We will be attending Prototype Rails on January 6-8, 2022, in Cocoa Beach, FL. If you’re in the area, or already planning to attend, please take in some great clinics and stop by our tables and say hi. Hope to see you there! Note: Shipping of orders received Jan 5-17 may be delayed. Normal operations should resume Jan 18.

Electronic Hobbyist

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16-Channel I2C Relay Board Driver

16-Channel I2C Relay Board Driver

The I2C-RELAY16 is designed to piggyback on commonly available, Chinese-made, boards with 16 SPDT re..

$20.00

40-Channel I2C Digital I/O Expander

40-Channel I2C Digital I/O Expander

The I2C-XIO is a 40-channel digital I/O expander with an I2C interface, based on the NXP PCA9698.&nb..

$70.00

Breakout Board for LTC2990

Breakout Board for LTC2990

The LTC2990 is a Quad I2C Voltage, Current and Temperature Monitor from Linear Technology. It is onl..

$10.00

Breakout Board for LTC2997

Breakout Board for LTC2997

The LTC2997 is a Remote/Internal Temperature Sensor from Linear Technology. It is only available in ..

$10.00

Dual Channel Optoisolator

Dual Channel Optoisolator

Used for providing isolation between a variety of control systems, such as DCC stationary decoders a..

$5.00

ISE AVR Programmer

ISE AVR Programmer

The ISE AVR Programmer is a simple USB programmer for AVR microcontrollers.  It is based on the..

$15.00

Qwiic-Compatible 16-Channel I2C Relay Board Driver

Qwiic-Compatible 16-Channel I2C Relay Board Driver

The I2C-RELAY16-QWIIC is a Qwiic-compatible relay driver board designed to piggyback on commonly ava..

$20.00

TrainSpotter

TrainSpotter

"I was having problems with the sensors for my grade crossing flashers... As soon as I replaced th..

$19.00

TrainSpotter with Remote Sensor

TrainSpotter with Remote Sensor

"I was having problems with the sensors for my grade crossing flashers... As soon as I replaced th..

$25.00

TrainSpotter with Right-Angle Sensor

TrainSpotter with Right-Angle Sensor

"I was having problems with the sensors for my grade crossing flashers... As soon as I replaced th..

$19.00

Reflective Infrared Proximity Sensor with Qwiic Connector

Reflective Infrared Proximity Sensor with Qwiic Connector

This device is a simple infrared proximity sensor with a 3.3V compatible I2C interface.  It is ..

$10.00

Single SPDT Relay Module - 12V Coil

Single SPDT Relay Module - 12V Coil

Single SPDT relay for controlling higher-power loads.  12V coil voltage.Input ConnectionsDC+&nb..

$9.00

Single SPDT Relay Module - 5V Coil

Single SPDT Relay Module - 5V Coil

Single SPDT relay for controlling higher-power loads.  5V coil voltage.Input ConnectionsDC+&nbs..

$9.00

12V / 1A Power Supply

12V / 1A Power Supply

AC power adapter.  Can be used to power many devices including:SoundBytes sound modulesIowa Sca..

$20.00

XBee to USB Interface

XBee to USB Interface

This board is an interface between an XBee module and an FT231XS USB UART.  Originally des..

$40.00

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