RPi+Piface+Wiegand reader tutorial is missing diagrams

[systeemgod]

Hi,

I want to build a setup as described in the tutorial, however the wiring diagrams seem to be missing (e.g. the 'wiring everything' section). Do you have these diagrams or images available somewhere?

Nico

[brianredbeard]

Hope this helps.

The idea is to create a voltage divider which brings the voltage down from +5v to something roughly in the range of +3.3v.

To double check that everything is wired correctly this C program is very useful: wiegand.c. Just make sure you referencing the wiringPi pins, not BCM pins.

[systeemgod]

Thanks for the info!

Nico

On Wed, Jun 6, 2018 at 8:31 AM redbeard notifications@github.com wrote:

Hope this helps.

The idea is to create a voltage divider https://elinux.org/RPi_GPIO_Interface_Circuits#Voltage_divider which brings the voltage down from +5v to something roughly in the range of +3.3v.

[image: wiegand_bb] https://user-images.githubusercontent.com/57542/41020428-af29c95c-6917-11e8-8937-6be76f4a9511.png

To double check that everything is wired correctly this C program is very useful: wiegand.c https://gist.github.com/hsiboy/9598741. Just make sure you referencing the wiringPi http://wiringpi.com pins, not BCM pins https://pinout.xyz.

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[dplicato]

Hi, I found that the diagram were missing at leosac 0.7.0 doc, but they are present at 0.8.0 doc here.

About the hardware it says that are only needed:

1. A Raspberry Pi
2. A Piface Digital board

In the "Wiring everything" section there is no reference to the need of a voltage divider and it seems that is possible to directly connect the 5v wiegand data wires to the piface digital inputs.

Is this correct?

Thank you.

[Maxhy]

Yes that's correct. When using a Piface board/hat you don't need a voltage divider / level shifter. Piface inputs should support up to 5v. Piface Digital manufacture several products so it may be safe to check their documentation first depending the model you are using.

[Uzzi]

Hi Could you help me about https://wiki.geekworm.com/Raspberry_Pi_DIDO_Board and https://ae01.alicdn.com/kf/H1af968b7b7ec4bce83c5e4152c6be2b2z.jpg connections schema diagram? Thank you