# Electronic components > Basic electronic components: buttons, LEDs, resistors, capacitors, transistors, ICs, power modules, batteries and accessories. - Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt) - Category page: https://sigmanortec.ro/en/electronic-components - Prices: RON, VAT included; prices and stock as of 2026-10-22 00:45 (Europe/Bucharest) ## Subcategories - [Buttons and Interruptors](https://sigmanortec.ro/en/llms/c/40.md): PCB buttons, switches, DIP switches, rotary encoders and membrane keypads (52 products) - [LEDs, IRs and Optics](https://sigmanortec.ro/en/llms/c/41.md): LEDs, LED strips and matrices, laser modules, power LEDs, COB and filament LEDs, infrared modules (68 products) - [Resistants and Potentiometers](https://sigmanortec.ro/en/llms/c/42.md): Fixed and SMD resistors, photoresistors, rotary and multiturn potentiometers, digital potentiometer modules and assorted kits (29 products) - [Capacitors, Diodes and Inductors](https://sigmanortec.ro/en/llms/c/43.md): Ceramic and electrolytic capacitors, rectifier, Schottky and Zener diodes, inductors and coils, single or in kits (12 products) - [Transistors](https://sigmanortec.ro/en/llms/c/44.md): Bipolar transistors and MOSFETs (IRF, IRLB, TIP, BC547, 2N3055) plus MOSFET switch modules and assorted kits. (24 products) - [Connectors and Cables](https://sigmanortec.ro/en/llms/c/45.md): Dupont wires, pin header connectors, power connectors, cable terminals, USB cables and heat-shrink tubing for electronics builds. (133 products) - [Integrated Circuits (IC)](https://sigmanortec.ro/en/llms/c/46.md): Integrated circuits: operational amplifiers, NE555 timers, motor drivers, shift registers, microcontrollers and gate drivers (12 products) - [Power Supply](https://sigmanortec.ro/en/llms/c/47.md): AC-DC power supplies, PCB power modules, USB chargers, bench power supplies, DIN rail units and Qi wireless modules (49 products) - [Battery](https://sigmanortec.ro/en/llms/c/48.md): Li-Ion and LiPo batteries, rechargeable AA/AAA cells, chargers, powerbank kits and accessories like heat-shrink tubing and nickel strip. (91 products) - [Modules for Batteries](https://sigmanortec.ro/en/llms/c/50.md): Charging, balancing, BMS, UPS modules and level indicators for lithium and lead-acid batteries (111 products) - [Battery Holders](https://sigmanortec.ro/en/llms/c/51.md): Battery holders for AA, 9V, CR2032 cells and 18650 batteries in various configurations, with switch or connector (19 products) - [Step Down Modules](https://sigmanortec.ro/en/llms/c/52.md): DC-DC step down modules (LM2596, XL4015, XL4005, AMS1117), fixed or adjustable, with or without display, CC-CV (36 products) - [Step Up Modules](https://sigmanortec.ro/en/llms/c/53.md): DC-DC step-up modules (MT3608, XL6009, SX1308) and boost power supplies for various power applications (29 products) - [Other Tension Modules](https://sigmanortec.ro/en/llms/c/54.md): Power modules: voltage regulators, buck-boost converters, PD/QC trigger boards and LM317/LM7805 stabilizers (33 products) - [Other Components](https://sigmanortec.ro/en/llms/c/57.md): Miscellaneous electronic components: fuse holders, ferrite noise filters, glass fuses and resistive heating wire (4 products) - [Relays](https://sigmanortec.ro/en/llms/c/89.md): Electromechanical and solid state relays, optocoupler relay modules, ESP8266 kits, wireless and remote-controlled relays (47 products) - [Temperature and Humidity Control](https://sigmanortec.ro/en/llms/c/90.md): Thermostats and temperature/humidity control modules (XH-W, W1209, STC-1000) for heating, cooling and fans (26 products) - [Electrical valves and Debitmeters](https://sigmanortec.ro/en/llms/c/91.md): Solenoid electrical valves for water/air and flow sensors (debitmeters) like YF-S401 (10 products) - [Sockets](https://sigmanortec.ro/en/llms/c/92.md): IC sockets: DIP 6-28 pin, universal 40-pin ZIF socket, TQFP to DIP adapters (9 products) - [Testing and Measurement](https://sigmanortec.ro/en/llms/c/93.md): Multimeters, oscilloscopes, signal generators, LCR/LED/battery testers and panel measurement instruments (104 products) - [Solar Panels](https://sigmanortec.ro/en/llms/c/96.md): Photovoltaic solar panels, MPPT/PWM charge controllers, microinverters and solar tracking modules (13 products) - [Variators](https://sigmanortec.ro/en/llms/c/99.md): SCR AC voltage regulators and dimmers for power and speed control, 220VAC, up to 6000W (4 products) - [Accessories](https://sigmanortec.ro/en/llms/c/102.md): Soldering accessories: solder paste, flux, soldering iron tips, stands, silicone mats, fume extractors and hot air/soldering guns (43 products) - [Voltage Inverters](https://sigmanortec.ro/en/llms/c/115.md): DC-AC inverter modules and drivers, on-grid solar microinverters, three-phase frequency inverters and accessories like EGS002B (8 products) - [Access Control](https://sigmanortec.ro/en/llms/c/121.md): RFID/NFC modules and cards, readers, electromagnetic locks, fingerprint and facial recognition sensors for access control systems (24 products) - [Protection Module](https://sigmanortec.ro/en/llms/c/126.md): Electronic protection modules: overvoltage, reverse polarity, overcurrent, speaker protection and optocouplers. (9 products) - [LED Drivers](https://sigmanortec.ro/en/llms/c/130.md): LED driver modules and controllers: TLC5947 PWM driver, touch dimmers, RGB controllers and LED flashlight drivers (6 products) - [ZVS module](https://sigmanortec.ro/en/llms/c/133.md): ZVS modules for induction heating and DC-DC step-up converters, with induction coils (5 products) - [Timer Modules](https://sigmanortec.ro/en/llms/c/134.md): Timer modules and delay relays (NE555, programmable, with display) for adjustable time control (7 products) - [Component Kits](https://sigmanortec.ro/en/llms/c/179.md): Assorted kits of resistors, capacitors, transistors, diodes, LEDs, potentiometers and SMD or THT connectors. (25 products) - [Crystals and Oscillators](https://sigmanortec.ro/en/llms/c/183.md): Crystals and oscillators for clock signal generation, including programmable I2C frequency modules (2 products)