This board enables you to use own SOT223 like 1117 LDO on breadboard. C1 = 100n, C2 = 10u, R1 depends on LED and output voltage of LDO, choose something like 330 ohms if you do not know how to calculate it.License: CC-BY 4.0
Switch VCC and GND pins can be switched on some i2c pinoutsLicense: CC-BY 4.0
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 lora 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.
v1.2 No functional changes. Board length trimmed to allow it to be mounted immediately adjacent to another board on a standard 100 mil grid and the silkscreen modified to label the pins according to their RFM95W connections rather than their Raspberry Pi connections, these changes to allow the board to be more readily adapted to other, non-Raspberry Pi applications.
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
Breakout board for Ebyte E78 (ASR6501) moduleLicense: GNU General Public License v3.0
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