Manual PWM dimmer with adjustable frequency and regulation curve 12/24V 30A

Manual PWM dimmer controller, adjustable frequency and dimming curve

For 12/24V single-color LED strips, max. 30A

Dimmer for 12/24V LED strips with adjustable frequency and dimming curve. Depending on the selected frequency option from 300Hz to 10KHz, it will allow to connect a higher or lower load, with a maximum of 30A at the lowest frequency, and a maximum of 10A at the highest frequency.

Why is it important to set the frequency correctly?

Although the human eye does not perceive flicker beyond 100 Hertz, electronic devices, photo and video cameras usually record between 25 and 60 frames per second. That is why, many times, when exposing a point of light to a camera, we observe an unpleasant flicker. The frequency setting as well as the dimming curve reduces this effect to a minimum and allows dimming with a homogeneous light transition from 0.1% to 100% without jumps, without flicker.

Technical parameters

• Operating temperature: -20ºC to 60ºC
• Input / output voltage: 12/24V
• Output: 1 channel
• Wiring connection via terminal strip
• Small dimensions: 90x70x48mm
• Weight: 140g
• Static power consumption: <0.7W
• Output current: <30A

Instructions for using the adjustable frequency manual PWM regulator

1. Select the PWM frequency by adjusting the three pins on the left, marked 1 - 2 - 3
2. Select the regulation curve by adjusting the two pins on the right, marked 4 - 5
3. Connect the input and output load wires according to the V+ / V- instructions, from the power supply and output to the LED strip.
4. Connect the circuit to power, and operate the rotary knob. The minimum brightness is set with the knob to the left, and the maximum brightness to the right.
5. If you turn the knob all the way to the left, you will feel a click and the dimmer will turn off the power.

Considerations to keep in mind

• When the PWM frequency is at the minimum of 300Hz and the maximum connected load is 30A, the temperature of the controller does not exceed 55ºC. When the PWM frequency is between 500Hz and 1000Hz, the controller can reach temperatures up to 65ºC.
• Consider that the higher the PWM frequency, the output current is reduced proportionally, according to the following table:

PWM freq. = 300Hz --> Max. 30A

PWM freq. = 3KHz --> Max. 20A

PWM freq. = 5KHz --> Max. 15A

PWM freq. = 10KHz --> Max. 10A

Instruction manual (in English):