Hello. A novice searching for guidance here.
I'm trying to assemble a simple schematic that'll give me 1-2 Mhz (actually 1.65) square signal. After fruitless attempt at classical multivibrator with 2 transistors, I moved on to ICs. First tried NE555, but after some research I figured that it can't go higher than a few hunderd kHz.
But TS555 specification states its advantage of going up to a couple of Mhz. Datasheet features this formula: \[ f = {1.44 \over (R_a + 2R_b) * C} \]
I assembled it on a breadboard:
For measuring the frequency, I use GM328A. It may not be the most accurate device, but it should handle this and unfortunately I don't have access to a proper oscilloscope.
Sadly, the maximum number I saw on the screen was about 250kHz. I tried a range of capacitors and resistors. Even tried different voltage out of curiosity: 4.5, 9, 24. Also, tried adding some resistance load. Tested on 2 different TS555 chips, both give the same result.
Any advice to what I am missing here?
I'm trying to assemble a simple schematic that'll give me 1-2 Mhz (actually 1.65) square signal. After fruitless attempt at classical multivibrator with 2 transistors, I moved on to ICs. First tried NE555, but after some research I figured that it can't go higher than a few hunderd kHz.
But TS555 specification states its advantage of going up to a couple of Mhz. Datasheet features this formula: \[ f = {1.44 \over (R_a + 2R_b) * C} \]
I assembled it on a breadboard:
For measuring the frequency, I use GM328A. It may not be the most accurate device, but it should handle this and unfortunately I don't have access to a proper oscilloscope.
Sadly, the maximum number I saw on the screen was about 250kHz. I tried a range of capacitors and resistors. Even tried different voltage out of curiosity: 4.5, 9, 24. Also, tried adding some resistance load. Tested on 2 different TS555 chips, both give the same result.
Any advice to what I am missing here?