ATtiny Goes Wireless
In many application areas it can be very handy to be able to control something wirelessly. This circuit shows how an ATtiny microcontroller can be used to switch an appliance on and off remotely with a little help from wireless transmitter and receiver modules available from Conrad Electronic. If needed, it is very easy to extend the project to include additional commands.
Materials
Component list
Receiver
Resistors
R1 = 4.7kOhm
R2,R3 = 10kOhm
R4 = 470Ohm
Capacitors
C1,C2 = 33pF
C3 = 100nF MKT, 5mm
Semiconductors
LED1 = 5mm, red
T1 = BC547C, TO-92
IC1 = ATtiny2313 DIP-20, programmed, Elektor # 110296-41)
Miscellaneous
X1 = 3.6864 MHz quartz crystal, HS49/S case
RX = Receiver module from 433 MHz AM transceiver set, Conrad Electronics # 130428
DIP20 socket
ELEX-1 (UPBS-1) board (1/2)
Transmitter
Resistors
R1 = 4.7kOhm
R2 = 10kOhm
R3 = 470Ohm
Capacitors
C1,C2 = 33pF
C3,C4,C5 = 100nF MKT, 5mm
Semiconductors
LED1 = 5mm, red
T1 = BC547C, TO-92
IC1 = ATtiny2313 DIP-20, programmed, Elektor # 110296-42)
Miscellaneous
X1 = 3.6864 MHz quartz crystal, HS49/S case
S1,S2 = pushbutton, e.g. B3F-1000
TX = Transmitter module from 433 MHz AM transceiver set, Conrad Electronics # 130428
DIP20 socket
ELEX-1 (UPBS-1) board (1/2)
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