Question for Hamiltoe

swampfox

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do you have to use the 4 "c" batteries and is there another option like a 9 volt? Also i've built twocams ,do you think i would have trouble building your board myself? i can solder ok.
 

hamiltoe

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swampfox,
You can use any battery source ranging from 5 to 10 volts.  However, the higher the voltage, the more current draw though the walk test LED.  The current limiting resistor for the LED was designed for 6 volts.  The life of the LED can be reduced if you use higher voltages, but it will work OK.  You can use a 9 volt battery, but the battery life will be reduced from well over 1 year (using 4-C's)  to around 1-2 months.  The calculations are based on room temperature, so cold weather would reduce the time some.  If you want to use a 9 volt battery and also have extended battery life, you can replace the quad op-amp (LM324) to a cmos version (LMC660 or LPC660 or TS27M4AIN) that is pin for pin compatible and will significantly reduce battery consumption.  I think the cost for the cmos chips are around 2 to 4 dollars from mouser or radioshack.  The RS part numbers for the LMC660 is 900-6330 and the LPC660 (mil spec/cold weather version is 900-6331).

The key to assembling my board is good soldering skills.  You definitely need a soldering iron with a small pen style tip and it should not be over a 20 watt iron.  I include clear and easy instructions...so I've been told.  I had a couple of people order the boards who did not have any soldering experience and they seemed to assemble them OK.
 

swampfox

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one more thing. the cb1a kit does not include the trumeter 7016 counter. is that correct? i dont think i would need it.
 


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