Description
An unused PCB originally designed for use in the Elemental TEC01a greenhouse controller prototypes. As pictured: Teensy and battery not included. Cost of individual components is roughly $50. Extremely limited quantity remaining.
Features:
- Socketed for Teensy 2.0 from PJRC (Teensy not included)
- (8) onboard Omron GST-1A relays with contacts rated at 5A each
- TD62083 driver for relays
- DS1307 RTC with 32.768KHz crystal and clip for CR1220 back-up battery (battery not included)
- RJ12 RS232C port with MAX232CPE interface driver
- Separate power lines for logic and relay-switched allows relays to control different polarity and/or voltage
Connections:
- X1: 5VDC logic power supply
- X2: relay output power supply
- X3: relay switched lines, right side
- X4: relay switched lines, left side
- X6: I2C peripherals (originally used for temperature and CO2 sensors)
- J3: digital peripherals (4)