Here are some circuit
boards that I developed that are based on PIC
microcontrollers and have LCD Displays
Exhaust Gas Temperature Display: $100.00
This board was designed for car enthusiasts who wish
to monitor the temperature of their exhaust gas in
order to fine tune their engine’s performance. This
board has 2 TC inputs (type K) and a back-lit LCD to
display the 2 temperatures. The design is based on
the Analog Devices AD595 (type K) Thermocouple
Amplifier and has additional circuitry to enable its
use in automotive applications. The unit can
display either degrees C or F by changing a jumper
on the board.
temperature that can be displayed is 1000 degrees C
(1800 F). This board can be powered from car power
ranging from 12 to 24V DC.
Thermocouples are not included.
Digital Thermostat: $75.00
This board uses a PIC
microcontroller to read the temperature from a type
K thermocouple, display the temperature and control
a 10A relay based on the user-entered setpoint.
When the temperature drops below the setpoint, the
relay activates. The LCD displays the temperature
and the setpoint and is back-lit for low light
range is 32 – 200 degrees F (display of temperature
in degrees C is available on request). This board
can be powered from 7.5 to 24V DC.
Thermocouples are not included. Type
J TC capability available upon request
Digital Current Display: $175.00
I recently installed a whole
house generator on my house to provide power in
the event of a power failure. I was
surprised to find that there was no way to
monitor the power being generated so I never new
how close I was getting to the maximum limit.
So, I built this board to monitor the current on
both legs of power being supplied by the
generator. I also added the feature of
recording the peak loads that can be displayed
and reset at the press of a button. The
current for both legs is displayed on a 2-line
back-lit LCD. The board is mounted in a
nice enclosure and comes with a power supply and two
current transducers that will go around the 2
legs of power being monitored. The maximum
current monitored is 75A per leg (higher
amperages available). Display
resolution is 1A.
Note: These are built to order.
Please allow up to 2 weeks for delivery.