
A prototyping board to fit within a 100 x 68 mm enclosure, including 18650 and 14500 battery (GND + Vcc plane), coupled side connection and Pi 0 standoff mounting points.License: CC BY-NC-SA 2.5 AU
A prototyping board to fit within an 85 x 58 mm enclosure, including 14500 battery mounting points with solder-jumper isolation from GND + Vcc planes.License: CC BY-NC-SA 2.5 AU
The board is designed to measure the battery level (voltage) with an uC's ADC. The on-board voltage divider must be parameterized (R1 and R2) according to the uC's max ADC input as well as the battery's voltage level. The battery voltage may be higher then the ADC's Vcc.
The circuit includes two MOSFETs to cut-off the voltage divider in order to not drain the battery when not in use. The uC must pull up EN to activate the voltage divider. If EN is left floating (e.g., the uC is turned off or in deep-sleep), the on-board pulldown resistor cuts of the voltage divider.License: CC-BY 4.0
Halogen strip lighting or undercabinet lighting sometimes uses G4 bulbs. If converting to LED you may want to use multiple bulbs in one socket to increase the load on the power supply in order to prevent flickering or to increase the light output. This adapter plugs into each halogen socket and provides two female sockets for two LED G4 bulbs. The pins and sockets are commonly available 2.54mm spacing female and male header. The male pins on the supply location would be best if they were longer such as 12-15mm.License: CC-BY 4.0
Breakout board for ESP32-CAM enclosureLicense: CC-BY 4.0
Improvement for Andonstar ADSM302 microscope. Switch box for the Andonstar ADSM302 to switch between PC mode and standalone mode. See Elektor Magazine https://www.elektormagazine.de/news/kleine-schaltungen-usb-mikroskop-verbesserungen-folge-25 (German language)License: CC-BY 4.0
A Raspberry Pi adaptor board for the HopeRF RFM95W and comptible modules.
v1.1 No functional changes. Board length reduced to 30mm, with some minor component rearrangements, to match the width of a Raspberry Pi Zero.
A breakout board for HopeRF RFM95W and compatible modules.License: CC BY-NC-SA 2.5 AU
A combination breakout and Raspberry Pi adaptor board for the HopeRF RFM95W and comptible modules.License: CC BY-NC-SA 2.5 AU
MySensors Node RS485
ATmega328 + MAX485 + W25X40 flash for FOTA
D7 pin used for control RS485 DE/RE input.
On long side of board present 11-pin header include:
On short side of board present two pin header include:
Present place to solder pull-up resistors for RES, D2, D3, SDA, SCL signals.
It is also possible to install LED connected between D6 pin and 5V through 510 Ohm resistor.
nRFMicro 1.1License: CC-BY 4.0
This design (a RFM95W controlled by an ESP12F) is intended as direct replacement for the iot_lora_v4.2
board (same form-factor, same interface connector).
The board is tested with the Arduino IDE and the
MCCI LoRaWAN LMIC library mcci-catena/arduino-lmic
IBM LoRaWAN in C (LMiC)
and works perfect.
A second set of PCB designs (power supply/sensor boards) are already designed and tested or planned as
piggyback/hat for this iot_lora_wifi_esp12 board. Power alternatives will be: solar cell, CR2032, 2 x AAA,
supercap. Controlled by: the TPS61291, TPL5111 and/or TPS22860.
1 x RFM95w/868MHz
1 x ESP12F
2 x 10K (I2C pull up)
1 x SMA antenna connector
1 x pin header 2x7
ATTENTION: The update to v1.1: added a reset button for more flash comfort.License: CC-BY 4.0
Minimal breakout board to test and develop drivers for the Cirrus Logic CS5464 Single-phase Energy Monitor ASIC.
Arduino code available here
This is a FeatherWing ideally used with Teensy 3.2/4.0 to drive a high-speed DAC with filtering and signal conditioning using Opamps.License: TAPR