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DUAL 100K MOTORIZED POT

CAT # MPOT-100K 4.5 out of 5 stars(3 Reviews) Write a Review

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Product Description
• Dual 100K linear pot powered by reversible 5Vdc gearhead motor
• Overall dimensions: 25D x 64mm including shaft
• 6mm knurl slotted shaft is 14mm long
• 8 PC pins on pot, single row
• Solder-loop terminals on motor
WARNING: May cause cancer or reproductive harm.
California Prop. 65
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Customer Reviews 4.5 out of 5 stars(3 Reviews)

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DUAL 100K MOTORIZED POT 4 out of 5 stars

Reviewer: from Westlake Village, CA,USA

While this is being advertised as a dual 100k potentiometer the two potentiometers are not completely isolated. They share a common pin. Also, it is not perfectly linear. The B-4 rating is the 2nd to the least accurate of the linear series of potentiometers.

Also, there are two pins that I have no idea how they are internally connected but they share resistances with the two 100k potentiometers. These are pins 1 and 4. Pin 8 is a no connect.

Special note on resistance between pins 1 to 7 and pins 4 to 5. These pins are approximately 50k at full ccw and full cw however they reduce in resistance as you turn the shaft and pass through 0 ohms near the center position.

Other observations:
The motor draws approximately 30 mA during rotation and approximately 40 mA when stalled against the end of travel.
The gear box is a little nosier than I expected but not too bad. It takes approximately 6 seconds to travel one full rotation.

As viewed from the bottom with the knob forward. Pin 1 on the left:
R1 is pin 1 to pin 6 with the wiper on pin 7
R2 is pin 2 to pin 6 with the wiper on pin 5
Pin 8 is no connect
Pin 1 to pin 4 is approximately 95.4k
Resistance between pin 1 to other pins vary as does pin 4 to other pins. I could not include a table because this review format won't allow it.

Overall this is a good deal for the price and having a common pin between the two pots is not a big deal if you intend to use it as a volume control since most stereo outputs share a common ground. I knocked off one star for the poor linearity of the B-4 series. If you want to see charts for the different series you can go to this Bourns site:
https://www.potentiometers.com/pdf/prm16.pdf

23 of 23 people found this review helpful. Do you? Yes No  Certified buyer

Typos? 5 out of 5 stars

Reviewer: from Boise, ID

The comments from Westlake Village were helpful in figuring out the pinouts of this pot.
However, I think there are some typos. The following are connections I observed:

As viewed from the bottom with the shaft towards you. Pin 1 on the left:
R1 is pin 2 to pin 6 with the wiper on pin 7
R2 is pin 3 to pin 6 with the wiper on pin 5

Pin 1 is a center tap on R1
Pin 4 is a center tap on R2

POT-1
1--------------- |
2-------/\/\/\/\/\/\/\/\---------6
7---------^

POT-2
4--------------- |
2-------/\/\/\/\/\/\/\/\---------6
5---------^

13 of 13 people found this review helpful. Do you? Yes No  Certified buyer

Here's what I found on these motorized pots 4 out of 5 stars

Reviewer: from Montrose, CO

I believe these are older ALPs pots, but I did find something similar.
searched aliexpress for Z PRM 100KB-4

https://www.aliexpress.com/item/32853199257.html
https://ae01.alicdn.com/kf/HTB1a4CJoRTH8KJjy0Fiq6ARsXXav.jpg

I verified the pin connections on my parts to match column 4 shown in jpg url above. My pots are both 91K. Can't comment on linearity or other aspects.

10 of 10 people found this review helpful. Do you? Yes No  Certified buyer


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