267 A 555-Timer Clone for Tiny Tapeout 6
267 : A 555-Timer Clone for Tiny Tapeout 6
- Author: Vincent Fusco
- Description: Blinks an LED the hard way
- GitHub repository
- Open in 3D viewer
- Clock: 0 Hz
- Feedback: ✅ 1
How it works
It duplicates the functionality of a 555 timer. Try configuring it in the "astable" configuration using external resistors and capacitors.
How to test
Find a 555 timer datasheet and attempt some of the suggested circuits.
Connect pins to a breadboard with jumper wire.
Construct circuit shown in Figure 7-5 at: https://www.ti.com/lit/ds/symlink/lmc555.pdf?ts=1711738020668.
Test 2:
Duplicate circuit in Figure 6-2 at: https://www.ti.com/lit/ds/symlink/lmc555.pdf?ts=1711738020668. Compare resulting maximum frequency. The CMOS-based TI 555-Timer has a maximum frequency of 3.0MHz. Compare.
External hardware
- Wires for breadboard.
- Through-hole resistors and capacitors of various values, LEDs, etc.
- Breadboard.
- Oscilloscope (for maximum frequency test)
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | DI_RESET_N | DO_OUT | |
| 1 | |||
| 2 | |||
| 3 | |||
| 4 | |||
| 5 | |||
| 6 | |||
| 7 |
Analog pins
ua | PCB Pin | Internal index | Description |
|---|---|---|---|
| 0 | B1 | 7 | V_THRESH_I |
| 1 | B3 | 9 | V_TRIG_B_I |
| 2 | B2 | 8 | V_DISCH_O |
User feedback
- mattvenn: tested with the suggested circuit 7-5, 4.7k resistors and (I think) 15uF cap. Got about 10Hz on the output Link for more details