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Home » Categories » Electronics

FingerTech tinyESC v2
FingerTech tinyESC v2
  • Description
  • Specifications
  • Operation
  • Videos
  • CAD Files
  • Reviews
  • Related
Wiring Diagram

These are the smallest and lightest motor controllers currently manufactured for RC hobby robotics. They take up very little space but can handle more than enough motor current for your robots.
Version 2.4 now includes backwards-polarity protection - plugging a battery in backwards will not destroy a tinyESC! There is also now protection on the 5V receiver line so that other BECs will not affect the tinyESC - no need to disconnect the red wire anymore!

Check the Videos tab for an introductory video by SparkFun!

- Bi-directional brushed motor controller.
- Ultra-compact and lightweight.
- Undervoltage, overcurrent, overtemp reverse-polarity, and BEC protection.
- Internal BEC (battery eliminator circuit) provides 5V to receiver - no extra receiver battery required!
- Calibrate function allows precision driving.
- Status LEDs for both directions and calibration.

*The tinyESC includes a Battery Eliminator Circuit. If there is no 5V supply present on the robot, this will power the radio receiver from the main battery.  (There is a blocking diode in v2.4, so multiple tinyESC BECs can be run at once, along with one non-tinyESC BEC.  It is still not recommend to run multiple unprotected BECs together.)
*If you are controlling the tinyESC from a powered device (like Arduino, etc), there is now (v2.4) no worry about damaging the tinyESC from higher voltages.
*Includes 0.01uF capacitor.  Solder between motor leads to filter motor noise and voltage spikes.  (Not required for FingerTech Spark motors - they are high quality and do not generate dangerous voltage spikes.)

SERVO Magazine Reviews:

Battery Voltage: 6.5V - 36V
Motor Current: 1.5A continuous (forever).  For robots, usable continuous current is 2.0A.
Max Current: 3A.  For robots though, 5A-stall motors are easily handled by tinyESCs (see Videos tab).
BEC Output: 5V, 100mA (can run other electronics like receivers and other ESCs, but not motors or servos.)
BEC current is reduced for voltage above 8V - see graph: BEC Derating Graph.

Circuit board size: 1.27x1.27x0.41cm (0.5x0.5x0.16”)
Outer heatshrink size: 1.35x1.85x0.48cm (0.53x0.73x0.19”) - calibration pins have been changed from male to female (v2.4) to reduce length and fragility
Weight with wires: 4.5grams (0.16oz)

Currently there are three two known ways to destroy a tinyESC. (So avoid them!) 
  1) Reverse battery voltage.  Not anymore!
  2) Applying battery voltage to the motor outputs. 
  3) Voltage spikes from noisy motors (not using the included capacitor).
      FingerTech Spark motors are not noisy and do not need the capacitor.
Operation -

R/C Stick
Arduino Pulse
Motor Output
LED status
Full Forward
Full Forward
Solid Green
Flashing Green
(+/-10µs deadband)
Either LED Could Flash
Flashing Red
Full Backward
Full Backward
Solid Red
No R/C Signal
No Pulse Stream
Off (Failsafe)
Slow Blinking Red

Calibration - The tinyESC comes pre-calibrated with defaults that match the 1000-1500-2000µs of most radios, but if you wish to change the limits or center position:
1) Plug tinyESC into unpowered radio receiver.
2) Jumper the two tinyESC Calibrate pins with any piece of wire. (see image
3) Power up tinyESC. 
4) Move transmitter stick to high and low limits.
5) Return transmitter stick to center.
6) Remove the jumper. 
    The center position is now “motor off” with full forward and full reverse speeds at the upper and lower limits.
*You may calibrate multiple tinyESCs at once (as in channel mixing).

Reset to Defaults
- To revert to default calibration, do the above steps without moving the transmitter stick at all.

Note for Spektrum users: The Spektrum transmitters do an odd thing with their mixing.  If your motors only run full speed when the stick is in a corner (meaning going straight ahead/reverse is *not* full speed), then you will want to calibrate the tinyESC just like the directions above, but make sure you only move the stick straight up and straight down, not moving the stick sideways at all.  This will give you full speed for forward and reverse!

Is one motor faster than the other?: When calibrating the faster motor, also move the trim on the transmitter up (when you move the stick to the maximum) and down (when you move the stick to the minimum). Recenter the trim lever, center the stick and remove the calibrate jumper. This will limit the top speed of that motor. You may have to try different amounts of trim to get the motors to behave exactly the same.

SparkFun has created a nice introduction video for the tinyESC now that they carry it:

The videos below show a tinyESC running a powerful 22mm diameter motor that draws over 5A stall at 12V.
On the left is 11.1V operation and on the right is 14.8V operation.
- At 11.1V, the tinyESC runs at full power even with over 2.3kg (5lbs) of weight on the wheel. 
- At 14.8V, it takes 2.3kg (5lbs) before overcurrent protection kicks in.  (Remember, that's 5lb per wheel!)


16 Product Reviews - Average rating 5 / 5 (Show All)

Click to review this product

Best ESC on the market

- 24th February 2015

These are the smallest esc's I've ever worked with and they can take a beating. Just got second place with my fairy and antweight because of these. Decently price and great service/support.

An Antweight Game Changer

- 24th February 2015

Unbeatable for ease of use, reliability, size and weight. Incredibly easy to calibrate and diode protection means no more shorting out motor controllers by stupid mistakes. I use a pair of them in Satan's Segway; they nestle up quite nicely, wires and all into an unmodified 2" length of 1/2" NPT Pipe with a Silver Spark.

I have had some issues with self-calibrating during travel, but nothing during an actual match and FingerTech is quick to help with any problems you might have with them!

With you for life!

- 10th January 2014

I just wanted to post that I bought my first two tinyESCs years ago (like 2010) and they have been in a number of bots and are about the only thing that just keeps working! (I have burned through multiple other ESCs in that time!)
Keep up the good work FingerTech!

Tiny ESCs in a 6lber?!

- 22nd August 2013

At the 2013 PA Bot Blast I saw a pair of TinyESCs running a pair of Kitbots.com "1000 RPM motors" in a the 6 pound robot Precipitor. The wheel size was 1.5 inches and I think the battery was a 3 cell Lipo. While the robot didn't do any pushing, the controllers were still working through a full fight: http://youtu.be/J02_8R8-iGo

I would buy them if I build a beetle or ant. No question.

Great product

- 30th July 2012

I really like these speed controllers for both my 1 lb and 150 gram robots. They work great and they're really compact.


- 25th September 2011

I used the tinyESCs on my recent antweights and they worked flawlessly in both of my robots. I couldn't of asked for anything more out these guys. They are by far the smallest esc's you can get for your flea or ant weight. I am very happy with them and plan on using them on my next small robot!

Click to review this product

FingerTech "Gold Spark" 16mm GearmotorFingerTech "Gold Spark" 16mm Gearmotor - 19.05 CAD
FingerTech's Gold Spark motors are great for hobby use and in competition robots such as mini-sumo and line following.  If your application will be close to or exceeding the torque limits listed below, check out our Silver Spark motors.

• The extra-long 3mm shaft is triple-supported internally so that wheels can be mounted directly.
• All-metal spur gear reduction gearhead mated to a Mabuchi FK-050 motor.
• 9 different gear ratios for a wide range of rpm and torque to choose from (see details).
• Only 28grams (0.99oz).

FingerTech "Silver Spark" 16mm GearmotorFingerTech "Silver Spark" 16mm Gearmotor - 23.81 CAD
The new Silver Spark line of motors has the same 16mm diameter as the Gold Sparks, but the gears are a larger pitch. This means less worrying about stripping teeth in your bigger or heavier applications!

• Extra-long 3mm shaft for mounting wheels directly with the option to use a bearing block for support on the wheel's far side.
• Same 11mm face mount pattern as Gold Spark motors.
• All-metal spur gearhead mated to a Mabuchi FK-050 motor.
• 9 different gear ratios for a wide range of rpm and torque to choose from.  One twice as fast, and one twice as slow as the Gold Sparks!
Please note: 22.2:1 ratio not recommended for new designs - this ratio is being discontinued because of unresolvable quality issues.
• Weights from 28 - 32grams (0.99 - 1.13oz). (see details)

FingerTech Mini Terminal Block (pair)FingerTech Mini Terminal Block (pair) - 6.19 CAD
• When you don't want to solder every wire connection, these push-wire terminal blocks are a convenient solution. 
• Easily connect and disconnect up to four 18ga wires to a common connection point.
• Includes one red and one black terminal block for positive and negative (ground) connections.

JST Connector (Female)JST Connector (Female) - 0.95 CAD
• 2-Pin JST-style female connector.
• Wires are 20 gauge, 10cm (4in) long.  12cm including connector housing.
• High quality, high strand count silicon wire used gives higher amp throughput than standard wire of the same diameter. Connectors are plated for greater amp handling.

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Price: 34.29 CAD
27.41 USD 25.25 EUR

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