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Velleman MK179

Completed Kit
Completed Kit

This is the Velleman MK179 Proximity Card Reader, which is supplied in kit form. In the image above you can see the completed kit, the read coil is etched onto the black PCB on the left. Bringing a recognised card close to the coil operates the relay on the main PCB for a programmable amount of time.

Main PCB
Main PCB

Closeup of the main PCB, 12v DC input at top right. Left IC is an LM358 dual Op-Amp, the IC on the right is a PIC12F629 with Velleman’s custom firmware.
Logic power is supplied to the ICs & the oscillator from the LM7805 regulator at the top of the PCB. The relay is a standard 15A SPDT 12v coil relay, with the switch contacts broken out onto the screw terminals on the left.

Schematic Diagram
Schematic Diagram

As it is not provided with the kit, unlike other Velleman kits, here is the schematic for this.

 

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Co-Op Bank Card Reader

Keypad
Keypad

This is a little security measure you get with Internet Banking with the Co-Op, generates codes to confirm your identity using your bank card. About the size of a pocket calculator, this is the keypad & screen.

Card Slot
Card Slot

The rear of the unit, the card slots into the top, manufactured by Gemalto Digital Security.

Card Contacts
Card Contacts

Outer back cover removed, showing the 8 contacts for the chip on the bank card, the 2 contacts below that switch on power when a card is inserted. Power comes from 2 lithium coin cells in the compartment on the lower left.

PCB Rear
PCB Rear

PCB removed from the casing, showing the internal components. Two large pads at top left are battery connections, while the only IC on the board is the main CPU, under the card connector. 6MHz oscillator & 32Khz crystal on board for processing & timekeeping. LCD screen connection at far right.

Keypad Contacts
Keypad Contacts

Reverse side of the PCB, with the keypad contacts. LCD on right, with programming interface pads at side of keypad.