This project, called “Simple-Timer” is a programmable Timer and electronic switch with an integrated LiPo Battery Monitor that is based around a PIC microcontroller.
The “Simple-Timer” includes a fairly accurate timer that is programmable (via pushbutton) by the user and can be programmed to time a 5, 10, 15, 20,25 or 30 minute event. When the timer/switch is enabled (tap small pushbutton), the onboard LED indicates the output is active by lighting solid (the circuit also outputs the same voltage as your supply/battery voltage using a PN2222 NPN transistor or a high current MOSFET).
Bicycle Light Projects
Constructing or modifying a bicycle lighting system should be done carefully to enhance the lighting and not displace a minimum lighting that is needed for safety.In rural areas and mountain bikes more lighting may be needed.
Dynamo LED light electronics – A nice selection of electronic circuits to power LEDs from a bicycle dynamo
Battery LED light electronics – A basic step-up circuit to power an LED from a battery
- Universal single-LED headlight
- Universal triple-LED headlight
- Universal LED taillight mechanical construction
High-power halogen headlight from standard parts, battery-operated
- Lots of light for your money
- All standard parts, easily completed in half a day