# Adjustable rectangular signal generator

- Page: https://sigmanortec.ro/en/adjustable-rectangular-signal-generator
- Price: 6.66 RON
- Availability: In stock; 1-2 zile
- Reference: 33213 · EAN: 5940392139382
- Category: Electronic components > Testing and Measurement > Signal Generators
- Package (shipping data): 0.007 kg
- Updated: 2026-09-23
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 01:33 (Europe/Bucharest)

## Description

Square wave signal generator module with NE555, ideal for quick tests, adjustable pulse in microcontroller projects and stepper motor control. Offers 4 frequency ranges selectable with jumper, frequency and duty cycle adjustable from potentiometers, 5-15V DC power supply and voltage-dependent amplitude output. Integrated LED indicates signal status and rhythm.
The signal generator uses an NE555 timer to generate a square wave signal. It can be used as an adjustable pulse for microcontroller applications as well as for driving stepper motors.
IMPORTANT: Before changing the frequency range (moving the jumper), always turn off the module!
The NE555 timer is configured in 4 frequency ranges:
- 1Hz to 50Hz
- 50Hz to 1 KHz
- 1KHz to 10KHz
- 10KHz to 200KHz
The range can be selected via a jumper (see image).
The frequency within the selected range and the duty cycle are adjustable through the two potentiometers.
Supply voltage: 5 - 15VDC
Supply current: 15mA at 5V, 35mA at 12V
Output amplitude: 4.2V at 11.4 peak to peak, depending on the supply voltage
Integrated LED that lights up at LOW output and blinks according to the frequency.