How do you get this to hold programming? After reset/programming and sitting ~30s , it shows an "a" and doesn't work (manual won't work). Ideas?

The 'a' indicates that the timer is locked. The timer auto-locks after 30 seconds. To unlock, you have to press the "C/R" key repeatedly (4-6 times, I think) in 10 seconds. The "a" will go away, and you can program start and stop times or operate manually

Can I use this to control a solar light for my chicken coop? If so, can you recommend a tutorial or specific parts I can buy?

yes it works great for that, I used a solar panel from harbor freight on an old dolly with a used battery (made the entire unit mobile and a quick disconnect to the lights), I wired the solar panel to charge the battery then run wires from the battery to the timer which has been flawlessly working, I kept it all a 12 volt system, I bought 12 volt led lights and wired them to the other side of the timer, I had trouble setting the timer, but you can you tube it and its all there, this has kept my egg production up for sure and it cuts off long enough to give them a good nights sleep

What functions does the manual mode provide. can i push manual and have it close the switch for x minutes like my irrigation controller?

Manual mode just lets you operate the switch in on or off mode untill you change the setting back to auto mode where the timer schedule takes over.

Will this single timer open and close a chicken coop door? I can only get the linear actuator to move in one direction. The a

This is a timer that allows voltage to pass through. You need a control system like a plc to open and close a door. Cheaper to walk out and do it.

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JVR 12V Timer Switch - Programmable DC/AC/Solar Relay

Product ID: 15949035

Details

Brand
JVR
Color
White
Item Weight
68 Grams
Material
Plastic
Product Dimensions
2.36"D x x

⏰16 programmable ON/OFF schedules

💾Power outage memory saves settings

🔋12V DC power for energy efficiency

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Description

⏳ Automate smarter, live freer — your 12V timer for every project!

EFFORTLESS PROGRAMMING - User-friendly LCD screen and clear instructions make setup a breeze—no tech degree needed.
ENERGY SMART AUTOMATION - Operates on 12V DC to optimize power use and reduce your energy footprint.
VERSATILE DIY ESSENTIAL - Perfect for automating everything from chicken coop doors to neon lights and solar systems.
UNINTERRUPTED RELIABILITY - Power outage memory ensures your custom schedules stay intact, no resets required.
PRECISION SCHEDULING MASTERY - Set up to 16 independent ON/OFF schedules for ultimate control over your devices.

The JVR 12V Timer Switch is a compact, programmable relay designed for DC, AC, and solar systems. It supports up to 16 customizable ON/OFF schedules with a timing range from 1 minute to 7 days, powered efficiently by 12V DC. Featuring a user-friendly LCD interface and power outage memory, it guarantees reliable automation for diverse applications like lighting, feeders, and preheating systems. Backed by a 1-year warranty and excellent customer support, it’s a versatile tool for professional-grade home and DIY automation.

Specifications

ASIN	B00WR0ELCO
Battery Life	10 years
Best Sellers Rank	#27,378 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #34 in Plug-In Timers
Brand Name	JVR
Color	White
Customer Reviews	4.3 4.3 out of 5 stars (1,746)
Item Dimensions D x W x H	2.36"D x 2.36"W x 1.26"H
Item Weight	68 Grams
Manufacturer	JVR Online
Manufacturer Part Number	TL34
Manufacturer Warranty Description	Manufacturer warranty for 1 year from date of purchase.
Material Type	Plastic
Model Number	COMINHKPR90865
Number of settings	16
Screen Size	2 Inches
Unit Count	1.0 Count

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C$1870

Duties & taxes included

In stock

Sold byAmazon NicaraguaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Nicaragua.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

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