How can I control 170 small 6V bulbs with MOSFET outputs (PWM dimming)

How can I control 170 small 6V bulbs with MOSFET outputs (PWM dimming) - Printable Version

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How can I control 170 small 6V bulbs with MOSFET outputs (PWM dimming) - hwang - 01-30-2026

Hi everyone,
I am building a lighting control system for about 170 mini incandescent bulbs.
Load

Bulbs: 6V, 0.2A each
Total: ~170 bulbs

Hardware Plan
I plan to use multiple Kincony KC868-A32M (32-channel MOSFET output controllers) to get enough channels.
Wiring Idea
I want to use a common +6V bus and low-side MOSFET switching:

Code:
+6V bus → bulb → MOSFET output → GND

All controllers and the 6V supply will share a common ground.

Questions

Is this the correct wiring method for KC868-A32M outputs?
Can these MOSFET channels support PWM dimming for incandescent bulbs, or only ON/OFF?
What is the best way to control multiple KC868-A32M boards from a PC (LAN/MQTT/Modbus)?
Any important power or wiring concerns for a 170-bulb system?

Thanks for any advice!

RE: How can I control 170 small 6V bulbs with MOSFET outputs (PWM dimming) - admin - 01-30-2026

1. mosfet output 12-24v, not suitable for 6V. if you want 6v load, suggest you chose relay controller.
2. mosfet output can't output PWM.

RE: How can I control 170 small 6V bulbs with MOSFET outputs (PWM dimming) - yosetadi4321 - 05-12-2026

The wiring idea is mostly correct for low side switching, but the KC868 A32M is not suitable for 6V loads. You may need a different driver or relay solution depending on whether you only need ON/OFF or PWM control.

RE: How can I control 170 small 6V bulbs with MOSFET outputs (PWM dimming) - zali - 07-04-2026

There must be analog output controller or pwm controller for this job. Have you consider using ws2812 or equivalent LEDs for this job. You control 100s LEDs very easily.
Attached is example of stirlight where you only need 4 wires to control 100s or sets with few lines of code. You can however use kc board control on/off colour chang and intencity change if you will.

best regards
Zali