In this article we look at a NE555 adjustable pulse generator which can be purchased as a kit, board and components
Input voltage: 5 volts to 15 volts DC. 5 volts power supply, the output current can about 15 mA; with a 12 volts power supply, the output current can be up to 35 mA
-Input Current: 100 mA
-Output amplitude: 4.2 volts V-PP to 11.4v V-PP (depending on the input voltage, the output amplitude is not the same)
-Maximum output current: 15 mA (5V power supply, V-PP greater than 50%), 35 mA (12 volts power supply, V-PP greater than 50%)
You can short and use one of the capacitors in the circuit, there are 4 options
1Hz ~ 50Hz
50Hz ~ 1kHz
1KHz ~ 10kHz
10kHz ~ 200kHz
Start with the resistor, ceramic capacitors, socket and then I soldered on the electrolytics, headers and potentiometers
The header needs to be cut up, I received a 11 way single pin header which I cut into 3.
I did receive the wrong value of cap
|Ceramic capacitor||C1，C2||104 – 0.1uF||2|
|Ceramic capacitor||C3||102 – 0.001uF||1|
|5 mm red LED||D1||1|
|8 pin IC socket||1|
|Electrolytic capacitor||C4，C5||100UF 50V||2|
|Electrolytic capacitor||C6||1UF 50V||1|
A mere £0.75 from Aliexpress, with a shipping charge in places
This is a simple little kit which is ideal for beginners.
The PCB is single sided and all of the components are through hole. You get a socket for the 555 timer and of course the 555 timer itself, from a cost perspective its hard to complain.
The incorrect component was annoying but I had plenty of those capacitors anyway.
Easy to solder, decent quality