# 9V LED Blinker

## Description

Hand\-solderable 9V battery\-powered red LED blinker using a 555 timer, on/off switch, through\-hole passives, and a PP3 battery holder\.

## Project Details

- **Owner:** vngelo
- **Created:** 7/29/2026
- **Last Updated:** 7/29/2026
- **Visibility:** Public
- **Power Requirements:** Battery
- **Implementation Details:** Through\-hole hand\-solderable 555 astable LED blinker
- **Domain:** Consumer Electronics
- **Human Interface:** Switches

## Key Components

### BT1 — [BH9VPC](https://flux.ai/adrian95/bh9vpc.md)

- Manufacturer Part Number: BH9VPC
- Role: Energy Storage
- Role Details: 9V battery source for blinker
- Manufacturer Name: MPD
- Part Type: Battery Holder
- Datasheet URL: https://www\.memoryprotectiondevices\.com/datasheets/BH9VPC/BH9VPC\-datasheet\.pdf
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- \- [pin \-]
- \+ [pin \+]

### D1 — [LTL\-307EE](https://flux.ai/vasy_skral/ltl-307ee~a2.md)

- Manufacturer Name: Lite\-On Inc\.
- License: https://creativecommons\.org/licenses/by/4\.0/
- Datasheet URL: https://mm\.digikey\.com/Volume0/opasdata/d220001/medias/docus/1153/LTL\-307EE\.pdf
- Part Type: LED
- Role: Signal Generation
- Role Details: Red LED driven by 555 OUT pin
- Manufacturer Part Number: LTL\-307EE

**Pins:**
- A [pin 2]
- K [pin 1]

### SW1 — [450301014042](https://flux.ai/markwuflux/450301014042~nt.md)

- Manufacturer Name: Wurth Elektronik
- Role: Switching
- Datasheet URL: https://datasheet\.datasheetarchive\.com/originals/distributors/DKDS\-9/165080\.pdf
- Manufacturer Part Number: 450301014042
- Role Details: SPDT slide switch wired as SPST on/off battery disconnect

**Pins:**
- 1 [pin 1]
- 2 [pin 2]
- 3 [pin 3]

### U1 — [NE555P](https://flux.ai/adrian95/ne555p~870.md)

- Manufacturer Part Number: NE555P
- Role: Timing
- License: https://creativecommons\.org/licenses/by/4\.0/
- Symbol Style: parametric\-v1
- Part Type: Integrated Circuit
- Datasheet URL: https://www\.ti\.com/general/docs/suppproductinfo\.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww\.ti\.com%2Flit%2Fgpn%2Fse555
- Manufacturer Name: Texas Instruments
- Role Details: NE555P astable oscillator for 1 Hz LED blink

**Pins:**
- CONT [pin 5]
- DISCH [pin 7]
- GND [pin 1]
- OUT [pin 3]
- RESET [pin 4]
- THRES [pin 6]
- TRIG [pin 2]
- VCC [pin 8]

*The full schematic, PCB layout, bill of materials, and interactive design are available at [https://flux\.ai/vngelo/9v\-led\-blinker\~uy](https://flux.ai/vngelo/9v-led-blinker~uy).*

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