Tomahawk PCB kit

Preamble

I purchased a Tomahawk PCB kit in Talat Din Daeng for 50 baht. Most of the components were supplied, although some maybe missing.

I have no idea what the PCB does. Googling does not reveal any info, nor a circuit diagram.

Photos

Rear of board

Parts list

  1. Switches 12 (complete) + 1
  2. Heatsink
  3. LCD Display
  4. DIN-9 connector
  5. DIN-9 connector (PCB)
  6. DIN-15 connector (PCB)
  7. 4 x bolt standoff/lock nuts
  8. 2 x self cutting screws
  9. 3 Screw terminal Block
  10. 6 Screw terminal Block
  11. 14 Screw terminal Block
  12. L298N
  13. L2033N
  14. 7805
  15. 4 x 9A103J Resistor network
  16. 2032 Flat Battery holder (PCB mount)
  17. 2032 battery
  18. Piezo buzzer
  19. M1l0592L crystal
  20. 32.768 kHz crystal
  21. 10 x black jumper
  22. 6 x 10 µF 16 V electrolytic
  23. 2 x 220 µF 16 V
  24. 10k potentiometer
  25. 9012
  26. DS1820
  27. 7 x 1M 25V ceramic
  28. 140 AEC ceramic
  29. 2 x 33 ceramic
  30. 1 x 10k resistor
  31. 2.54 mm pins
  32. 4 x 2 pin
  33. 11 x 3 pin
  34. 1 x 16 pin (for LCD)
  35. 1 x 16 pin socket (for LCD)
  36. 1 x 22 pin
  37. ICs
  38. 2 x P89V51RD2FN (40 pin) (duplicate)
  39. 2 x 74HC574 (20 pin)
  40. ACD0804 (20 pin)
  41. 2 x MAX 232 (16 pin) (duplicate)
  42. ULN2003 (16 pin)
  43. PCF859 (not on board) (16 pin)
  44. DS1307 (8 pin)
  45. 4N25 (6 pin)
  46. IC sockets
  47. 1 x 40 pin (complete)
  48. 3 x 20 pin (complete)
  49. 2 x 16 (complete)
  50. 2 x 8 pin (duplicate)
  51. 1 x 6 pin (complete)

Miraculously, the components seem relatively complete, there are even duplicates of some IC’s.

There may be a diode missing, 8.7 V.

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