are asynchronous, the controller code’s transmission protocol is bit synced, at the receiver and evaluates the received data for collisions as well as includes evaluation of the received checksum provided from the transmit sensor controller.
I used a small antenna (17cm), pre-formed and purchased on-line, to fluff up my sensor range. Depending on the specifics of the transmitter/receiver used, transmitter voltage, and the loads presented by the transmitter to receiver path, sensor data, for my link was available from up to 150 to 200 feet. Other OOP link-based products or any transmit telemetry set that will replicate, what is essentially a pulse width modulation input string, would increase the available sensor range to portions of, or multiples of a mile.
Those with any questions are welcome to contact me via email.
Parts list:
Receiver | |||||||
Description | Part reference | Qty | Digikiey # | Nnotes | |||
controller | PIC16F676 | 1 | Digikey Stk #: PIC16F676-I/P-ND | other packages available | |||
433MHz | OOP, 5V | 1 | XD-RF-5V | ||||
antenna | 24 ga copper wire | 17cm | |||||
LED | red | 6 | or equivilent | ||||
resistor RPAK | 6-470ohm/w bussed | 1 | or discrete resistors | ||||
resistors | 4.7K | 1 |
Digikey Stk #: |
||||
cap | 10uF | 1 | |||||
regulator | 78L05 | 1 | Digikey Stk #: | optional */not shown | |||
proto/perf board | .1" centers/clad 1 side | - | Digikey Stk #: | as needed | |||
socket | 14pin DIP | 1 | Digikey Stk #: | optional | |||
Xmitter | |||||||
controller | PIC12F509 | 1 | Digikey Stk #: | other packages available | |||
433MHz | OOP, 5V | 1 | XD-FST | ||||
antenna | 24 ga copper wire | 17cm | |||||
regualtor | 78L05 | 1 | Digikey Stk #: | * | |||
sensor | DHT22 | 1 | DHT11 or other equvilent | ||||
resistor RPAK | 4-4.7Kohm/w bussed | 1 | Digikey Stk #: | or discrete resistors | |||
resistor | 1.5Kohm 1/4W | Digikey Stk #: | |||||
diodes | 1N4148 | 3 | Digikey Stk #: | leaded shown, * | |||
cap | 10uF | 2 | * | ||||
proto/perf board | .1" centers/clad 1 side | - | Digikey Stk #: | as needed | |||
up-convertor | 3.3 to 15V | - | XL-6009 optional */not shown | ||||
socket | 8 pin DIP | Digikey Stk #: | optional | ||||
* depending on power source, configuration and or and transmitt voltage requiremnets |
[All images courtesy William Grill]
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Comments
Looks interesting, but . . .
My contact link is: contact
Source code is not posted or
if you will forward me an
Is there a PDF with the
there is no PDF but...I have
Nice project, William. I will
>>> If I understand
There is always a risk of
There is always a risk of
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