I've been trying to drive a piezo element that according to the manufacturer runs at 1.6mHz.
The best chance I have is a 555 timer that claims to be suitable up to 2mhz. I understand the maths and I've done the calcs and it should technically work with 300ohm 300 ohm and 10pf capacitor. I ran the circuit in circuit wizard and I get a square waveworm that looks to go crazy but it doesn't give me a way of actually measuring the frequency accurately.
Can anyone offer any experience as to what limits are imposed on the user? To increase the frequency for example you can use a smaller capacitor that charges to the threshhold faster or a smaller resistor to charge the capacitor faster. Is there an absolute minimum capacitor that is allowed and any further changes would need to be done using resistors etc?
The best chance I have is a 555 timer that claims to be suitable up to 2mhz. I understand the maths and I've done the calcs and it should technically work with 300ohm 300 ohm and 10pf capacitor. I ran the circuit in circuit wizard and I get a square waveworm that looks to go crazy but it doesn't give me a way of actually measuring the frequency accurately.
Can anyone offer any experience as to what limits are imposed on the user? To increase the frequency for example you can use a smaller capacitor that charges to the threshhold faster or a smaller resistor to charge the capacitor faster. Is there an absolute minimum capacitor that is allowed and any further changes would need to be done using resistors etc?