©1999 Hamtronics, Inc.; Hilton NY; USA. All rights reserved. Hamtronics is a registered trademark. Revised: 2/4/03
- Page 8 -
Page 1: ...full three digit code is not com pleted within that time period all three flip flops are reset There are 12 momentary functions each using a 4081 ANDgate Nor mally one input of each AND gate is tied...
Page 2: ...ts and solder splashes Note that one hole above U5 is a via used only to make a connection between the top and bottom of the board Nothing is installed in this hole Note also that programming wires wi...
Page 3: ...to dial up a key sequence each time Bear in mind that the key provides useful func tions so consider what you are giving up before you make a decision to opt for a single digit command Unfortunately t...
Page 4: ...mA on circuits up to 15V The Theory of Operation and Programming sections tell more about the default condition and control line terminology If you use the outputs to operate small re lays be sure to...
Page 5: ...the proper frequency You may need to use a 10 1 scope probe for the frequency counter input to keep from loading the oscillator cir cuit The next step would be to check the hexidecimal signals from U...
Page 6: ...the B latch in the TD 2 at power up is off the speaker relay will operate only after the required tone sequence is received for the B function The speaker may be turned off again either by momentarily...
Page 7: ...1999 Hamtronics Inc Hilton NY USA All rights reserved Hamtronics is a registered trademark Revised 2 4 03 Page 7...
Page 8: ...1999 Hamtronics Inc Hilton NY USA All rights reserved Hamtronics is a registered trademark Revised 2 4 03 Page 8...
