More than a calculator
Features hidden in plain sight
Solve fractions
Long press the division key to enter a fraction
Draw graphs
Type sin(x) and see the graph immediately
Often sold in bulk packs (e.g., 10 PCS) for professional repair shops. View GYD-9E on AliExpress .
Available under various brand names like WEIHU or generic labels. Check Amazon Listings .
Allows the monitor to control the brightness level. GND: Ground connection.
Protects LED beads from thermal runaway caused by current spikes.
💡 If your display flickers after installation, ensure that the "ENA" signal is a steady voltage (usually 3.3V or 5V) and that your power source can handle the additional 8W–12W load. 🛒 Where to Buy
Unlike simple voltage regulators, the GYD-9E maintains a steady current flow. This is critical for LEDs because:
The is a dual-port constant current driver board specifically engineered for LCD and LED display backlighting. Typically used in 15-inch to 24-inch monitor repairs and retrofits, this component acts as a "step-down" (buck) converter or "booster" depending on the specific backlight configuration, ensuring that LED strips receive a stable, flicker-free current. ⚡ Technical Specifications
Features hidden in plain sight
Long press the division key to enter a fraction
Type sin(x) and see the graph immediately
Pick the simple, classic or modern layout to fit your workflow perfectly
Whether you are cooking, working on a science project or checking dimensions, we have the converter you need
Travel the world with confidence or track exchange rates seamlessly even without an internet connection
Often sold in bulk packs (e.g., 10 PCS) for professional repair shops. View GYD-9E on AliExpress .
Available under various brand names like WEIHU or generic labels. Check Amazon Listings .
Allows the monitor to control the brightness level. GND: Ground connection.
Protects LED beads from thermal runaway caused by current spikes.
💡 If your display flickers after installation, ensure that the "ENA" signal is a steady voltage (usually 3.3V or 5V) and that your power source can handle the additional 8W–12W load. 🛒 Where to Buy
Unlike simple voltage regulators, the GYD-9E maintains a steady current flow. This is critical for LEDs because:
The is a dual-port constant current driver board specifically engineered for LCD and LED display backlighting. Typically used in 15-inch to 24-inch monitor repairs and retrofits, this component acts as a "step-down" (buck) converter or "booster" depending on the specific backlight configuration, ensuring that LED strips receive a stable, flicker-free current. ⚡ Technical Specifications
"Love this app! It deserves to be at the top. Slick UI, lovely design and features you never thought you need until you realise you do."
"Best calculator app. Has everything you need unless you are doing PhD in combined mathematics."
"Amazing app for a calculation nerd like me. Totally worth full purchase price to go ad free and support the developers."
"In a world of oversimplified apps, this one has every tool you can ever need. Please don't change it!"
Have a feature request or found a bug? Let us know.