So I bought this really cheap rc car just to tinker with. I took the motor off the original circuit and made a new on that is triggered by the original circuit, so now the motor is ran on 18v instead of 6. I want to engage one 9 volt then automatically engage another 9 volt battery, because 18 volts is too much take off power for that car so I want to stair step its power. Any ideas how this can be done? thanks!
Help need to delay a relay
- Thread starter ihfarmer
- Start date
A cheap and dirty fix is a relay and capacitor across the coil.
Find a tiny 9 or possibly 12 vdc relay. Highest ohms coil the better.
Connect a 2,000uf or so across the coil.
Feed coil from whatever powers motor circuit, thru the largest value resistor that will pull it in. 100 ohms or so. To the coil/cap. combo.
Connect the 2-9v in series as you have.
Leave the negative (common) side connected to (-)motor as is.
Connect the +9 volt lead (from center tap) to the NC of relay.
Connect the +18 volt lead to the NO of relay.
Connect (+)motor lead to relay common.
When powering circuit motor will be on 9v.
After cap charges and pulls in, relay will switch motor to 18v.
Find a tiny 9 or possibly 12 vdc relay. Highest ohms coil the better.
Connect a 2,000uf or so across the coil.
Feed coil from whatever powers motor circuit, thru the largest value resistor that will pull it in. 100 ohms or so. To the coil/cap. combo.
Connect the 2-9v in series as you have.
Leave the negative (common) side connected to (-)motor as is.
Connect the +9 volt lead (from center tap) to the NC of relay.
Connect the +18 volt lead to the NO of relay.
Connect (+)motor lead to relay common.
When powering circuit motor will be on 9v.
After cap charges and pulls in, relay will switch motor to 18v.
Thats what i might do sounds simple enough cause I don't have that good of understanding of how PMW's or FET's work.
