More Motoron motor controllers!

We recently added six new low-power variants to our Motoron line of basic serial motor controllers: four Mxx550 1- and 2-channel versions, as well as 3-channel versions for Arduino (M3S550) and Raspberry Pi (M3H550).

1- and 2-channel micro motor drivers

The new M1T550, M1U550, M2T550, and M2U550 are single- and dual-channel serial motor controllers in a micro footprint. With a maximum motor supply voltage of 22 V, the Mxx550 versions are a great way to control small motors powered by Power Supplies up to 12 V and battery packs up to 12 cells in series for alkaline, NiCd, and NiMH, or up to 4 cells in series for LiPo. These are lower-voltage, pin-compatible versions of the Mxx256 models we released earlier this year, which have a maximum motor voltage of 48 V and can deliver slightly more current but are otherwise almost identical.

Here is the full array of tiny Motoron options, including I²C and UART serial interface versions:

Motoron motor controllers micro versions
	M1T550 M1U550	M2T550 M2U550	M1T256 M1U256	M2T256 M2U256
Control interface:	I²C or UART serial
Motor channels:	1 (single)	2 (dual)	1 (single)	2 (dual)
Minimum motor supply voltage:	1.8 V		4.5 V
Absolute max motor supply voltage:	22 V		48 V
Recommended max nominal battery voltage:	16 V		36 V
Max continuous current per channel:	1.8 A	1.6 A	2.2 A	1.8 A
Available versions with I²C:	headers soldered headers included	headers soldered headers included	headers soldered headers included	headers soldered headers included
Available verions with UART serial:	headers soldered headers included	headers soldered headers included	headers soldered headers included	headers soldered headers included
Price:	$12.49 – $14.49	$15.95 – $17.95	$16.95 – $18.95	$23.95 – $25.95

3-channel motor drivers for Arduino and Raspberry Pi

We also released larger (but still small!), 3-channel versions in Arduino (M3S550) and Raspberry Pi (M3H550) compatible form factors. These again have a maximum motor supply voltage of 22 V and correspond to the 48 V max M3S256 and M3H256 versions we released in 2022. Here is the full line of larger Motoron serial motor controllers, including the even higher-power, dual-channel Motorons in full-size Arduino Shield or Raspberry Pi Hat form factors:

Motoron motor controllers Arduino and Raspberry Pi form factor versions
	M3S550 M3H550	M3S256 M3H256	M2S24v14 M2H24v14	M2S24v16 M2H24v16	M2S18v18 M2H18v18	M2S18v20 M2H18v20
Control interface:	I²C
Motor channels:	3 (triple)		2 (dual)
Minimum motor supply voltage:	1.8 V	4.5 V	6.5 V
Absolute max motor supply voltage:	22 V	48 V	40 V		30 V
Recommended max nominal battery voltage:	16 V	36 V	28 V		18 V
Max continuous current per channel:	1.7 A	2 A	14 A	16 A	18 A	20 A
Available versions for Arduino:	M3S550 assembled kit board only	M3S256 assembled kit board only	M2S24v14 assembled kit board only	M2S24v16 assembled kit board only	M2S18v18 assembled kit board only	M2S18v20 assembled kit board only
Available versions for Raspberry Pi:	M3H550 assembled kit board only	M3H256 assembled kit board only	M2H24v14 assembled kit board only	M2H24v16 assembled kit board only	M2H18v18 assembled kit board only	M2H18v20 assembled kit board only
Price:	$20.95 – $30.95	$34.95 – $44.95	$59.95 – $69.95	$115.95 – $124.95	$59.95 – $69.96	$95.95 – $104.95

The great thing about the Motorons is that you can easily string together or stack multiple controllers, mixing and matching sizes to fit your application. For example, you could use one high-power dual motor version for drive motors on a mobile robot and then add a smaller 3-channel motor controller for additional actuators. This arrangement with three stacked Motorons on an Arduino Uno allows simple control of up to 9 motors:

The common protocol between versions also makes it easy to change motor sizes and to reuse your code between projects. Want to make a bigger version of your first prototype? Just use a higher-power Motoron! Want to make a tiny robot next time? Use a tiny Motoron! Want to… you get the idea.

While the 3-channel boards are designed to stack on Arduinos or Raspberry Pis, they are also easy to use on breadboards:

It may be easy to view the six new Mxx550 Motorons as just lower-voltage versions of the previously available Mxx256 Motorons, but I am especially excited about them because we are able to offer them at a very low price, extending the legacy of the Dual Serial Motor controllers that were among our first products over 20 years ago. We are launching the 2-channel M2T550 and M2U550 at just $15.95, a lower price than the original Dual Serial Motor controller from 2001 (without even adjusting for inflation!).

The chip shortages of the past several years have made it especially difficult to introduce new products and to keep their prices down, but things are finally seeming to get better on that front. You can see in the tables above that the higher-power 2-channel Motorons are much more expensive; those prices are still elevated because we are limited on some critical components we use there and in our other products. We should be able to manufacture plenty of the new Motorons without being constrained in a similar way.

Related products

	Motoron M3S550 Triple Motor Controller Shield for Arduino (Connectors Soldered)
	Motoron M3S550 Triple Motor Controller Shield Kit for Arduino
	Motoron M3S550 Triple Motor Controller Shield for Arduino (No Connectors)
	Motoron M3H550 Triple Motor Controller for Raspberry Pi (Connectors Soldered)
	Motoron M3H550 Triple Motor Controller Kit for Raspberry Pi
	Motoron M3H550 Triple Motor Controller for Raspberry Pi (No Connectors or Standoffs)
	Motoron M2T550 Dual I²C Motor Controller (Header Pins Soldered)
	Motoron M2T550 Dual I²C Motor Controller
	Motoron M2U550 Dual Serial Motor Controller (Header Pins Soldered)
	Motoron M2U550 Dual Serial Motor Controller
	Motoron M1T550 Single I²C Motor Controller (Header Pins Soldered)
	Motoron M1T550 Single I²C Motor Controller
	Motoron M1U550 Single Serial Motor Controller (Header Pins Soldered)
	Motoron M1U550 Single Serial Motor Controller

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