Intermittent model

SKU: 110051

Intermittent model

€2,78
€2,78
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This is a pre order item. We will ship it when it comes in stock.

Flashing model, when a circuit is connected to a 4.5V battery the lamp lights up intermittently at 1 second intervals. Sold without batteries.

When a 4.5 V voltage source is connected, the base current of Transistor BC 558 flows to the 560 kΩ resistor. When the current passes through the said resistance, the resistance passes and the current is carried through the 1.8 kΩ resistor to the base of Transistor BC 548/547. Thus also becoming a passage.

Now the electrolytic capacitor is charged through the base of Transistor BC 558 and this base current passes through the transistor and the bulb turns on. When the capacitor is charged, the base current of Transistor BC 558 is not sufficient to keep it on. For this reason, no current flows to Transistor BC 548/547 which also turns it off. The bulb goes off. The collector voltage rises to 4.5 V. The charged state of the capacitor is maintained momentarily and the voltage rises at the base of Transistor BC 558 to 7.4 V. Then the capacitor is discharged through the 560 kΩ resistor. The voltage at the base of Transistor BC 558 drops to 3.8 V. The circuit is then reset.

Recommended age:
12+

Construction time:
2 h.

Pairs well with

NOTICE: If the box/packaging is dented or damaged, and/or the protections are broken, this observation must be indicated on the carrier's delivery note. Once the goods have been delivered, and without any incidents on the carrier's delivery note, the customer will be responsible for any visible damage.

After receiving your order, you have 14 working days to exchange or return the product(s) purchased. This option is valid for the vast majority of items available on the website, with the following exceptions:

  • Items that are made to order, according to the customer's instructions, cannot be exchanged or returned;
  • Items whose sale involves installation on site cannot be exchanged or returned;
  • Items that are damaged due to use, are not in their original packaging, or are incomplete cannot be exchanged or returned.
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