9 V battery
Alkaline 9 V · ~1.5 Ω internal · 550 mAh · 100 % left
Try it on the benchThe lab drops it on an empty bench and opens its datasheet card.
Lessons and builds that use it
- Battery internal resistance
- Continuity tester (build)
- LM386 speaker amplifier box (build)
- Perfboard: make every connection yourself
- How a PCB works: the layer stack-up
- PCB layout: route the board and run it
- 1. Resistor and LED: the first circuit (build)
- 2. Adding a switch (build)
- 3. Potentiometer: a dimmer (build)
- 4. Diode: reverse-polarity protection (build)
- 5. Capacitor: a soft fade-out (build)
- 6. LDR: sensing light (build)
- 7. Transistor: the light switches itself (build)