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Payments on Willem's Blog

Designing and implementing a (micro) payment system

Monetising my blog with coffee, Apple Pay and Mollie

Mar. 25, 2020
Designing and implementing a micro payment system with an emphasis on simplicity. Read about how I did it in this post.

Online payments are now more important than ever as businesses are disrupted by the COVID-19 virus. It drives my customers to seek new ways to make money online. I designed and implemented a (micro)payment system. This post is about achieving simplicity by solving complex challenges.

The day I killed my LAN

Turned off my local network and went 4G only

July 31, 2017
I killed my office LAN and went 4G only. Saves a lot of clutter, energy and money.

Today I called my provider to quit my office's ADSL internet subscription, I don't need it anymore. I have turned off my local area network and switched my workflow onto mobile internet only. The simplicity and savings actually surprised me so much, that I made blog post for it.

Cash is king, or is it?

The wallet- and cash-less experiment

July 15, 2016
Is the time right to ditch the wallet?

Very often I see men carry a wallet filled with plastic: multiple debit and credit cards plus a bunch of loyalty programs and membership cards. Then, some even top it off with stinky paper money and sticky metal coins! It made me wonder if I can free up one pocket by ditching the wallet?

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Music from the office cabinet - iPhone as a connected music player. Quite the solid rock show in combination with Apple Watch as remote.
Music from the office cabinet - iPhone as a connected music player. Quite the solid rock show in combination with Apple Watch as remote.
iPad Pro + Apple Pencil replacing paper
iPad Pro + Apple Pencil replacing paper
Connecting frontend with backend technology, simple as 1-2-3
Connecting frontend with backend technology, simple as 1-2-3
Developing the user interface using Blink and Inspect Browser on iPad
Developing the user interface using Blink and Inspect Browser on iPad
The iPhone case is large enough to hide cards.
The iPhone case is large enough to hide cards.
Maybe... my next office? ;-)
Maybe... my next office? ;-)
Just like any other iPhone: but this one has an NFC contactless bank card and ID hidden it it!
Just like any other iPhone: but this one has an NFC contactless bank card and ID hidden it it!
The iPhone with case is only slightly thicker.
The iPhone with case is only slightly thicker.
Stacking two plastic cards is easy
Stacking two plastic cards is easy
Charging and listening to music simultaniously using an Apple Lightning dock
Charging and listening to music simultaniously using an Apple Lightning dock
Feeling old already, my trustworthy old local area network (LAN)
Feeling old already, my trustworthy old local area network (LAN)
Designing the coffee cup using Picta Graphic for iPad
Designing the coffee cup using Picta Graphic for iPad
This case allows easy access to the payment card while hiding the ID inside.
This case allows easy access to the payment card while hiding the ID inside.
Time to drink coffee
Time to drink coffee
Interface concept sketches, exploring different options to leave a message and buying multiple cups of coffee
Interface concept sketches, exploring different options to leave a message and buying multiple cups of coffee
Programming on iPad Pro using VIM, Blink and a Linux VPS
Programming on iPad Pro using VIM, Blink and a Linux VPS
Handling payment status updates
Handling payment status updates
Sketched sequence diagram of payment process
Sketched sequence diagram of payment process

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