Like Crocodile Clips and Yenka, but a logic course in your browser
Yenka, from Sumdog Ltd, is a set of educational modelling tools for schools, and its electronics simulator is based on the original Crocodile Clips simulation engine. Yenka Electronics lets students design and simulate circuits from over 150 types of components, analog and digital, including logic gates and 4000 and 7400 series chips, and Yenka Technology adds PIC and PICAXE programming and 3D models. A school buys it once, with no recurring subscription, and can use it on any computer in the school. If that is what brought you here, digiwleea is a free, in-browser alternative with a different angle: you build a computer from the transistor up.
What Yenka (Crocodile Clips) is good at
It is made for the classroom: Yenka Technology is designed for children as young as 10, it simulates as you work so every change shows straight away, and it covers real components from switches and sensors to op-amps and logic chips, with a free trial. If a school wants analog, digital and microcontroller projects in one package, it is a strong choice. (digiwleea is an independent project, not affiliated with Sumdog or Yenka.)
How digiwleea is different
digiwleea focuses on digital logic and on how a computer works, and it runs in any browser, including on phones and Chromebooks. Instead of placing ready-made 7400-series chips, you build the gates inside them from CMOS transistors, then adders, latches, registers, RAM and control logic, and finally an 8-bit CPU that you program in assembly, following a guided 40+ level course with theory lessons and an AI tutor (Wleea). Yenka is the better pick for broad school electronics; digiwleea is the better pick for learning logic and computer architecture step by step.
| Yenka (Crocodile Clips) | digiwleea | |
|---|---|---|
| Focus | Analog and digital electronics, PIC and PICAXE | Digital logic, transistor to CPU |
| Parts | 150+ component types, incl. 4000 and 7400 series chips | Gates you build from CMOS transistors |
| Licence | One-off school purchase; free trial | Free lab and Act I; Premium for the full course |
| Guided course to a CPU | No (a simulator and lesson builder) | Yes, 40+ levels |
No sign-up is needed to start: open the lab and place your first transistor, or read the free theory course. The account (and the AI tutor) are optional.
See for yourself: build a logic gate from transistors in the simulator, then follow the path from sand to an 8-bit CPU.
Open the digiwleea lab →Frequently asked
Is digiwleea a good Yenka (Crocodile Clips) alternative?
Yes, if you want to understand digital logic from the ground up. digiwleea is a free, in-browser simulator with a guided 40+ level course where you build every gate from CMOS transistors and work up to a real 8-bit CPU, with an AI tutor to help.
Is digiwleea free?
The sandbox lab and the first act of the course are free and need no sign-up. An optional account adds the AI tutor and cross-device sync; the full course and expanded AI tutoring are included in the monthly or annual Premium subscription.
Do I need to install anything?
No. digiwleea runs entirely in your browser, on desktop or mobile, and works offline once loaded.