Recent content by Daniel Floyd

can anybody help with this its pretty urgent ?

forgot to mention this must be low power my V2 supply is 50mA and 3.5V Maximum (switches on and off thus super capacitor charging circuit)

Hi I am trying to create a circuit which i can use as a voltage controlled switch. I have 2 voltage inputs, ** A constant 3V source V1, ** A source which charges up to 3.5V and then slowly discharges V2. I would like to amalgamate both sources so as when V2 discharges...

i got this slightly wrong, i now believe the circuit before the UVLO is a charging circuit and when the voltage rises above 4.7V the UVLO passes this on to the output. I then believe the R5 and C1 create the time constant thus creating hysteresis which means the voltage will be locked on until...

Thank you I have ordered some 22v zenner diodes in which I will use tomorrow. I tried to use this before but this didn't work I assume its because I used a series resistance thus making my over all impedance very high which pretty much stopped my circuit from working. I will simple try using...

HI. I am using Piezo Electric as a AC voltage source which gives voltage spikes of around 35V little current because the impedance of the material is verry high, I would like to clip this voltage to 22 Volts i have seen that a 2 x 22V zenner diodes can be used back to back is thie right or...

UVLO Circuit, Appologies for the error.

Jony. infact i have posted the wrong picture by mistake i do appologise, that is a picture of an over voltage system although i assume that it works the same anyway. I have reattached the Under Voltage system Thank you for the mathematics you have provided do you know the equation to work...

With Some more research it has become apparent that the hysteresis in fact sets a sort of boundary line when using a schmitt trigger for example:Under Voltage Lockout is 3.0V and the Hysteresis is 500mV so because of this the device will turn off at 3.0V allowing the charge to reacumulate and...

I believe the Arduino would be a good idea i know of people that have used Arduino to RECIEVED a signal via Bluetooth to output things such as lighting up a warning light a solenoid valve check this website out it explains everything you will need really...

Thank you i will begin my search around a TVS from Mouser I will then post my findings.

As fare as I have researched UVLO Under Low Voltage Lockout is a circuit which is used to turn off and on the output power of a electronic device according to voltage selected. For instance in a charging circuit the power will only flow to the load once the capacitor has charged to a certain...

Ok i am a hobbyist and i currently building a circuit in which when i place this on an oscilloscope i am gaining a voltage spike of 38V i need to minimise this spike down to a maximum of 20V in order to protect my external circuitry. When my circuit is working under 20V i need this protective...

polyvinylidenefluoride resin can be found in a film substance. can anybody help me by telling me where i could buy this material from?

ok i need to know the value of the capacitor which i need. i have a pulse voltage of 6mV which i want to stabilise to create a voltage which will power a small L.E.D. i currently have a bridge rectifier and i know i need a capacitor but what would the value of this capacitor be.