Metal Detector Circuit
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metal detector circuit
How do I know which battery I should use for a metal detector and some motors in a buggy?
I need to power a buggy, with a metal detector attached to it. This metal detector uses 9 volts.
It also contains 4 motors, all with 7.5 volts each.
The weight of the whole thing is about 20kg.
I was thinking about using a parallel circuit for the metal detector and another circuit for the metal detector.
Thank you for your help.
I'd use a single 9 volt battery for the metal detector.
For the buggy, you need a lot of power. I'd start with a 6 volt lantern battery, they are quite powerful. If that is not fast enough, use 5 D cells in series. At 1.5 volts each, that is 7.5 volts. You can also setup a switch to change the speed, with a rotary switch selecting between 7.5 or 6 or 4.5 or 3 volts.
If they die too quickly (I have no idea of the size of the motors) use 2 or 3 in series for each, so you have a total of 10 or 15. At this point, the weight of the batteries becomes significant.
I don't know what you mean by "parallel circuit" ? Do you mean cells in parallel?
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picoDetector : a PIC12 metal detector
What is a comparable transistor to the bc 184b?
I am building the metal detector at http://www.easytreasure.co.uk/bfo.htm and buying the parts at digikey but the transistor suggested isn't available in quantities I'd like to purchase. Could you suggest a comparable part?
I have plenty of experience in constructing circuits for physics labs but not enough knowledge to easily find the part on my own.
Thanks!
The NTE cross reference is the NTE123A, which is a pretty general purpose NPN transistor.
The specs for the NTE123A read just like a 2N2222A. You can get those anywhere.
After studying the circuit... a 2N2222A will do, just fine.
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