I recently began working on a project for school.
I need to create a circuit that turns a laser diode for 5 milliseconds then off. then wait 2-3 secs then on again. the time when off does not need to be so precise cold be between 2 seconds to 5 it does not matter for now.
I don't have lots of experience but do understand basic electronic concepts. I would like this project to be as simple as possible. without the use of specialized ics or even 555s. I have in mind something like an npn transistor to be used as a switch and capacitors as timers. using the time it takes to charge and discharge capacitors to my advantage. I don't know it it would be wise or even posible to use a relay instead of a transistor for those switching speeds.
I have the following materials at hand
* LDRs
* 650nm 3v 5mW laser diodes
* almost any size resistors
* almost any size capacitors and types
* 5vdc and 12vdc relays
* LD13003A NPN transistors (over 10 units)
* BUX80 NPN transistors (over 20 units)
* TIP32A PNP transistors (over 20 units)
* Prototype pcb boards
* lots of free time!
I need to create a circuit that turns a laser diode for 5 milliseconds then off. then wait 2-3 secs then on again. the time when off does not need to be so precise cold be between 2 seconds to 5 it does not matter for now.
I don't have lots of experience but do understand basic electronic concepts. I would like this project to be as simple as possible. without the use of specialized ics or even 555s. I have in mind something like an npn transistor to be used as a switch and capacitors as timers. using the time it takes to charge and discharge capacitors to my advantage. I don't know it it would be wise or even posible to use a relay instead of a transistor for those switching speeds.
I have the following materials at hand
* LDRs
* 650nm 3v 5mW laser diodes
* almost any size resistors
* almost any size capacitors and types
* 5vdc and 12vdc relays
* LD13003A NPN transistors (over 10 units)
* BUX80 NPN transistors (over 20 units)
* TIP32A PNP transistors (over 20 units)
* Prototype pcb boards
* lots of free time!