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When deciding how to wire your LEDs for your bookmark, you need to decide not only where you want the LED placed, but also how many to use, and whether they will be in Series or Parallel (see below). One key item to note, the LEDs are directional. Make sure when you wire them, you connect the "+" side of the LED to the "+" side of the battery. If you do it backwards, the LED won't light and may burn out.
Steps
Steps
Get one battery and one LED
Wire them together to ensure they work
Determine how many LEDs you want on your bookmark
Sew the LEDs in place
Sew the battery holder in place
Connect the LEDs to the battery with the conductive thread
Add battery and turn on
Circuits
Circuits
Two types of electrical circuits are the series circuit and the parallel circuit.
Series Circuit
Series Circuit
In a series circuit, the electrical current is only able to flow around a single path. The current will flow from a power source, such as a battery, into one or more electrical loads, such as LEDs, and then back to the power source. In a series circuit, the same amount of current (amps) from the power source flows through each load. The voltage (volts) in a series circuit is divided up across all of the loads. If one of the loads on a series circuit stops working, the current will not be able to flow through the rest of the circuit, and the rest of the loads will also stop working. Current: ITotal = I1 = I2 = I3
Voltage: VTotal = V1 + V2 + V3
LEDs get dimmer with each additional LED added until there's not enough voltage to turn on
The battery last (approximately) just as long with several LEDs as it does with one
Parallel circuit
Parallel circuit
In a parallel circuit, the electrical current may flow along multiple paths before returning to the power source. The voltage in a parallel circuit is the same across all of the loads in the circuit. In a parallel circuit, the current (amps) is divided up across all of the loads. If one of the loads in a parallel circuit stops working, the other loads in parallel will be able to continue to work.
Current: ITotal = I1 + I2 + I3
Voltage: VTotal = V1 = V2 = V3
All LEDs will be as bright as if there was just 1 LED
More LEDs drains the battery faster
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