Ramsey Electronics ICI2, Instruction Manual

ICI2 Page 11 

18. Install S2, pushbutton switch, next to R5. 

19. Install jumper JMP2, using a piece of cutoff component lead, to the left 
of S2.  

20. Install R7, 10K ohm resistor [brown-black-orange], above S2. 

21. Install R6, 10K ohm resistor [brown-black-orange], above S2. 

22. Install J4, 2 pin header, above R6. 

23. Install J6, 2 pin header, above J4. 

24. Install J7, 2 pin header, above J6. 

25. Install R8, 10K ohm, [brown-black-orange], above J7. 

26. Install R9, 10K ohm, [brown-black-orange], above R8. 

27. Install J8, 2 pin header, above R9. 

28. Install U2, 68HC908JK1 microcontroller, to the left of S2. Line up that 
notch again. This is the “brain” of the ICI2. This is what learns the different 
buttons from your remote.  

29. Install C8, 0.1 uF ceramic disc capacitor, to the left of U2. 

30. Install jumper JMP1. 

31. Install R2, 1M ohm resistor, [brown-black-green]. 

31. Install X1, 9.8304MHz crystal, above C8. 

32. Install C6, 10 pF, ceramic disk capacitor, next to X1. 

33.  Install C3, 10 pF, ceramic disk capacitor. 

34. Install R3, 4.7K ohm resistor [yellow-violet-red], next to C3. 

35. Install jumper JMP3, above C3. Use a piece of cutoff component lead. 

36. Install C14, 0.1 uF ceramic disk capacitor, above JMP3. 

37. Install R12, 1K ohm resistor [brown-black-red], to the right of C4. 

38. Install R1, 220 ohm resistor [red-red-brown]. 

39. Install Q1, 2N3904 transistor, to the right of R12. Make sure it goes in 
the right way. The flat side faces R12 just like the drawing on the board. 
This drives the speaker SP1.  

40. Install speaker SP1, to the right of Q1. It doesn’t matter which way it 
goes in. 

41. Install R11, 10 ohm resistor [brown-black-black], next to SP1.