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EnviroDIY 12-volt Boost Screw Terminal Grove Adapter (Pack of 2)


New for June 2024:  Includes 2 Grove cables (20cm long).

This is a 2-pack of custom 12-volt Boost Screw Terminal Grove Adapter boards, handy for connecting 12-volt sensors with bare wires to a Grove jack on an EnviroDIY Mayfly Data Logger.  These adapters feature their own 12-volt boost circuitry to supply power to sensors that need more current than some older Mayfly Data Logger boards were capable of producing, so it should work on all versions of EnviroDIY boards.  Most frequently used for SDI-12 sensors with bare wires on the end of the cable. Adapter features a 6-pin screw terminal block to connect the following pins: two power, two data, and two ground terminals).

There are 2 solder jumpers on the back of the board that can be used to customize it for different options:

JP1 is used to select between 12 volts output (default) or 9 volts output.  The default option is “open” for 12 volts.  Join the two solder pads together with solder to “close” the circuit and change the boost circuit to 9 volts output.

JP2 can used to connect the two data pins on the screw terminal (S1 and S2) to the same data pin of the Grove jack.  Default setting is for screw terminal S1 to go to Grove pin D1, and screw terminal S2 goes to Grove pin D2.  Change the solder jumper to the S1+S2=D2 position to connect both screw terminal pins to Grove jack pin D2.  (This could be handy for using two 12-volt SDI-12 sensors at the same time since they can share the same data line as long as they each have unique SDI12 addresses.)

For best results, supply 3.3 volts to this adapter board by setting the header jumper on your Mayfly logger’s corresponding Grove jack to the 3.3v setting, and not 5v or 12v.

If you don’t need to generate 12v for high-draw accessories, you should use the regular Multipurpose 6-pin Screw Terminal Adapter.


International orders: The EnviroDIY shop does not ship internationally.

Shipping: The EnviroDIY shop ships your order by US Postal Service Priority Mail. Shipping cost is included in the product price listed.  Please allow 2-3 business days for processing after placing an order.  You will receive an email with the tracking number as soon as your order is shipped.

Payment: The EnviroDIY shop accepts all major credit cards via Paypal; customers do not need a Paypal account and don’t pay any fees.

Backorders: If an item is listed as unavailable, the EnviroDIY shop does not accept backorders. Please check back soon for availability.

Warranty: Stroud Water Research Center warranties products sold to be free of manufacturing defects for 30 days from the postmark shipping date. If your product doesn’t work as expected and you need help troubleshooting, please consider posting questions to EnviroDIY.org/forums. If you are confident in the programming and assembly you’ve done but believe the hardware is defective, please contact mayfly@stroudcenter.org to request a Return Authorization Number. Products should be returned in their original box with the RAN written on the box. Customer is responsible for shipping cost. Following receipt and evaluation, Stroud Water Research Center will either send a replacement product if the original was deemed defective or return the original if it was not defective.

Returns: The EnviroDIY shop will accept return of unused or defective products (see Warranty section for details) for 30 days after the postmark date of shipment. Returns must be authorized and shipped with a Return Authorization Number on the outside of the box; contact mayfly@stroudcenter.org to request an RAN. Returns must be sent in their original shipping box. A $30 restocking fee will be applied to the credit on customer’s payment. Customer is responsible for return shipping to Stroud Water Research Center, ATTN: EnviroDIY, 970 Spencer Road, Avondale, PA 19311.

CA Prop 65 Warning: This product contains chemicals known to the state of California to cause cancer and birth defects or other reproductive harm.

6 in stock

SKU: 12vBoost_Terminal-260000 EnviroDIY Shop