![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhJYMZrpnzAlbifN6jGgluZAcB0DiemIHExoLr3c6k1uJK2KehnmLY4Bt0gRywzbntPCi_XVcNSiz1IOKKdemZ2uAIrhArhtikP1PsEpPjIyfTNb5qwx4IA3YGYArNWFRIgSYiz9PKmxb8/s400/minirem_1.jpg)
Made another remote control for my RF light switch. Pretty much the same as before but on a smaller PCB. Also ended up putting it in an old Maxim sample box.
I found a couple of button nubs in my junk box so decided to go with those. Even so I had to raise the buttons with pieces of rubber. A piece of tape keeps the buttons from falling out when the box is opened and also adds some tolerance for misalignment.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiJf2bryQ4Nu-iVYIpyK6Qi25JrFznQsYMZWYhJMAbS4tEBaQM6bFwAkOHMV6u3C_wDzrQgk9MhMOo96CVUELvFQSbpTbPddA5ZejQF0JIQ3Mnp1xHxRsanxrtDsNlv0oLb8AWgeqRAQJk/s400/minirem_3.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEisgcMnL30a9bQ_4SAQu3MmvM8bHwnk2FYxzTEll6NhkWrEvIkNq_RDZNNsiYd__HVJTqRi0OD9RmAlSDz7CJc__VsYbddE3TAkjsniqXWUdgQAyswBXYa4GWsiIbOGGmjTJv1SPKkV8Ag/s400/minirem_2.jpg)
PCB made with PnP Blue, the 12v battery is soldered.
Here it is working:
Board: here
ATTINY13 source: here (set framesize:8, softstack:16 in bascom compiler settings, fusebits configured to 9.6mhz internal OSC)
Parts:
D6, D3, VCCZNR = 5.1V Zeners
R1 = 100ohm 1k
R3,R4 = 2.2k
R5,R7 = 10K
R11 = 10K
Q1 = some small RF transistor (I used MPSH10)
C1 = 1pF
C2= 2pF (these are not critical)
C3 = Trimmer cap ideally 1-5pF
C4= 2200pF
D1,D2 = 1n4148 or similar
L1 = 1uH
L2 = swapped out for 4pF cap
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