Skip to main content

All Questions

Tagged with
Filter by
Sorted by
Tagged with
0 votes
2 answers
90 views

On off switch with 2xLED

I'm trying to connect an old/possibly broken switch to a light from a 12V battery (very good first question isn't it?). The switch is meant to light Green when ON mode and Red in OFF mode. The schema (...
ubi's user avatar
  • 105
3 votes
2 answers
817 views

Push button for different actions in every press?

I'm trying to learn some electronics and I have something in mind that I don't know if it is possible to achieve. I've worked before with micro-controllers (Arduino, etc) and I know I would be able ...
JV Lobo's user avatar
  • 355
0 votes
2 answers
79 views

LED frequency indicator for multiturn knob

I’m designing a simple SW receiver for the 20m band and need a rudimentary frequency indicator activated by the multiturn rotary knob. The knob is part of a recuperated Pritt gluestick mechanism ...
Erik Devriese's user avatar
1 vote
2 answers
615 views

On/Off toggle with delay using bi-color led

I need to design a circuit so that when a button is pressed, the red LED lights and starts an activate delay circuit so that when capacitor C2 (100uF) is charged it turns the red LED OFF and green ...
Igor Petev's user avatar
1 vote
1 answer
214 views

SP4T slider switch on two states at the same time

I have a SP4T slider switch, where common is connected to the power rail and each pin is connected to a led and resistor. The problem is, if I position the switch between two terminals, the leds of ...
abc's user avatar
  • 13
2 votes
2 answers
2k views

Wiring LEDs in parallel with 5-pin LED on/off switch

simulate this circuit – Schematic created using CircuitLab I'm creating a costume with some lights and am trying to run 10 LEDS and an on/off button with an LED from a 9V battery (so 11 LEDs in ...
Alister M's user avatar
1 vote
2 answers
1k views

Momentary to Toggle Switch for Tiny Application

I need to put a circuit into a pen to turn on and off an LED using 3 AG3 or LR41 batteries connected in series. The LED will be on the tip of the pen and the switch will be on the side surface of the ...
Qelopin Uacel's user avatar
1 vote
3 answers
1k views

Momentary\Pushbutton Latch Switch

I'm trying to make a circuit that will latch on\off with a pushbutton. This is what I have, but the LED just stays on even though the current shows the latch is working. Thoughts? Thanks :)
Dominic Luciano's user avatar