# Simple Delay Timer Circuit ## Description This is a very simple timer circuit. When you push down to turn on the S1, this will turn on the LED and it also will charge the C1 Capacitor. Then upon releasing the push button switch, the LED will stay lit for couple of seconds until C1 is completely discharged. ## Project Details - **Owner:** jharwinbarrozo - **Created:** 2/15/2021 - **Last Updated:** 10/5/2021 - **Visibility:** Public - **Stars:** 1 - **Forks:** 2 ## Key Components ### D1 — [LED](https://www.flux.ai/jharwinbarrozo/led-tht~gr.md) - Forward Voltage: 1.70 - Saturation Current: 93.2e-12A - Breakdown Voltage: 0V - Emission Coefficient: 3.73 - Series Resistance: 0.42Ω **Pins:** - ANODE - CATHODE ### PS1 — [DC Supply](https://www.flux.ai/jharwinbarrozo/dc-supply~35.md) - Voltage: 9V - Voltage: 5V **Pins:** - ANODE - CATHODE ### Q1 — [NPN Transistor](https://www.flux.ai/jharwinbarrozo/npn-transistor~hqd.md) - Leakage Current: 1e-13A - Manufacturer Part Number: BC547 - Manufacturer Name: NXP Semidconductors - Beta / hFe: 110 **Pins:** - B - C - E ### S1 — [Push Button](https://www.flux.ai/jharwinbarrozo/push-button~eqk.md) **Pins:** - P1 - P2 *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/jharwinbarrozo/simple-delay-timer-circuit~jrx](https://www.flux.ai/jharwinbarrozo/simple-delay-timer-circuit~jrx).* --- *Generated from [https://www.flux.ai/jharwinbarrozo/simple-delay-timer-circuit~jrx](https://www.flux.ai/jharwinbarrozo/simple-delay-timer-circuit~jrx)*