ZOLB Circuit Lab
Earn a certificate by finishing a challenge
A certificate shows that you built a circuit and wrote the code that makes it work, not just that you watched a tutorial. It is free to claim once you pass.
Step 1
Pick a challenge
Open ZOLB Circuit Lab and choose a challenge. Challenges are available on Premium and VIP plans; some use VIP parts.
Step 2
Build and run it
Wire the circuit and write the Python for it. Your circuit is checked on our server and the behavior is tested in your browser.
Step 3
Pass the checks
Every check has to pass. You get a limited number of tries per day, so read the checks and test before you submit.
Step 4
Claim your certificate
Enter your name exactly as it should appear, then download the PDF. It has a QR code anyone can scan to confirm it is real.
Checking a certificate? How to verify it
- Scan the QR code on the PDF, or open the verification link the holder shared with you. The page tells you whether the certificate is valid.
- Or type the certificate ID into the box below. It is printed at the bottom of the certificate and looks like ZC-AB12-CD34-EF56.
- Valid: the certificate is real. You see what it was awarded for, the date, and the holder's name with some letters hidden on purpose.
- Revoked: the certificate was cancelled and is no longer valid.
- Not found: the ID may have a typing mistake, the holder may have switched verification off, or the certificate may have been removed. Ask the holder for their current link.
Dates are shown in Philippine time. This checker only says whether a certificate is valid; it is not an accreditation or a reference check.
Good to know
- Certificates can be verified by anyone with the link, QR code or certificate ID. A revoked certificate shows as “Revoked”.
- Your name is set when you claim. If it has a mistake, contact support; we keep a record of every correction.
- Challenges can change over time. A certificate always stays tied to the challenge version you passed.
- You need a Premium or VIP plan to take a challenge. Claiming and downloading a certificate you earned does not need a new purchase.