Degraded
Line output into a mic input
The NUX DM-1X sends about 1.0 V into a karaoke amp input built for around 10 mV. That is 40 dB too hot, so the preamp clips and every hit comes back as distortion.
- Sends
- 1.0 V
- Expects
- 10 mV
- Fix
- Pad, −40 dB
It fits. That does not mean it works.
Zikro checks whether a connection is electrically sound, and gives you the fix when it is not.
Three ways a plug that fits still fails
Connectors are mechanical. Signals are not. These are real pairings from the library, with the verdict Zikro returns and the reason behind it.
Fatal
5 V sensor onto a 3.3 V pin
A 5 V I2C breakout drives its data line to 5 V, and the ESP32 pin it lands on has an absolute maximum of 3.6 V. The header seats perfectly while the pin is being damaged.
- Drives
- 5 V
- Absolute max
- 3.6 V
- Fix
- Level shifter
Broken
I2C with no pull-up resistors
Data on GPIO 21, clock on GPIO 22, ground shared, every wire in the right place. With nothing holding the two lines high, neither can ever rise, so the bus stays silent and the scan finds no device.
- Data
- GPIO 21
- Clock
- GPIO 22
- Fix
- 2 × 4.7 kΩ
Every profile in the device library carries the specs these verdicts are computed from.
How it works
- 01
Pick your devices
Search two real parts: an ESP32 DevKit V1 and a BMP280 breakout, a drum module and a powered speaker. Each one arrives with its ports, conductors and signal specs already modelled.
- 02
Connect the actual conductors
Not boxes and arrows. Tip to tip, sleeve to sleeve, SDA to GPIO 21. The same wiring you are about to build by hand.
- 03
Read the verdict and the fix
One severity per finding, plain language for the mechanism, and a computed part where one is needed: a pad value, a resistor value, a shifter.
Zikro stops where the simulators start.
It does not execute your firmware and it does not run nodal analysis on your circuit. It answers the question those tools assume you have already settled: whether these two things can be wired together at all.
When the next question belongs to a simulator, Zikro says so and hands you over.
- Run the code
Wokwi boots your sketch and shows you what the board actually does.
- Solve the circuit
SPICE computes node voltages and currents across a whole network.
- Validate the connection
Zikro checks the interface between two real devices. That part is ours.
Check the wiring before you plug it in.
Build the connection once in Zikro, read the findings, then go and solder it knowing what will happen.
Check a connection