Where can I find information for a digital wall kiosk to hang up in a Shul to get donations or to pay Shul balances?
I saw that in Israel they have it in almost every shul but in the US I don't see it very often.
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ShulCloud offers such a system.
I haven't seen those in any Israeli shul but it is still a good idea. Some options include
You could also build your own low-cost kiosk by leveraging an old tablet with the Square Reader.
Note that with the prevalence of mobile technology, you might be well served by a mobile donation system. We are planning this for our shul in Israel leveraging Hapoalim's bitpay and Leumi's Pepper Pay. The US equivalent would be Venmo or Paypal.