555 timer tester

261

03:56:28

555 timers can be really really cheap. Like 2 years ago, I ordered 50 of them for around 3€ on amazon. Today, I built a circuit, but it didnt work. So I checked the connections and tested every component with my transistor tester, but everything was fine. Finally, I got to the conclusion, that the 555 timer didnt work, which was the case. I replaced it and it worked.

To prevent this from wasting my time again, I soldered together this circuit (with sockel instead of 555), to test my 555 timers. 

When both LEDs light up, the timer does work. If not, then not. 

2 more of my timer didnt work and I am glad that I built this thing.

published 7 years ago

BillyT

7 years ago

I like the idea, but the component values selected in this particular case are not good for the desired function. Try ; http://everycircuit.com/circuit/5905758945017856

LeButch

7 years ago

I understand your point, but I want to test if my 555 timers can actually handle the 100kHz. Normally they should be able to handle around 500kHz.

sshsslfun

7 years ago

The highest I've seen a 555 with a proper config is 480kHz. It struggled to get past that for me.

LeButch

7 years ago

My 30€ oscilloscope cant even mesure more than 300kHz...

sshsslfun

7 years ago

Oof, I have a USB oscilloscope for 100$ that can meassure up to 25MHz.

LeButch

7 years ago

Whats its name?

sshsslfun

7 years ago

The 6022BE Hantek USB, you can find it on amazon and on ebay

sshsslfun

7 years ago

20MHz*

LeButch

7 years ago

Thanks

ViolationMad

7 years ago

@LeButch I know your studying and you probably don't have a lot of money, but I think it's worth the investment to buy a little more expensive one, a Rigol for example. Ive watched a lot of videos about the usb oscilloscopes and they are OK but not comparable to a real one. I think there are a lot of users here which can recommend you a specific model but I just remeber there is a Rigol scope which is a pretty good deal at about 400€.

LeButch

7 years ago

I dont really think I need a good scope, I dont do much with high frequencies.

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.