Electrical & Computer
Circuit Lab
Ohm's law and Kirchhoff's laws, made tangible. Adjust the source voltage and the resistors and the circuit re-solves instantly: node-A voltage, the current through each branch and the total power. It's not a lookup — the network is solved by genuine nodal analysis (a conductance matrix run through Gaussian elimination), the same method used in SPICE, so the numbers are exactly right.
6.55 V
Node A
54.5 mA
Source current
32.7 mA
Through R2
0.65 W
Power
I(R1) 54.5 mA · I(load) 21.8 mA — current splits between R2 and the load at node A.
Increase R1 or drop the load and watch node A sag — the divider equation and Ohm's law, made visible. Solved by real nodal analysis.
How to use this simulation
Ohm's law and Kirchhoff's laws, made tangible. Adjust the source voltage and the resistors and the circuit re-solves instantly: node-A voltage, the current through each branch and the total power. It's not a lookup — the network is solved by genuine nodal analysis (a conductance matrix run through Gaussian elimination), the same method used in SPICE, so the numbers are exactly right.
Everything runs in your browser — no sign-up, no download. Change a value and the result updates instantly, so you can build a feel for how each input shapes the outcome. It pairs with Crameleon's practice exams and step sheets when you want to go from intuition to working the problems.