Bill
Validator
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Bill
Validator
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Bill Validator This bill validator was designed to validate $1 (US) bills. This device will generate a pulse for the users application whenever a valid dollar bill is fed through the machine. The hardware and software for this product was developed in three months. A high speed 16-bit microcontroller was used in this application to control the bill detection and sampling process. This type of bill validator uses a magnetic pickup to read an imprinted pattern on a bill. The analog signal from the pickup is amplified, filtered and converted to a digital format with an A/D converter. DSP techniques are used to extract recognition information to determine the type of bill and for detection of counterfeit bills. PC based DSP software was used to evaluate the image recognition approach and feasibility before committing to full scale design effort. Future Test used analog design techniques to develop a high gain low noise amplifier for the magnetic pickup. This proved vital in acquiring reliable data from old or washed bills that have lost a significant amount of the print. Digital design and microcontroller design techniques were also used to develop this product. Currently this circuit board is in production of over 5000 units per year. Customer: Proprietary |
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