Signal Generator, DC 3.3-30V Function Generator 5-30mA LCD Display PWM Pulse Frequency Duty Cycle Rectangular Wave Square Wave Signal Generator

This is an easy, cheap way to generate test frequencies. I'm using it to dial in audio frequencies for chiptune projects. It's very simple to use the included serial functionality. A few jumpers to a Raspberry Pi or TTL serial adapter and you're good to go.

Easy to use and works as advertised. Just purchased a second one for another project.

Good satisfaction

It's not the most beautiful square wave, but this thing works. It has separate controls for frequency and duty cycle and they both work independently. Some of others change both at the same time.

Has worked well for my Ls swap alternator. Mine is installed under the hood on a wheel we'll and it has been fine even through months of snow. I should probably mount it where I can lower the charge periodically.

Muy bien gracias saludos desde cali Colombia gracias

Works as stated with minimal instructions. Excellent value for the money.

did not perform as expected. unsure if broken or just bad unit, but mine did not output a pwm signal