# KNACRO NE555 Pulse Module Square Wave Rectangular Wave Signal Generator Frequency Duty Cycle Adjustable DC 5V-15V Output Frequency 1Hz-50Hz, 50Hz-1KHz, 1KHz-10KHz, 10KHz-200KHz Four Optional — resale value

**KNACRO NE555 Pulse Module Square Wave Rectangular Wave Signal Generator Frequency Duty Cycle Adjustable DC 5V-15V Output Frequency 1Hz-50Hz, 50Hz-1KHz, 1KHz-10KHz, 10KHz-200KHz Four Optional** sells for about **$8.6** new or sealed, based on real closed eBay sales.

## Value

| Condition | Value (USD) |
| --- | --- |
| New / Sealed | $8.6 |

Values are medians of real closed eBay sales, updated 2026-07-16. They are estimates for reference, not offers or appraisals — condition, completeness and edition move them a lot, so compare against the sold listings before pricing anything.

## Check the market

- [Sold listings on eBay](https://junkpal.ai/api/go?to=https%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_nkw%3DKNACRO%2520NE555%2520Pulse%2520Module%2520Signal%2520Generator%26LH_Sold%3D1%26LH_Complete%3D1%26mkcid%3D1%26mkrid%3D711-53200-19255-0%26siteid%3D0%26campid%3D5339166094%26toolid%3D10001%26mkevt%3D1%26customid%3Dmd-sold&p=md-sold) — the closed sales these medians are computed from
- [Live listings on eBay](https://junkpal.ai/api/go?to=https%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_nkw%3DKNACRO%2520NE555%2520Pulse%2520Module%2520Signal%2520Generator%26mkcid%3D1%26mkrid%3D711-53200-19255-0%26siteid%3D0%26campid%3D5339166094%26toolid%3D10001%26mkevt%3D1%26customid%3Dmd-live&p=md-live) — what sellers are asking right now

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## Details

| Field | Value |
| --- | --- |
| Brand | KNACRO |
| Category | All Electronics |

## About

This is the KNACRO NE555 Pulse Module, a signal generator capable of producing square and rectangular waves. It features adjustable frequency and duty cycle, with output voltage ranging from 5V to 15V.

This module is ideal for electronics hobbyists, engineers, and technicians needing a versatile signal source for testing and prototyping.

Resale value is influenced by the module's overall condition, whether all four optional frequency ranges are present and functional, and its completeness.

## FAQ

**What kind of signals does the KNACRO NE555 produce?**

It generates square and rectangular waves with adjustable frequency and duty cycle.

**What factors affect the resale value of this module?**

The condition of the module, its completeness, and the inclusion of all optional frequency ranges are key drivers.

**What is the operational voltage range for this module?**

The output voltage is adjustable between 5V and 15V.

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Full price guide: https://junkpal.ai/products/knacro-ne555-pulse-module-square-wave-rectangular-wave-signal-generato-b07469vhd5
How these values are computed: https://junkpal.ai/methodology
Cite as: "JunkPal price guide value as of 2026-07-16, based on real sold listings (junkpal.ai)"